An explosion causes debris to rise vertically with an initial speed of 88 feet per second. The formula h=-16t^2+88t describes the height of the debris above the ground, h, in feet, t seconds after the explosion. When will the debris be 40 feet above the ground? The debris will be 40 feet above the ground after____ seconds?

Algebra: Structure And Method, Book 1
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Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
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Section5.13: Using Factoring To Solve Problems
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An explosion causes debris to rise vertically with an initial speed of 88 feet per second. The formula h=-16t^2+88t describes the height of the debris above the ground, h, in feet, t seconds after the explosion. When will the debris be 40 feet above the ground?

The debris will be 40 feet above the ground after____ seconds?

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