A rocket lifts a payload upward from the surface of earth. The radius of earth is r, and the weight of the payload on the surface of earth is w. The force of earth’s gravity on the payload is w2 when the rocket’s distance from the center of earth is.

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?