The area of a rectangular region is 7.26 x 10^3square feet. The length of the rectangular region is 1.21 x 102 feet. How much does it cost to surround the region with a border that costs $0.80 per foot?

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125