Solve the Problem $80 \mathrm{ft} / \mathrm{sec}$ Its Height (In Feet) After

Multiple Choice

Solve the problem.
-A ball is thrown vertically upward at an initial speed of $80 \mathrm{ft} / \mathrm{sec}$ . Its height (in feet) after $t$ seconds is given by
$$h(t) =t(80-16 t)$$
What is the maximum height attained by the ball?

A) 200 feet
B) 88.9 feet
C) 100 feet
D) 133.3 feet