<u><em>Explanation:</em></u> Multiply as 7.86 and 4.6 ignoring the decimals for now. You get a solution of 36156. You count how many decimal points are in the problem (2 from 7.86 and 1 from 4.6) and you put it in the answer by moving the decimal to the left the amount of decimals in the problem this leave the answer as 36.156</span></span>
16 ft because the perimeter is 15 ft and perimeter is length times width. The only number that you can multiply by 5 to get 15 is 3 and perimeter is all sides added up. You add up 5+5+3+3 to get 16 ft.