While working on a roof, Rob dropped his hammer. The hamer's fall can be represented by the equation h=-16t^2+20 (where t=time in seconds and h=height in feet) How long will it take the hammer to reach the ground?

It will take 1.12 seconds for the hammer to reach the ground.

Step-by-step explanation:

The height of the hammer after t seconds is given by the following equation:

How long will it take the hammer to reach the ground?

This is t for which h(t) = 0. So

Time is a positive measure, so

It will take 1.12 seconds for the hammer to reach the ground.

step-by-step explanation:

if you meant, "on the way from (3, 2) to (3, 14):

x does not change; y increases by 12.

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