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From the roof of the Empire State Building, you throw a coin up in the air...

From the roof of the Empire State Building, you throw a coin up in the air and then watch it fall down, down, down to the street. The height of the coin (in feet) after tt seconds is given by

h(t)=-16t^2+100t+1250h(t)=−16t2+100t+1250.

After 12.512.5 seconds, the coin hits the street. How fast is the coin moving when it hits the street?

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