The width of a rectangle is 4t - 7.5 feet and the length is 7.5t + 10 feet. Find the perimeter of the rectangle.
The perimeter of the rectangle is _ feet.

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Which statement most accurately describe why the division property of exponents does not apply to the expression (-8)^2/(-3)^4