Assume that the radius r of a sphere is expanding at a rate of 50 cm/min. determine the rate of change in surface area at t = 2 min, assuming that r = 20 at t = 0

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof