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.) The parametric equations for the path of the projectile are x = (450 cos 70°)t, and y = (450 sin 70°)t - 16t2.
A. 21.3 sec
B. 18 sec
C. 9.8 sec
D. 13.2 sec
Answer: D
Mathematics
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