Question 19 Satellite power. The power supply of a satellite is a radio- Not yet answered isotope (radioactive substance). The power output P, in watts (W), decreases at a rate proportional to the amount Marked out of 1.00 present; P is given by Flag question P = 50e-0.004t where t is the time, in days. a) How much power will be available after 375 days? Watts ( Give your answer to exactly 2 decimal places) (Give the numerical answer only)Question 20 Satellite power. The power supply of a satellite is a radio- Not yet answered isotope (radioactive substance). The power output P, in Marked out of 1.00 watts (W), decreases at a rate proportional to the amount present: P is given by Flag question P = 50e-0.004t where t is the time, in days. b) What is the half-life of the power supply? Select one: O a. 173.3 days b. 75.3 days O c. 183 days O d. 11 days