Question

Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answer 1

2.5

Explanation:

`h(t)=213 \\ \\ \implies -16t^2 +126t=213 \\ \\ 16t^2-126t+213=0 \\ \\ t=(-(-126) \pm √((-126)^2-4(16)(213)))/(2(16)) \\ \\ t \approx 2.46, 5.42`

If we consider the graph, since height can't be negative, we only consider the first root.