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Math·Advanced Math·Nonlinear functions

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An object reaches its maximum height of 70.56 feet, 2.1 seconds after it is launched. Which equation represents this model, where f(t) is the height t seconds after it was launched?

A

$f(t)=-16(t-2.1{)}^2+70.56$

B

$f(t)=16(t+2.1{)}^2+70.56$

C

$f(t)=-16(t+2.1{)}^2+70.56$

D

$f(t)=16(t-2.1{)}^2+70.56$