F(x) = x + 2 g(x) = x – 4 (f g)(x) =
2x – 2
x2 – 8
x2 – 2x – 8
x2 + 2x – 8

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?