The function s(t) gives the distance (in miles) in terms of time (hours). If the average rate of change of s(t) on 0 ≤ t ≤ 4 is 70 mph, what is the average rate of change of 1/2 s(t) on this interval?

Answer 1

s(4) - s(0) / 4 = 70

s(4) - s(0) = 280

(1/2)(s(4) - s(0) = 140

140/4 = 35