A projectile is fired straight up from ground level with an initial velocity of 256 ft per second, so that its height at any time t is given by h= -16t² + 256t where the height is measured in feet and the time t is measured in second. During what interval of time will the height of the projectile exceed 960 feet? A. 3 seconds < t < 20 seconds
B. 5 seconds < t < 12 seconds
C. 6 seconds < t < 10 seconds
D. 2 seconds < t < 30 seconds
w/ solution
B. 5 seconds < t < 12 seconds
C. 6 seconds < t < 10 seconds
D. 2 seconds < t < 30 seconds
w/ solution
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