FOLLOW ME FOR CLEARING YOUR NEXT DOUBT
About seven inches. Pretty sure
Volume = Length x Width x Height
Length = 4 ft
Width = 4 ft
Height = 15 ft
Volume = 4 ft x 4 ft x 15 ft = 240 ft^3
SAS because you have 2 known side lengths and one angle!
(5x-12)^2
Square factor of 25 is 5.
Square factor of 144 is 12.
Hope this helps. I didn't understand what to do with it.