F(x) = 72(1.25)x what does 1.25 mean

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

What is always true about a positive integer raised to a negative odd power?

Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?