Question 313120
The distance that an object will fall in t seconds varies directly with the square of t.
 An object falls 7 feet in 1 second. 
:
The equation; (d = distance)
7t^2 = d
How long to fall 112 ft?
7t^2 = 112
t^2 = {{{112/7}}}
t^2 = 16
t = {{{sqrt(16)}}}
t = 4 seconds