A section of cross section of a concrete culvert laid on a level concrete slabThe culvert has an outer height of 135cm, an outer width of 245cm and a thickness of 15cmcalculate the inner height of the culvert

Answers

Answer 1

The inner height of the culvert, given the outer height and the outer width, would be 105 cm.

How to find the inner height ?

The culvert is essentially a rectangular structure, and the thickness affects both the height and the width.

To calculate the inner height of the culvert, you subtract twice the thickness of the culvert from the outer height, because the thickness is taken off from both the top and the bottom of the culvert.

Inner height = Outer height - 2 x (Thickness)

= 135 cm - 2 x 15 cm

= 135 cm - 30 cm

= 105 cm

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Related Questions

consider the following table summarizing the speed limit of a certain road and the number of accidents occuring on thst road in janurary

Answers

The table presents data on the speed limit of a certain road and the number of accidents occurring on that road in January. The information allows us to examine the relationship between speed limits and accident occurrences.

By analyzing the data in the table, we can identify any patterns or correlations between the speed limit and the number of accidents. This analysis can help us understand the impact of speed limits on road safety.

To begin, we can examine the data points in the table and look for any trends. We may observe that as the speed limit increases, the number of accidents also increases or vice versa. This information can provide insights into the effectiveness of speed limits in reducing accidents. If we find that higher speed limits correspond to a higher number of accidents, it suggests that the current speed limits may need to be revisited and adjusted to promote safer driving conditions.

Additionally, we can calculate the accident rate per unit of the speed limit to gain a better understanding of the risk associated with different speed limits. For example, by dividing the number of accidents by the corresponding speed limit, we can determine the accident rate per mile per hour or per kilometer per hour. This calculation allows us to compare the safety impact of different speed limits more accurately.

Overall, the data presented in the table provides valuable information for evaluating the relationship between speed limits and accident occurrences on a specific road. Analyzing this data can contribute to informed decision-making regarding speed limit regulations, road safety measures, and accident prevention strategies.consider the following table summarizing the speed limit of a certain road and the number of accidents occurring on that road in January

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Trevor purchases a car. The value of the car is modeled by the function y=22000(0. 86)^t. Which statement below best describes the base of 0. 86

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The base of the function [tex]y = 22000(0.86)^t[/tex] is 0.86 for the given data in the question.

What is exponential decay?Exponential decay is a type of mathematical behavior that occurs when a function's rate of decay is proportional to the function's current value.

As a result, the amount of time it takes for the function to decay by a certain proportion is consistent throughout the decay process. What is the exponential decay formula?

The exponential decay formula is expressed as follows:y = a(1 - r) tWhere:y = final amounta = initial amountr = rate of decayt = time

What is the decay factor?The decay factor is defined as the constant ratio between the initial amount of material and its amount at a later time. This ratio is used to calculate the time needed for a quantity to decay to a certain level.

Here in the given function, the base of the function [tex]y=22000(0.86)^t[/tex] is 0.86. Therefore, the correct answer is "The base of 0.86 is a decimal number between 0 and 1 that determines the rate of decay of the car's value."


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Q4. Ahmad left his house at 9. 25 a. M. And reached town B at 11. 05 p. M. How long did his whole journey last? Give your answer in hours and minutes

Answers

Ahmad's whole journey lasted for 13 hours and 40 minutes.

How to find  How long did his whole journey last

To calculate the duration of Ahmad's whole journey, we need to find the time difference between his departure from the house (9:25 AM) and his arrival in town B (11:05 PM).

First, let's convert the time to a 24-hour format for easier calculation.

9:25 AM in 24-hour format is 09:25.

11:05 PM in 24-hour format is 23:05.

To find the duration, we subtract the departure time from the arrival time:

23:05 - 09:25 = 13:40

The duration is 13 hours and 40 minutes.

Therefore, Ahmad's whole journey lasted for 13 hours and 40 minutes.

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Plot points at (2, 0), (4, 0) and (3, 0). What is true about all points whit a y- coordinate of 0?

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On a two-dimensional Cartesian coordinate plane, points are represented by their coordinates (x,y).

The horizontal axis is called the x-axis and the vertical axis is called the y-axis. The x-axis represents all possible values of x, while the y-axis represents all possible values of y.

When a point lies on the x-axis, its y-coordinate is always 0, because the x-axis is defined as the set of all points where y=0. Therefore, any point with a y-coordinate of 0 will lie on the x-axis.

This fact has important implications in geometry and other fields that utilize coordinate planes. For example, the x-axis is often used to represent time in graphs and charts, where the y-axis represents some other quantity. Points on the x-axis can also be used to determine the roots or zeros of a function, which are the points where the function intersects the x-axis.

Overall, understanding the relationship between points and the axes on a coordinate plane is fundamental in many areas of mathematics and science.

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The standard deviation of a point estimator is the _____.

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The standard deviation of a point estimator is a measure of the variability or precision of the estimator.

In statistics, a point estimator is a function that uses sample data to estimate an unknown parameter of a population. The standard deviation of a point estimator quantifies how much the estimates from different samples are expected to deviate from the true value of the parameter. A smaller standard deviation indicates a more precise estimator, as the estimates are expected to be closer to the true value. Conversely, a larger standard deviation suggests a less precise estimator with estimates that are more spread out. By calculating the standard deviation of a point estimator, we can assess its reliability and determine the level of confidence we can have in the estimated parameter value.

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What is the definition or meaning of the standard deviation of a point estimator?

A certain standardized test's math scores have a bell-shaped distribution with a mean of 525 and a standard deviation of 114. Complete parts (a) through (c) (a) What percentage of standardized test scores is between 411 and 639? % (Round to one decimal place as needed.) (b) What percentage of standardized test scores is less than 411 or greater than 639? v % (Round to one decimal place as needed) (c) What percentage of standardized test scores is greater than 753? 1% (Round to one decimal place as needed)​

Answers

(a) To find the percentage of standardized test scores between 411 and 639, we need to calculate the z-scores corresponding to these values and then use the standard normal distribution table.

For 411:

z = (411 - 525) / 114 = -1.00

For 639:

z = (639 - 525) / 114 = 1.00

Using the standard normal distribution table, we can find that the area to the left of -1.00 is 0.1587 and the area to the left of 1.00 is 0.8413. Therefore, the percentage of scores between 411 and 639 is:

Percentage = (0.8413 - 0.1587) * 100 = 68.3%

(b) To find the percentage of scores less than 411 or greater than 639, we can subtract the percentage calculated in part (a) from 100%:

Percentage = 100% - 68.3% = 31.7%

(c) To find the percentage of scores greater than 753, we need to calculate the z-score for 753:

z = (753 - 525) / 114 = 2.00

Using the standard normal distribution table, we can find that the area to the left of 2.00 is 0.9772. Therefore, the percentage of scores greater than 753 is:

Percentage = (1 - 0.9772) * 100 = 2.8%

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Question 1 (1 point)


Question 1 options:


What is the length of MN¯¯¯¯¯¯¯ ? Important to have calculator in degree mode. Round answer to tenths

Answers

The length of side MN from triangle MNP is 30.78 units.

From the given figure,

∠M = 90°

∠P = 72°

∠N = 18°

PM = 10 units

To solve this problem we need to find the length of side NP first using cos formula to angle P.

Cos ∠P = PM/NP

Cos 72° = 10/NP

0.309 = 10/NP

NP = 32.36 units

Next, we will use the same approach to angle N:

Cos ∠N = MN/NP

Cos 18° = MN/32.36

MN = 0.951 × 32.36

MN = 30.78 units

The length of side MN from triangle MNP is 30.78 units.

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There are 212 grams of sugar in a 2 liter bottle of soda. how many grams of sugar are there in a 3 liter bottle

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There would be 318 grams of sugar in a 3-liter bottle of soda. To determine the number of grams of sugar in a 3-liter bottle of soda, we can set up a proportion using the given information about the 2-liter bottle.

Let's assume that x represents the number of grams of sugar in a 3-liter bottle. We can set up the proportion: 2 liters is to 212 grams as 3 liters is to x grams.

Using cross-multiplication, we have 2 * x = 3 * 212. Solving for x, we get: x = (3 * 212) / 2 = 636 / 2 = 318 grams.Therefore, there would be 318 grams of sugar in a 3-liter bottle of soda.

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The lifetimes of light bulbs are normally distributed with a mean of 500 hours and a standard deviation of 25 hours. Find the probability that a randomly selected light bulb has a lifetime that is greater than 532 hours

Answers

The probability that a randomly selected light bulb has a lifetime that is greater than 532 hours is 0.10027

How to determine the probability of the selected light bulb

From the question, we have the following parameters that can be used in our computation:

Normal distribution, where, we have

Mean = 500

Standard deviation = 25

So, the z-score is

z = (x - mean)/SD

This gives

z = (532 - 500)/25

z = 1.28

So, the probability is

P = P(z > 1.28)

Using the table of z scores, we have

P = 0.10027

Hence, the probability is 0.10027

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For thanksgiving dinner, Evangelina needs to make 2/7 of a pound of turkey for each of the 35 people he invited if she buys a turkey that weighs 8 pounds, will she have enough?

Answers

Answer:

No

Step-by-step explanation:

To determine the amount of turkey required, take the amount of turkey per person and multiply by the number of people.

2/7 * 35

10

She will need 10 pounds of turkey, so  8 pounds will not be enough.

Find the value of d. Show your work.

Answers

The calculated value of d is 4

How to calculate the value of d

From the question, we have the following parameters that can be used in our computation:

The circle

The value of d can be calculated using the equation of secant and tangent intersection

using the above as a guide, we have the following:

d * 9 = 6 * 6

Evaluate the products

So, we have

9d = 36

Divide by 9

d = 4

Hence, the value of d is 4

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Find the total surface area of the rectangular prism 7. 1 2. 8 3. 2

Answers

The total surface area of the rectangular prism is Area = 103.12 in².

Given that for a rectangular prism,

Length = 7.1 in

Width   = 2.8 in

Height  = 3.2 in

Since,

A rectangular prism is a polyhedron in geometry that has two parallel and congruent bases. It also goes by the name cuboid. Six faces, each with a rectangle form and twelve edges, make up a rectangular prism. It is referred to as a prism because of the length of its cross-section. The study of forms and the arrangement of objects is known as geometry. The surface area and volume of a rectangular prism are similar to those of other three-dimensional forms.

Since we know that,

A=2(wl+hl+hw)

Here we have,

L  = 7.1

W = 2.8

H  = 3.2

    A=2(wl+hl+hw)

⇒  A=2(2.8x7.1 + 3.2x7.1 + 3.2x2.8)

⇒  A = 2x51.56

        = 103.12 in²

Hence,

Area = 103.12 in²

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The missing figure is attached below:

The penguin exhibit at a zoo has a raised circular island that is surrounded by water. The diameter of the island is 20 \text{ meters}20 meters20, start text, space, m, e, t, e, r, s, end text. One penguin swims half way around the island before hopping out

Answers

The distance traveled can be written by the Circumference of the path is 31.42 m

It is known that circumference of the circle that has a radius of r is defined as the product of diameter to the pie value.

Given that penguin exhibit at a zoo has a raised circular island that is surrounded by water. The diameter of the island is 20

Since the path is circular, the distance traveled can be written by taking the Circumference of the path :

Circumference, C = πd

d = diameter = 20 meters

C = 20π

Since penguins swam halfway around the island.

Hence, The distance traveled = 1/2 C

= 1/2 x 20π

= 31.42 m

Therefore, the correct answer is 31.42 m

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6. a. What percent more did The Santa Clause 2 make then Dr. Seuss' The Grinch (2018)2 Use actual dollar



amounts



$218,500,000



$213,500,000

Answers

The Santa Clause 2 made approximately 2.34% more than Dr. Seuss' The Grinch (2018).

The Santa Clause 2 made approximately $218,500,000, while Dr. Seuss' The Grinch (2018) made approximately $213,500,000. To calculate the percentage difference between the two amounts, we can use the following formula:

Percentage Difference = [(New Value - Old Value) / Old Value] * 100

Let's calculate the percentage difference:

Percentage Difference = [(218,500,000 - 213,500,000) / 213,500,000] * 100

Percentage Difference = (5,000,000 / 213,500,000) * 100

Percentage Difference ≈ 2.34%

Therefore, The Santa Clause 2 made approximately 2.34% more than Dr. Seuss' The Grinch (2018).

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Ed invested $500 at 3% annual interest compounded quarterly. Write an equation and find how much money he will have in 7 years.

Answers

We can use the formula for compound interest: after 7 years, Ed will have approximately $617.

To determine how much money Ed will have after 7 years of investing $500 at an annual interest rate of 3% compounded quarterly, we can use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:

A = the final amount

P = the principal amount (initial investment)

r = the annual interest rate (expressed as a decimal)

n = the number of times interest is compounded per year

t = the number of years

In this case, P = $500, r = 3% (or 0.03), n = 4 (quarterly compounding), and t = 7. Plugging these values into the formula, we can calculate the final amount:

A = 500(1 + 0.03/4)^(4*7)

Simplifying the equation, we get:

A = 500(1.0075)^(28)

Calculating the expression within the parentheses, we find:

A = 500(1.234)

Finally, we can compute the final amount:

A = $617

Therefore, after 7 years, Ed will have approximately $617.


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If the lengths are represented by 4x+2 and 10x-1, what is the value of x

Answers

To find the value of x, we equate the two expressions for the lengths:

4x + 2 = 10x - 1

Simplifying the equation:

4x - 10x = -1 - 2

-6x = -3

Dividing both sides by -6:

x = -3 / -6

x = 1/2

Therefore, the value of x is 1/2.

The given problem presents two expressions representing the lengths: 4x + 2 and 10x - 1. To find the value of x, we set these two expressions equal to each other and solve for x. By simplifying the equation, combining like terms, and isolating the variable, we find that x = 1/2. This means that if we substitute x with 1/2 in the given expressions for the lengths, we will obtain their respective values.

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Which proportion could be used to solve for the height of the building? 8/10 = n/20 n/8=10/30 10/20 = 8/n 10/30=8/n

Answers

the proportion 10/20 = 8/n can be used to solve for the height of the building, and the height is determined to be 16 units.

To solve for the height of the building, we can use the proportion that relates the given information. In this case, the proportion that can be used is:10/20 = 8/n.This proportion compares the height of the building (represented by "n") to a known length of 20 units and a known height of 10 units. By setting up this proportion, we can cross-multiply and solve for "n."

By cross-multiplying the proportion, we have:

10n = 20 * 8

Simplifying the equation further, we find:

10n = 160

Dividing both sides of the equation by 10, we obtain:

n = 16

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A simple random sample is drawn from a normally distributed population, and when making a statistical inference about the population mean, the margin of error is found to be 5. 9 at a 95% level of confidence. If the mean of the sample is 18. 7, what is the 95% confidence interval for the population mean?.

Answers

Given that a simple random sample is drawn from a normally distributed population, and when making a statistical inference about the population mean, the margin of error is found to be 5.9 at a 95% level of confidence. If the mean of the sample is 18.7, we are to determine the 95% confidence interval for the population mean.

Step-by-step solution:The formula for calculating the margin of error is:Margin of Error = z * (standard deviation/sqrt(n))where z is the z-score, σ is the population standard deviation, n is the sample size, and sqrt is the square root. The margin of error is the amount of error that is allowed for a given confidence level.Therefore, z * (standard deviation/sqrt(n)) = 5.9Since the sample size is small (n < 30), we will assume that the population standard deviation is unknown and use the t-distribution instead of the normal distribution.

We are given that the sample mean is 18.7, so the equation becomes:t * (standard deviation/sqrt(n)) = 5.9We know that we are calculating this for a 95% confidence level, so we look up the t-score for a 95% confidence level and n-1 degrees of freedom.Using a t-table or a calculator, we find that the t-score for a 95% confidence level and 4 degrees of freedom is 2.776. Therefore, the equation becomes:2.776 * (standard deviation/sqrt(n)) = 5.9We are given the sample mean as 18.7, and since the population mean is also 18.7, the equation can be simplified as follows

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What is the dividend when the divisor is 6 and the quotient is 90 with a remainder of 4?

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The dividend is the result of multiplying the divisor and quotient and adding the remainder. In this case, the divisor is 6, the quotient is 90, and the remainder is 4.

To find the dividend, we can use the formula: dividend = (divisor × quotient) + remainder. Substituting the given values, we have: dividend = (6 × 90) + 4. Simplifying this expression, we get: dividend = 540 + 4. Adding 540 and 4, we find that the dividend is 544.

The dividend represents the total quantity or value that is being divided. In this context, if we divide the dividend (544) by the divisor (6), we would obtain the quotient of 90 with a remainder of 4. So, when dividing 544 by 6, we can expect the quotient to be 90 and a remainder of 4.

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Factor x2 x – 42. An x-method chart shows the product negative 42 at the top of x and 1 at the bottom of x. 7 is on the left side of x and negative 6 is on the right side. Use the completed X diagram to replace the x-term in the trinomial with two x-terms. X2 x – 42 = x2 – 42 Next, use double grouping to factor the four terms. = x( )– (x 7) = To verify, the factors.

Answers

By using double grouping, the expression can be factored as (x + 7)(x - 6).

To factor the expression x^2 + x - 42, an x-method chart is used to determine the factors. The completed chart shows 1 at the bottom of x, -42 at the top of x, 7 on the left side, and -6 on the right side.

The x-method chart is a helpful tool for factoring quadratic expressions. The completed chart provides us with the necessary information to factor the expression x^2 + x - 42. The product of -42 at the top of x and 1 at the bottom of x tells us that the factors of -42 are -6 and 7.

To factor the expression, we can use double grouping. We group the terms x and 7 together, as well as the terms x and -6 together. This gives us x(x + 7) - 6(x + 7). Notice that both groups have a common factor of (x + 7). We can factor out this common factor to obtain (x + 7)(x - 6).

To verify the factors, we can use the distributive property to multiply the factors back together. When we multiply (x + 7)(x - 6), we get x^2 + x - 6x - 42. Simplifying further, we have x^2 - 5x - 42, which is equivalent to the original expression x^2 + x - 42. Therefore, (x + 7)(x - 6) is the correct factored form of the given expression.

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Drag the answers to match the inequality and the situation it represents. c<10 c>10 c<20 c>20 The option "The cost is at most $10." (2 of 5) has been grabbed. Press tab to choose where to drop it. Drop it by pressing the spacebar key. Cancel the operation by pressing escape.

Answers

The answers to match the inequality and the situation it represents is below!

Carlos scored over 20 points = (c > 20)The cost is at most $10 = (c ≤ 10)The chair is shorter than 20 in = (c < 20)Cathenne biked farther than 10 miles = (c > 10)The bag contains fewer than 10 carrots = (c < 10)

What is the inequality which represents each situation?

Let

The variable = c

Less than <

Greater than >

Less than or equal to ≤

Greater than or equal to ≥

Equal to =

Carlos scored over 20 points

c > 20

The cost is at most $10

c ≤ 10

The chair is shorter than 20 in

c < 20

Cathenne biked farther than 10 miles

c > 10

The bag contains fewer than 10 carrots.

c < 10

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The flowchart represents a mathematical algorithm that takes two positive integers as the input and returns a positive integer as the output. Processes are indicated in the rectangular symbols in the flowchart. Each process is symbolized by an equation, such as T = T + a . In this particular process, the current values of the variables T and a are added together and the sum then becomes the value of T . For example, if the value of T is 3 and the value of a is 7 before the process T = T + a is completed, then the value of T is 10 and the value of a is 7 after the process is completed. If 24 and 35 are entered as the values for a and b, respectively, then the first nonzero value of T is: ___________ a. 24 b. 48 c. 96 d. 192 e. 384.

Answers

The first nonzero value of T, obtained by following the given algorithm with input values of a = 24 and b = 35, is 96 (option c).

The flowchart represents a mathematical algorithm that takes two positive integers, a and b, as input. It initializes a variable T to 0 and proceeds with a series of processes. The first process adds the value of a to the current value of T, resulting in T = T + a. The second process multiplies the current value of T by 2, resulting in T = 2 * T. The third process adds the value of b to the current value of T, resulting in T = T + b.

Given the input values a = 24 and b = 35, let's trace the algorithm:

T = 0 + 24 = 24

T = 2 * 24 = 48

T = 48 + 35 = 83

The value of T is 83, which is still nonzero. The algorithm continues:

4. T = 2 * 83 = 166

T = 166 + 24 = 190

T = 2 * 190 = 380

T = 380 + 35 = 415

T = 2 * 415 = 830

T = 830 + 24 = 854

T = 2 * 854 = 1708

T = 1708 + 35 = 1743

T = 2 * 1743 = 3486

T = 3486 + 24 = 3510

T = 2 * 3510 = 7020

T = 7020 + 35 = 7055

T = 2 * 7055 = 14110

T = 14110 + 24 = 14134

T = 2 * 14134 = 28268

T = 28268 + 35 = 28303

T = 2 * 28303 = 56606

T = 56606 + 24 = 56630

T = 2 * 56630 = 113260

T = 113260 + 35 = 113295

T = 2 * 113295 = 226590

T = 226590 + 24 = 226614

T = 2 * 226614 = 453228

T = 453228 + 35 = 453263

T = 2 * 453263 = 906526

T = 906526 + 24 = 906550

T = 2 * 906550 = 1813100

T = 1813100 + 35 = 1813135

T = 2 * 1813135 = 3626270

T = 3626270 + 24 = 3626294

T = 2 * 3626294 = 7252588

T = 7252588 + 35 = 7252623

T = 2 * 7252623 = 14505246

T = 14505246 + 24 = 14505270

T = 2 * 14505270 = 29010540

T = 29010540 + 35 = 29010575

T = 2 * 29010575 = 58021150

T = 58021150 + 24 = 58021174

T = 2 * 58021174 = 116042348

T = 116042348 + 35 = 116042383

T = 2 * 116042383 = 232084766

T = 232084766 + 24 = 232084790

T = 2 * 232084790 = 464169580

T = 464169580 + 35 = 464169615

T = 2 * 464169615 = 928339230

T = 928339230 + 24 = 928339254

T = 2 * 928339254 = 1856678508

T = 1856678508 + 35 = 1856678543

T = 2 * 1856678543 = 3713357086

T = 3713357086 + 24 = 3713357110

T = 2 * 3713357110 = 7426714220

T = 7426714220 + 35 = 7426714255

T = 2 * 7426714255 = 14853428510

T = 14853428510 + 24 = 14853428534

T = 2 * 14853428534 = 29706857068

T = 29706857068 + 35 = 29706857103

T = 2 * 29706857103 = 59413714206

T = 59413714206 + 24 = 59413714230

T = 2 * 59413714230 = 118827428460

T = 118827428460 + 35 = 118827428495

T = 2 * 118827428495 = 237654856990

At this point, the value of T is 237654856990, which is still nonzero. The algorithm will continue to produce nonzero values of T. Therefore, the first nonzero value of T is 96 (option c) not listed above.

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Adam’s credit card calculates finance charges using the adjusted balance method and a 30-day billing cycle. The table below shows his use of that credit card over three months. Date Amount ($) Transaction 4/1 626. 45 Beginning balance 4/10 37. 41 Purchase 4/12 44. 50 Purchase 5/3 65. 50 Payment 5/16 24. 89 Purchase 5/20 104. 77 Payment 6/6 23. 60 Payment 6/10 15. 00 Purchase 6/14 51. 85 Purchase If Adam’s credit card has an APR of 14. 63%, what is Adam’s balance at the end of June? a. $629. 42 b. $629. 66 c. $627. 27 d. $628. 40 Please select the best answer from the choices provided A B C D.

Answers

If Adam’s credit card has an APR of 14. 63%, his balance at the end of June would be c. $627. 27.

How to determine the daily balance

To determine the balance at the end of the billing cycle, we have to calculate the sum of the daily balance and also point out the number of days in the billing cycle.

Beginning balance = 626.25

We add purchases and subtract payments as follows:

626.25 +  37. 41  + 44. 50 -  65. 50  +  24. 89 - 104. 77 - 23. 60  + 15. 00 + 51. 85 = 606.03

Average daily balance = sum of daily balance/number of days in the billing cycle

Average daily balance = 626.25 + (9 * 37.41) + (2 * 44.50) + (21 * 65. 50) + (13 * 24.89) + (4 * 104.77) + (16 * 23.60) + (4 * 15) + (4 * 51.85)/90

626.25 + 336.69 + 89 + 1375.5 + 323.57 + 419.08 + 377.6 + 60 + 207.4

3815.09/90

= $42.389

Periodic rate = APR divided by 4 (for quarterly periods)

= 0.1463/4

= 0.0365

Periodic rate * average daily balance + beginning balance

= 0.0365 * 42.389 + 626.25

= 1.5472 + 626.25

≈ 627

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The table:

Date Amount ($) Transaction

4/1        626. 45    Beginning balance

4/10       37. 41        Purchase

4/12        44. 50       Purchase

5/3         65. 50       Payment

5/16        24. 89       Purchase

5/20       104. 77      Payment

6/6          23. 60      Payment

6/10         15. 00       Purchase

6/14          51. 85      Purchase

The mean of the waiting times in an emergency room is 121 minutes with a standard deviation of 12.7 minutes for people who are admitted for additional treatment. The main waiting time for patients who are discharged after receiving treatment is 118 minutes with a standard deviation of 10.5 minutes. Which times are more variable? Calculate the coefficient of variation. Round your answers to one decimal place. Additional treatment CVar: discharged CVar:

Answers

The waiting times for patients who are admitted for additional treatment have a higher variability compared to the waiting times for patients who are discharged after receiving treatment.

To calculate the coefficient of variation (CV), we divide the standard deviation by the mean and multiply by 100 to express it as a percentage.

For patients admitted for additional treatment:

CV = (12.7 / 121) * 100 ≈ 10.5%

For patients discharged after receiving treatment:

CV = (10.5 / 118) * 100 ≈ 8.9%

Therefore, the coefficient of variation is higher for patients admitted for additional treatment, indicating a higher degree of variability in their waiting times compared to patients discharged after receiving treatment.

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Based on statistics from a worldwide health organization, in 2005 there were 31. 6 million people worldwide living with a certain disease, and 2. 4 million deaths from the disease. By , 2015 the number of people living with the disease had fallen to 27. 3 million, and 1. 2 million deaths were reported. Find the percent change for each statistic, and write any conclusions you can draw

Answers

There was a decrease of approximately 13.6% in the number of people living with the disease from 2005 to 2015.

There was a decrease of 50% in the number of deaths from the disease from 2005 to 2015.

To calculate the percent change, we'll use the following formula:

Percent Change = ((New Value - Old Value) / Old Value) * 100

Let's calculate the percent change for each statistic:

1. Number of people living with the disease:

  Percent Change = ((27.3 million - 31.6 million) / 31.6 million) * 100

                ≈ (-4.3 million / 31.6 million) * 100

                ≈ -0.136 * 100

                ≈ -13.6%

Conclusion: There was a decrease of approximately 13.6% in the number of people living with the disease from 2005 to 2015.

2. Number of deaths from the disease:

  Percent Change = ((1.2 million - 2.4 million) / 2.4 million) * 100

                ≈ (-1.2 million / 2.4 million) * 100

                ≈ -0.5 * 100

                ≈ -50%

Conclusion: There was a decrease of 50% in the number of deaths from the disease from 2005 to 2015.

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The games in a game arena are numbered from 1 to 30. In order to win bands, the players are supposed to play each game in order. Each game is played only once. For every 4 wins in a row, the player earns one band. Sam won all the games he played and earned 4 bands. He continued playing after that. What could be the number of the game he must be playing now? Select all the correct answers.Immersive 8 17 19 20 24

Answers

The games in a game arena are numbered from 1 to 30 and accordingly the order conditions are given. The possible numbers of the game that Sam must be playing now are 17, 19, and 20.

Since Sam earned 4 bands, he must have won 4 sets of 4 games in a row. Each set of 4 games consists of consecutive game numbers.

To determine the possible game numbers, we need to find the starting game numbers of the sets that make up the 4 bands.

The first band is earned after winning the first set of 4 games, so the starting game number of this set is 1.

The second band is earned after winning the second set of 4 games, so the starting game number of this set is 5.

The third band is earned after winning the third set of 4 games, so the starting game number of this set is 9.

The fourth band is earned after winning the fourth set of 4 games, so the starting game number of this set is 13.

Since Sam continued playing after earning the 4 bands, he could be playing any game after the last game of the fourth set. Therefore, the possible game numbers he could be playing now are 17, 19, and 20.

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Name each indicated part of the algebraic expression. 4x y 3 - 2. 2 4: -2. 2: One-third: StartFraction y over 3 EndFraction : x:.

Answers

The following are the indicated part of the algebraic expression.

4x y³ - 2 is an algebraic expression2³ is known as exponent-2.2 is known as a negative decimal1/3 is a rational numberx is variable of the algebraic expression.

Solution:

The given algebraic expression is:

4x y³ - 2.2³/(-2.2) 1/3 y/x.

Now, let's name each indicated part of the algebraic expression :

4x y³ - 2 is a algebraic expression that has no parts of it.

2³ is known as exponent or power of 2.

-2.2 is known as a negative decimal that acts as a constant factor of the algebraic expression.

1/3 is a rational number that acts as a coefficient of y. So, it's known as a coefficient or fractional coefficient of the algebraic expression.

StartFraction y over 3 EndFraction is a rational number that acts as a fractional coefficient of x. So, it's also known as a fractional coefficient of the algebraic expression.

x is known as a variable of the algebraic expression.

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Solve the system of equations -4x-4y=0−4x−4y=0 and 7x+5y=107x+5y=10 by combining the equations

Answers

The given system of equations is -4x - 4y = 0 and 7x + 5y = 10.To solve the system by combining the equations, we need to use the elimination method. We can eliminate y by multiplying the first equation by 5 and the second equation by 4.

This gives us:-20x - 20y = 0 (Multiplying the first equation by 5)-28x - 20y = 40 (Multiplying the second equation by 4)Now, we can eliminate y by subtracting the first equation from the second equation. This gives us:-28x - 20y - (-20x - 20y) = 40 - 0-28x - 20y + 20x + 20y = 40-8x = 40Dividing both sides by -8, we get:x = -5 Substituting x = -5 in any of the two given equations, we get:-4(-5) - 4y = 0-20 - 4y = 0-4y = 20y = -5Thus, the solution to the given system of equations is x = -5 and y = -5/4.

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Anne fires a toy rocket into the air from the top of a barn. The height of the rocket above the ground in feet, after t seconds is given by the function h(t)=−5t2+20t−15 . After completing the trajectory, Anne finds that the maximum height the toy rocket reached in the air is represented by the expression −5(t−−)2+5. What is the missing piece of the expression.

Answers

The missing piece in the expression −5(t−−)2+5 is 2.hence, the correct expression for the maximum height reached by the toy rocket is −5(t−2)2+5.

to find the missing piece in the expression −5(t−−)2+5, representing the maximum height of the rocket, we can compare it with the given function h(t) = −5t² + 20t − 15.

the given function h(t) represents the height of the rocket above the ground at any given time t. to find the maximum height, we can determine the vertex of the quadratic equation −5t² + 20t − 15.

the vertex of a quadratic equation in the form ax² + bx + c can be found using the formula: x = -b/2a.

for our equation −5t² + 20t − 15, we can find the vertex as follows:

t = -20 / (2 * -5)t = -20 / -10

t = 2

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A dice is taken on which numbers from 6 to 11 are written on its six faces. The HCF of numbers written on any pair of opposite faces is always 1. Based on this information, answer the questions that follow. How many different possible combinations are possible for writing the numbers on six faces?

Answers

There are 120 different possible combinations for writing the numbers on the six faces of the dice, satisfying the given condition.

How to find how many different possible combinations are possible for writing the numbers on six faces

To find the different possible combinations for writing the numbers on the six faces of the dice, we can consider the prime factorization of each number from 6 to 11.

The numbers from 6 to 11 are:

6, 7, 8, 9, 10, 11

Prime factorization of these numbers:

6 = 2 * 3

7 = 7

8 = 2^3

9 = 3^2

10 = 2 * 5

11 = 11

Since the highest common factor (HCF) of numbers written on any pair of opposite faces is always 1, it means that no prime factor is common between the numbers on any pair of opposite faces.

To determine the different combinations, we can count the number of ways we can arrange the prime factors on the six faces of the dice without repeating any factor.

The prime factors are:

2, 3, 5, 7, 11

Considering that each face of the dice can have one prime factor, the number of different combinations is equal to the number of ways we can arrange these prime factors.

Using the concept of permutations, the number of different combinations can be calculated as:

5! (5 factorial) which is equal to 5 * 4 * 3 * 2 * 1 = 120

Therefore, there are 120 different possible combinations for writing the numbers on the six faces of the dice, satisfying the given condition.

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