Solving percent problems 1.45% of 70 2.33% of 28 3.125% of 70 4.12 is 40% of what number? 5. 4 is 80% of what number? 6.7.5% of what number is equal to 270? 7.380 is what percent of 456?

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x