math
posted by jennifer .
The Grand Canyon
The time t (in seconds)that it takes for an object to fall a distance of s feet is given by the formula
t= radical symbol s/4
In some places, The Grand Canyon is one mile (5,280 feet) deep. How long would it take a stone dropped over the edge of the canyon to hit bottom?
please help

do you have a calculator?
find (√5280)/4
other option, just enter 5280^.5/4 into Google. 
i got
(5 280^.5) / 4 = 18.1659021
it the answer be 18 seconds? 
i got
(5 280^.5) / 4 = 18.1659021
is 18 seconds the answer?
thanks 
(5 280^.5) / 4 = 18.1659021

i got 18.1659021
is 18 sec. the answer? 
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