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August 30, 2015

Homework Help: math

Posted by rmz on Monday, February 22, 2010 at 1:59pm.

the height, in feet, of a free-falling object t seconds after being dropped from an initial height s can be found using h=-16t^2+s. An object is dropped from a helicopter 784 feet above the ground. How long will it take the object to land on the ground?

how do you know where to put what??
a. 7s
b. 9s
c. 6s
d. 8.5s

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