I need help with like 3 or 4 questions please help

The amount of energy it takes to lift a box might be a function of which of the following

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

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?