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OpenStudy (anonymous):
The height h of an arrow in feet is modeled by h(t) = -16t2 + 63t + 4, where t is the time in seconds since the arrow was shot. How long is the arrow in the air? _____ s. Enter a number only.
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hero (hero):
We will only know how long it was in the air once it hits the ground. So let \(h = 0\) and solve for \(t\)
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