The number of hours it takes to paint a house is inversely proportional to the number of people painting. If it takes 3 workers 17.7 hours to paint a certain house, how long would it take 5 workers? Round to one tenth of an hour.

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?