Kal practices lines for 28 minutes at his acting class. This is 70% of the entire acting class. How many minutes long is his acting class?

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

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?

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240