Which expression is equivalent to 1−2/3^−3 ?

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

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Ftara spends $219 a month for her car payment and she makes $3,200 a month, what percent of her monthly income is spent on her car payment?