What do you mean by the ’4R principle’ to develop environment friendly habits?

Someone pls help . Thank you sm ! i forgot how to do this lol . If a sample emits 2000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 3 meters from the sample? Using the sample in above question how many counts per second would be observed when the detector is 10 meters away from the sample? What is the area of the polygon shown below? (in the image). A. 322 mm^2 B. 364 mm^2 C. 520 mm^2 D. 584 mm^2 Show all work please! Patrick graphed (shown below) the high temperatures (in C) that he experienced on each day of his trip toHomer, AlaskaWhat is the meaning of point A? What is the rule for the transformation below? What's the name for the part of Earth made of rock?A. GeosphereB. AtmosphereC. HydrosphereD. BiosphereSUBMIT How many milliliters of 7.10 M hydrobromic acid solution should be used to prepare 5.50 L of 0.400 M HBr The layer of the atmosphere that contains weather is the PLS HELP, IF I GET THIS BAD I LOSE THE YEAR, AND LOSE MY FRIENDS, PLS DONT PUT SOMETHING RANDOM Which sentence in this excerpt from Anton Chekhov's The Proposal best reveals the setting of the play? NATALYA STEPANOVNA: Well, there! It's you, and papa said, "Go; there's a merchant come for his goods." How do you do, Ivan Vassilevitch! LOMOV: How do you do, honoured Natalya Stepanovna? NATALYA STEPANOVNA: You must excuse my apron and nglig. . . . we're shelling peas for drying. Why haven't you been here for such a long time? Sit down. [They seat themselves] Won't you have some lunch? LOMOV: No, thank you, I've had some already. NATALYA STEPANOVNA: Then smoke. . . . Here are the matches. . . . The weather is splendid now, but yesterday it was so wet that the workmen didn't do anything all day. How much hay have you stacked? Just think, I felt greedy and had a whole field cut, and now I'm not at all pleased about it because I'm afraid my hay may rot. I ought to have waited a bit. But what's this? Why, you're in evening dress! Well, I never! Are you going to a ball, or what?though I must say you look better. Tell me, why are you got up like that? LOMOV: [Excited] You see, honoured Natalya Stepanovna . . . the fact is, I've made up my mind to ask you to hear me out. . . . Of course you'll be surprised and perhaps even angry, but a . . . [Aside] It's awfully cold! If a and b are acute angles such that tan (a+b)= 1.73 and tan(a-b) =1/1.73, find a and b pls help:Find all the missing elements: What the answer question During vacation we can visit Zion National Park, camp in a secluded spot, and fish in a stream. is the sentence parallel or not? ux=x+y/k, solve for x If someone runs a red light in front of you, and you choose NOT to slowdown or steer away, you willA. not be at fault if there is a collisionB. be partially at fault if there is a collisionC. have to appear in court if there is a collisionD. probably not be involved in a collision According to data from the U.S. Department of Education, the average cost y of tuition and fees at public four-year institutions in year x is approximated by the equation where x = 0 corresponds to 1990. If this model continues to be accurate, during what year will tuition and fees reach $4000? The following expression is a polynomial: 4x + 5y True False Write each expression using a positive exponent. ("/" means division)("^" means to the power of) 9^-4 You have to prepare a pH 3.65 buffer, and you have the following 0.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH3COONa, and NaH2PO4. How many mL of HCOOH and HCOONa would you use to make approximately a liter of the buffer? how many nitrogen atoms are in 18.8 g of barium nitride