4.1 by the power of 2

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?