Posted by **Sharon** on Wednesday, December 5, 2012 at 2:01pm.

A calculator was dropped at an equation of d= 0.5*9.8t^2 + 5t

How long would it take for the calculator to hit the ground? HINT: SET THE EQUATION TO ZERO.

- math - typo -
**Steve**, Wednesday, December 5, 2012 at 3:08pm
so, follow the hint

4.9t^2 + 5t = 0

t(4.9t+5)=0

a product is zero if either factor is zero.

Now, do you see a problem with your equation for d?

Hint: if t>0, d will never be 0.

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