Name: SAT Math Help & School Math Mastery
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#14884

functions

applications

quadratic equations

hard

120 sec

A toy rocket is launched vertically from the ground. It reaches a maximum height of $80$ meters at $4$ seconds after launch and hits the ground at $9$ seconds. Which equation represents the height above ground $h$ , in meters, of the rocket $t$ seconds after it is launched?

A.

$h = - 3.2 (t - 4)^{2} + 80$

B.

$h = - 3.2 (t - 80)^{2} + 4$

C.

$h = - 16 (t - 4)^{2} + 80$

D.

$h = - 16 (t - 9)^{2}$