:p a rectangle has a width of 3 cm and a length of 10 cm. what is the effect on the perimeter when the dimensions are multiplied by 10? a) the perimeter is increased by a factor of 10. b) the perimeter is increased by a factor of 40. c) the perimeter is increased by a factor of 100. d) the perimeter is increased by a factor of 400. i think it's 'a'.. but would really appreciate if someone else double checked it cause i'm an idiot and exhausted and can't think.