Question

Help with this question, ASAP!!

Answer 1

Option D). 171 feet is correct

Explanation:

Given that a toy rocket is launched from 42 feet above the ground.

The height is rocket is given by f(t)=
`-16t^(2) +91t+42`

To find the height of the rocket above the ground after 3seconds :

Given that f(0)=42

Take t=3

f(t)=
`-16t^(2) +91t+42`

f(3)=
`-16(3)^(2) +91(3)+42`

f(3)=
`-16(9) +91(3)+42`

f(3)=
`-144 +273+42`

f(3)=171 feet

Therefore, option D). 171 feet is correct