Solve the Problem. -A Projectile Is Fired with an Initial Velocity of 450

Multiple Choice

Solve the problem.
-A projectile is fired with an initial velocity of 450 feet per second at an angle of 70° with the horizontal. In how many seconds will the projectile reach its maximum altitude? (Round your
Answer to the nearest tenth of a second.)

A) 21.3 sec
B) 9.8 sec
C) 18 sec
D) 13.2 sec