SOLUTION: when an object is dropped from a building, the height of the object above the ground is given by the formula h=-4.9x to the 2nd power + 44.1 where h is the meters and x is the time

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Question 1139766: when an object is dropped from a building, the height of the object above the ground is given by the formula h=-4.9x to the 2nd power + 44.1 where h is the meters and x is the time in seconds. How long does it take for the object to reach the ground
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.

h(t) = 


The object will hit the ground exactly and precisely at the time moment "t", when  h(t) = 0,  or, equivalently,


     = 0.


Simplify and solve for "t" :


     =  = 9

    t =  = 3.


ANSWER.  In 3 seconds.


Solved.

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