Mathematics, 18.09.2019 04:20 QueenNerdy889

38. (a) how much work is done lifting a 60 pound chair from the ground to the top of a 20 foot
building with a cable which weighs 1 pound per foot?
(b) how much work is done lifting the same chair from the ground to a height of 5 feet with the same
cable?
39. (a) how much work is done lifting a 10 pound calculus book from the ground to the top of a 30 foot
building with a cable which weighs 2 pounds per foot?
(b) from the ground to a height of 10 feet? (c) from a height of 10 feet to a height of 20 feet?
40. how much work is done lifting an 80 pound injured child to the top of a 20 foot hole using a stretcher
weighing 14 pounds and a cable which weighs 1 pound per foot?
42. how much work is done lifting an 120 pound injured adult to the top of a 30 foot hole using a stretcher
weighing 10 pounds and a cable which weighs 2 pound per foot?

Answers: 1

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 19:00

What is not true about kl and mn? what is mn? (show )

Answers: 2

Answer

Mathematics, 21.06.2019 19:40

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Answers: 1

Answer

Mathematics, 22.06.2019 01:00

You went to a restaurant and spent $53.25 on the meal. there was a 6% sales tax. what was the amount of money, not including a tip, you spent at the restaurant?

Answers: 1

Answer

Mathematics, 22.06.2019 01:10

|p| > 3 {-3, 3} {p|-3 < p < 3} {p|p < -3 or p > 3}

Answers: 2

Answer

You know the right answer?

38. (a) how much work is done lifting a 60 pound chair from the ground to the top of a 20 foot
...

Questions

Mathematics, 12.02.2021 23:20

Tanner scored 12 more points than Jason in a basketball game if p represents the number of points that Jason scored which expression represents the nu...