help me please

Question

A daredevil fires himself from a cannon directly upwards with an initial velocity of 44 m/s. How high will the daredevil go before beginning to fall. (Round to the tenths place)

Answer 1

h(t) = -4.9t² + 44t

 

Maximum h occurs at the vertex of the height-vs.-time parabola, which is at

 

t = -44/[2(-4.9)] seconds = ? seconds

 

Evaluate h(t) at this value of t to get maximum height.