Question 281587
The fromula s= 16t^2 is used to approximate the distance s, in feet, that an object falls freely (from rest) in t seconds. Use thid formula to solve the problem. ( Round to the nearest tenth. A man drops his keys off a building 1420 ft. high. How long does it take the keys, falling freely, to hit the ground?
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{{{1420 = 16t^2}}}
{{{t^2 = 88.75}}}
t =~ 9.42 seconds