The duration of routine operations in a certain hospital has approximately a normal distribution with an
average of 120 minutes and a standard deviation of 18 minutes. What percentage of operations last longer
than 138 minutes?

Answers

Answer 1

Answer:  The percentage of operations last longer  than 138 minutes =15.87%

Step-by-step explanation:

Let x denotes the duration of routine operations in a certain hospital.

Given: The duration of routine operations has approximately a normal distribution with [tex]\mu[/tex] = 120 minutes and [tex]\sigma=[/tex] 18 minutes.

The probability that operations last longer  than 138 minutes = [tex]P(X>138)[/tex]

[tex]=P(\dfrac{X-\mu}{\sigma}>\dfrac{138-120}{18})\\\\=P(Z>1)\ \ \ [Z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Z<1)\\\\=1- 0.8413\\\\=0.1587[/tex]

The percentage of operations last longer  than 138 minutes =15.87%


Related Questions

Pls answer this needs to be turned in at 3:00 pm today

Answers

it is 14m^2. you can figure this out just by taking areas of the figures separately and adding!

Find the value of x ​

Answers

Answer:

x=19.78

Step-by-step explanation:

Given triangle:

P=2.0

h=5.9

[tex]sin x=\frac{2.0}{5.9} \\sin x=0.338\\x= sin ^-10.338\\x=19.78^0[/tex]

Lara planted some seeds. For every 3 seeds Lara planted, only 2 seeds grew. Altogether, 12 seeds grew. How many seeds did Lara plant?

Answers

18 seeds!! hope this helps.
1/2 of 12 = 6
6 x 3 = 18 seeds

Help me pls
this is very important

Answers

Answer:

C/3rd one. (y=2x+4)

Step-by-step explanation:

In the equation y=mx+b, m=slope of the line and b=y-intercept. From the graph, we know the y-intercept is 4 so we can write y=mx+4. To find the slope: (0-4)/(-2-0) = (-4)/(-2) = 2. We can replace the m with 2 to get the final equation of y=2x+4 which is also the third answer.

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Which point represents the outlier in the scatter plot?
OA (2,4)
OB. (5, 10)
OC. (9, 10)
OD. (10,9)

Answers

Answer:

(10,9) is the outlier in the scatter graph

The outlier in the scatter plot is (10, 9).

Option D is the correct answer.

What is a scatterplot?

A scatterplot is a type of graphical display that is used to represent the relationship between two continuous variables.

In a scatterplot, each point represents the values of the two variables, with one variable being plotted along the x-axis and the other variable being plotted along the y-axis.

The position of each point on the graph represents the values of both variables for that particular observation.

We have,

In a scatterplot, an outlier is a data point that lies far away from the other data points in the plot.

Outliers can be identified as data points that are much higher or lower than the majority of the data points, and they can be seen as points that are separated from the other data points in the plot.

We see that,

Point (10, 9) lies far away from the rest of the points in the scatterplot.

Thus,

The outlier in the scatter plot is (10, 9).

Learn more about scatterplots here:

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MARKING BRAINLIEST HELP PLS

Answers

Answer:

R(x) = 3.5x

Step-by-step explanation:

In economics, formula for total revenue is;

Total revenue = quantity sold × price.

In this question;

Let he quantity of drinks sold be x

We are told that the selling price is $3.50 per drinks

Since quantity is "x", then total revenue can be said to be R(x)

Thus;

Total revenue; R(x) = x × 3.50

R(x) = 3.5x

Again, I’m too lazy to do this but if you could help, thanks.

The length of a rectangle is seven less than twice the length of its width, if the area of the rectangle is 15 square meters, find the dimensions of the rectangle.

Answers

hi! the width is 5, and the length is 3. this one is easy because just find factors of 15 and plug them in!

Find the value of angle y

Answers

Answer:

116

Step-by-step explanation:

116 is parallel to y so that are the same its called corresponding angles

When a transversal cuts two parallel lines, the corresponding angles are equal.

In the given figure, the corresponding angles are 116° and y

So, they are equal

⇒   y = 116°

Juan has $10. He recently got a job and now makes $9.15 an hour. He now has $760.30. How many hours has he worked?

Answers

Answer:

760.30 - 10 = 750.30

750.30÷9.15=82

Step-by-step explanation:

Take what he have at the end subtract by what he had ad at the start to find how much he earned in total.

Then divide by the money earned per hour to find how many hours worked.

Determine whether the triangles are congruent. Explain your reasoning .
SAS (Side, Angle, Side) or ASA (Angle, Side, Angle)

Answers

Answer:

not congruent, they must have 3 equal sides and 3 equal angles. 72+38= 110, which means the last angle is 70°

Step-by-step explanation:

F qje hwuwihwgeiswwdvb7228✨✨

The adjacent sides of a rectangle are (2x – 1) and (x + 5). Find its area.

Answers

Answer:

2x²+9x-5

Step-by-step explanation:

Area of a rectangle = Length * Width

If the adjacent sides are 2x – 1) and (x + 5), the area is calculated as;

A = (2x – 1) * (x + 5).

A = 2x²+10x-x-5

A = 2x²+9x-5

Hence the area of the rectangle with the adjacent sides is  2x²+9x-5

Solve:
[tex] \frac{dy}{dx} = {x}^{3} + 5x - 18[/tex]

Answers

[tex]y = \frac{1}{4} {x}^{4} + \frac{5}{2} {x}^{2} - 18x + k[/tex]

Step-by-step explanation:

[tex]dy = ( {x}^{3} + 5x - 18)dx[/tex]

Integrating the above expression, we get

[tex]y = \int( {x}^{3} + 5x - 18)dx[/tex]

[tex] = \frac{1}{4} {x}^{4} + \frac{5}{2} {x}^{2} - 18x + k[/tex]

where k is the constant of integration

A plant 3 inches tall grows an average of 0.5 inches each month. Which equation models the heigh h after x months

Answers

Answer:H = 3 + 0.5x

Step-by-step explanation:

This would be H = 3 + 0.5x

Find the y-intercept of the quadratic function: g(x) = 5х2 + 9x + 4 о (0, 18) (4.0) ООО (0.4) (0,5)​

Answers

Answer:

(0,4)

Step-by-step explanation:

Here, we want to find the y-intercept of the quadratic function

g(x) = 5x^2 + 9x + 4

Mathematically, we know that the y-intercept is the position on the graph where we have x = 0

so, to find the y-intercept value, we have to find g(0)

simply put, we have to substitute the value of 0 for x

Mathematically, we have this as;

g(0) = 5(0)^2 + 9(0) + 4

g(0) = 0 + 0 + 4

g(0) = 4

thus, we have the y-intercept point as (0,4)

This is my last question I need to do what’s the answer

Answers

Step-by-step explanation:

According to the question,

l+5=2h

Find the greatest common factor of 28a^3 , 12a^4 and 26a^5

Answers

Answer:

2a³

Step-by-step explanation:

2a³ can divide all these without living a remainder

Which is equivalent to7^(3/2) over 7^(1/2)?

A. 7^(1/3)
B. 7^(3/4)
C. 7^1
D. 7^2
E. 7^3

Answers

the answer is c! you just subtract: 3/2-1/2, which is 1.

Given the expression below:

[tex] \large{ \frac{ {7}^{ \frac{3}{2} } }{ {7}^{ \frac{1}{2} } } }[/tex]

Use the following property:

[tex] \large \boxed{ {a}^{ \frac{m}{n} } = \sqrt[n]{ {a}^{m} } }[/tex]

Therefore:

[tex] \large{ \frac{ {7}^{ \frac{3}{2} } }{ {7}^{ \frac{1}{2} } } = \frac{ \sqrt{ {7}^{3} } }{ \sqrt{7} } } \\ \large{ \frac{ \sqrt{ {7}^{3} } }{ \sqrt{7} } = \frac{ \sqrt{7 \times 7 \times 7} }{ \sqrt{7} } \longrightarrow \frac{7 \sqrt{7} }{ \sqrt{7} } } \\ \large{ \frac{7 \cancel{ \sqrt{7} }}{ \cancel{ \sqrt{7} }} = 7}[/tex]

Note that a¹ = a. Therefore, 7¹ = 7.

Answer

7¹ or 7.

help me please i need help on this

Answers

Answer:

CE = 20

Step-by-step explanation:

Given a line parallel to a side of a triangle and intersecting the other 2 sides then it divides those sides proportionally, that is

[tex]\frac{6}{8}[/tex] = [tex]\frac{15}{CE}[/tex] ( cross- multiply )

6 CE = 120 ( divide both sides by 6 )

CE = 20

Corey is two times older than Brad. If the sum of their ages is 54, how old is Brad?

Answers

Answer:

Corey has to be 36 while Brad is 18

Step-by-step explanation:

The factors of 54 is 1,2,3,6,9,18,27, and 54.

i pulled 18 because it look like the key number. Corey is 2 times older than Brad, that means you add multiply 18 x 2. Then you get 36. Then u subtract 36 from 54 then you get Brads age :)

WILL GIVE BRAINLIEST!
3 Using SOH CAH TOA!
1 point
Find the missing side length,
1
16
23°
2
х
Type your answer...
Previous

Answers

X=14.72

Using cosine

monkeys at the zoo eat 4 cups of food every day .elephants eat 76 times as much what is the equation?

Answers

Answer:

304 cups daily

Step-by-step explanation:

4 cups of food (monkeys) multiplied by 76 (amount elephants eats more)

4 x 76

f(x)=-3x^2-20
find f(-9)

Answers

Answer: go to symbolab i swear it will help if not apologies

Step-by-step explanation:

Type the equation for the graph below.
please help!!!

Answers

Answer:

y = 1sin(3x)

Step-by-step explanation:

y = A sin( (2π/ω)x )

A is amplitude = 1

ω is period = 2π/3

------------------------------

y = 1sin( 2π / (2π/3) x)

y = 1sin(3x)

The equation for the graph with a sinusoidal wave, given an amplitude of 1, a period of 2π/3, and a phase shift of 0, is y = sin((2π/3)x).

The equation for a sinusoidal wave can be written as:

y = A * sin(ωx + φ)

In this case, we are given the values of amplitude (A = 1), period (ω = 2π/3), and phase shift (φ = 0).

The amplitude (A) represents the maximum displacement or height of the wave from the center line. In this case, it is 1.

The period (ω) represents the length of one complete cycle of the wave. The period is the reciprocal of the frequency, and in this case, it is 2π/3.

The phase shift (φ) represents any horizontal displacement of the wave. In this case, the phase shift is 0, indicating that the wave starts at its equilibrium position.

Using these values, the equation for the given graph would be:

y = 1 * sin((2π/3)x + 0)

Simplifying it further:

y = sin((2π/3)x)

To learn more about equation click on,

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I NEED HELP PLEASE UHHH PLEASE I NEED HELP UUUUHHHHHHH
Sulio wants to build a wooden fence to enclose his vegetable garden. Determine the amount of fencing he needs by finding the perimeter of the garden.

Perimeter = 2 times length + 2 times width. The length of a garden is 8 feet and the width is 6 feet.

Evaluate the formula for the perimeter of a parallelogram to solve the problem. Then check all that apply.
First, write the formula for the perimeter of a parallelogram, P = 2l + 2w.
Next, use parentheses when you substitute 8 for l and 6 for w.
After multiplying, add 16 and 12.
Sulio needs 28 feet of fencing.
Sulio needs 48 feet of fencing.

Answers

Answer:

Sulio needs 28 feet of fencing.

Step-by-step explanation:

P = 2l + 2w

P = 2(8) + 2(6)

P = 16 + 12

P = 28

Answer:

The answer is

First, write the formula for the perimeter of a parallelogram, P = 2l + 2w.

Next, use parentheses when you substitute 8 for l and 6 for w.

After multiplying, add 16 and 12.

Sulio needs 28 feet of fencing.

Step-by-step explanation:

this is your answer

If mABC=125 and mABD=94 then m DBC, somebody help!

Answers

Answer:

31 degrees

Step-by-step explanation:

Subtract 94 from 125 to get the measure of angle DBC.

2. Dado un número, la suma de su mitad, su doble y su triple es 55. ¿Qué número es?

Answers

Answer:

English

Step-by-step explanation:

can you speak English plzzz

we need that

Answer:

i dont speak taco ask again in english

Step-by-step explanation:

Two vertices of a right triangle have the coordinates (-2, 5) and (9, 5). What is the length of the side formed by these vertices?

Answers

Answer:

11 unit

Step-by-step explanation:

Applying,

s = √[(y₂-y₁)²+(x₂-x₁)²]...................... Equation 1

Where s = length of the side formed.

From the question,

Given: x₁ = -2, x₂ = 9, y₁ = 5, y₂ = 5

Substitute these values into equation 1

s = √[(9+2)²+(5-5)²]

s = √(11²)

s = 11 unit.

Hence the length of the side formed by the vertices is 11 unit

can you slve fasssst pls

Answers

Step-by-step explanation:

the value of x is 18 degree and the value of Y is 15 degree

find the area of the figure below

A.832in^2
B.768^2
C.416^2
D.384in^2

Answers

The area is the average of the 2 heights times the base, which is:
(24+16)/2*19.2=384 in^2=D

Help please! Someone!

Answers

Answer:

8

Step-by-step explanation:

Since AB is tangent to the circle, ABC is a 90 degree angle. Using either knowledge about special triangles (3-4-5) or the Pythagorean theorem, BC will equal 8.

Hope this helped.

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