Question

aA weather balloon is released and rises vertically such that its distance s(t) above the ground during the first 10 seconds of flight is given by s(t) = 6 + 2t + t^2, where s(t) is in feet and t is in second. Find the velocity of the balloon at the instant the balloon is 50 ft above the ground

Answer 1

6+2t+t^2=50
t^2+2t-44=0