13,200 ft. = how many miles?!?!?!?!?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

If f(x)=x^2- 4 and g(x)=x^2 plus 2 x, (c) (f-/3) = ? (simplify your answer.)

Thomas buys a cardboard sheet that is 8 by 12 inches. let x be the side length of each cutout. what is the size of the cutout he needs to make so that he can fit the most marbles in the box?