Susan's elevation at the top of a mountain.

When amy exercises in her fitness center for 1 hr she burns a total of 475 calories.if she burns 9 calories a minute jogging on the treadmill and then burns 6.5 calories a minute pedaling on the stationary bicycle how many minutes of the hour does she spend exercising on the bicycle?

Compared with the cost of tuition, fees, and books for a traditional college course, the cost of a clep exam is:

What does the first stage of a multistage rocket do?