Question

Help? Please. Thanks???

Answer 1

The height is represented by d.

d = 10 feet

`10 = - 16 {t}^(2) - 7t + 61 \\ 0 = - 16 {t}^(2) - 7t + 51`

Use quadratic formula:

t = 1.58, -2.02 (reject)

1.58 seconds