Calculate the number of gallons of paint needed to cover the walls of a room 11'x12'x8'. each gallon covers 300 square feet

No. of gallons required = csa of cuboid+area of rectangle/300
                                     = 2(l+b)h + l*b /300
                                     = 2(11+12)8 +11 *12 /300
                                     =368+132/300
                                     = 500/300
                                     =5/3  =1.666 =1.7
                                     = 2 approx.
therefore  2 gallons should be used

Aquadratic function is one of the form f(x)=ax2 + bx + c l, where a,b, and c are numbers with are not equal to zero.