h=4+63t-16t2 h is the height and f is the seconds..how many seconds will it take to hit the ground?

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h=4+63t-16t2 h is the height and f is the seconds..how many seconds will it take to hit the ground?

Mathematics
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solve the quadratic..... you may need the general quadratic formula.... and take the positive solution, (time can't be negative) and you should get at t=4 the object will hit the ground
when it hits the ground, h=0. so, as @campbell_st said, you need to solve:\[4+63t-16t^2=0\]
okay thank you so much

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