Question 1198843
h(t) = -4.9t2+10.78t+1.071
The time is takes to reach maximum height is given by t = -b/2a = -10.78/(-2*4.9) = 1.1 s
a) h(1.1) = 7 m
b) The height of the person is the height at t = 0, h(0) = 1.071
c) The roundtrip time to return to the original height is 2*1.1 = 2.2 s