Question

hii

Answer 1

part A just substitute v = 50 and s = 90 into the equation.

Part B.... the max height will occur on the line of symmetry

to so find the line of symmetry

given \[f(t) = at^2 + bt + c\]

id found using

\[t = \frac{-b}{2 \times a}\]

in your question you have a = -16 and b = 50

so then substitute this t value into the equation to get the max height.

hope it helps