Question

The formula h = 120t - 16t
`^(2)` gives the height h in feet of an object t seconds after it is shot upward from Earth’s surface with an initial velocity of 120 ft per second. What will be the height of the object after 6 seconds?

Answer 1

C

Explanation:

So we have the function:

`h(t)=120t-16t^2`

Where h(t) measures the height after t seconds.

To find the height of the object after 6 seconds, substitute 6 for t. So:

`h(t)=120(6)-16(6)^2`

Evaluate. Square:

`h(t)=120(6)-16(36)`

Multiply:

`h(6)=720-576`

Subtract:

`h(6)=144`

So, the height after six seconds of the object is 144 ft.

Our answer is C.