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Mathematics 8 Online
OpenStudy (happykiddo):

A rock falls from a cliff meters above the ground. The equation h=125-5t^2 represents the height of the rock after seconds. How many seconds does it take for the rock to land on the ground?

OpenStudy (happykiddo):

OpenStudy (anonymous):

5 sec

OpenStudy (anonymous):

h=120 , 105 , 80 , 45 , 0

OpenStudy (happykiddo):

where did h=120 , 105 , 80 , 45 , 0 come from

OpenStudy (anonymous):

t=1,2,3,4,5

OpenStudy (anonymous):

h=125-5.125-20,...

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