A rectangle has a length of 12 millimeters and a width of 17 millimeters.What is the effect on the perimeter when the dimensions are multiplied by 12? a. The perimeter is increased by a factor of 12.b. The perimeter is increased by a factor of 48.c. The perimeter is increased by a factor of 144.d. The perimeter is increased by a factor of 576.

ok so original perimeter = 12 +12 + 17 +17 = 58 mm
if dimensions are multiplied by 12:12*12 = 144 and 17*12 = 204 new perimeter = 144 +144 +204 +204 = 696 mm
696 / 58 = 12
so the perimeter increased by a factor of 12, answer is A