What is each of the expression written using each base only once? 10^10 x 10^10

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

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

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca