20. A train traveled 240 kilometers at a certain speed. When the engine was replaced by an improved model, the speed was increased by 20 km/h and the travel time for the trip was decreased by 1 hour.
What was the rate of each engine?

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.

Which value of c would make he following expression completely factored? 8x+cy

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?