First you want to find the surface area of one box SA=2(l*w)+2(h*l)+2(h*w) SA=2(12*12)+2(15*12)+2(15*12) SA=2(144)+2(180)+2(180) SA=288+360+360 SA=1008 cm² is for one box Multiply by 4 to get for 4 boxes 4*1008=4032 cm²
Y = 32.25 x + 40 If it takes 6 hours to repair a car: y = 32.25 * 6 + 40 = 193.5 + 40 = $233.50 The closest are $251.50 and $211.50. $251.50 - $233.50 = $18 $233.50 - $211.50 = $22 $18 < $22 Answer: The closest estimate is A ) $251.50
