Most space vehicles are powered in part by radioactive isotopes.
The power output P, in watts, of a space vehicle can be modeled by the function
P(t) = Poe-0.0035t, where P, is the initial power supply and t is the number of days of
use. Suppose a satellite is launched with an initial power supply of 62.5 watts. How
many years would it take before the power supply reached 10 watts?
Answer the question using a graphing calculator. Then determine the growth rate or
decay rate of the function.