Mathematics

2 October, 14:47

A projectile is fired straight up from ground level with an initial velocity of 112 ft/s. Its height, h, above the ground after t seconds is given by h = - 16t2 + 112t. What is the interval of time during which the projectile's height exceeds 192 feet? 3 < t <4 t 4 3> t > 4

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