Mary is driving home from work and needs to make two stops. she first drives at a rate of 25 mph to the supermarket, which is 175 miles way from her work, and then she drives to her house, which is 80 miles away from the supermarket, at a rate of 40 mph. what was mary's average speed for the entire trip?

Arectangular prism is 3 meters long, 6 meters wide, and has a height of 9 meters. what is its surface area?

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Write the rational number in lowest terms 99/-15