Twelve books cost $59.88 and 21 books cost $104.79. Is there is a constant of proportionality between these purchases?

Given the graphed function below which of the following orders pairs are found on the inverse function

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?

Select all of the following expressions that are equal to 2.5.