A Projectile Is Fired Straight Upward from the Ground Level $112$

question 66

Multiple Choice

A projectile is fired straight upward from the ground level with an initial velocity of $112$ feet per second, so that its height h at any time t is given by $h = - 16 t ^ { 2 } + 112 t$ , where h is measured in feet and t is measured in seconds. During what interval(s) of time with the height of the projectile exceed $160$ feet?

• A) \(( 2,5 )\)
• B) \(( 2,7 )\)
• C) \(( 5,7 )\)
• D) \(( 0,2 ) , ( 5,7 )\)
• E) \(( 1,7 )\)

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