Question 65811
Let M be the measure of feet and t be the time.
Then M is proportional to t.
==> M = Kt where 'K' is the constant of proportionality.
Given M = 96 when t = 4
==> 96 = 4K
==> 96/4 = K
==> K = 24
So the equation would be 

M = 24t

Now when t = 12,
M = 24*12
==> M = 288

Thus it would take 288 ft for 12 seconds.


Good Luck!!!