Solve the Problem $240 \mathrm { ft }$ High with an Initial Velocity Of

Multiple Choice

Solve the problem.
-A coin is tossed upward from a balcony $240 \mathrm { ft }$ high with an initial velocity of $48 \mathrm { ft } / \mathrm { sec }$ . During what interval of time will the coin be at a height of at least $80 \mathrm { ft }$ ?
$\left( h = - 16 t ^ { 2 } + v _ { 0 } t + h _ { 0 } \right)$

A) $0 \leq t \leq 1$
B) $0 \leq t \leq 5$
C) $5 \leq t \leq 10$
D) $4 \leq t \leq 5$