Gey who weighs 500 newtons is late for class. it takes her 7.5 seconds to run up two flights of stairs, a total of 8 meters. how much power does gerry expend inher run upstairs?

Explanation:

Power is the ratio of work to time.

Work is the product of force and displacement.

         Work = Force x Displacement

           W = F x s

            W = 500 x 8 = 4000 J

Power expended by Gerry expend in her running upstairs is 533.33 Hz

i think the answer is b

d. air pressure decreases as altitude increases.