15. Janet finds a sweater on sales for 20% off. The original price is $50.00. She has a coupon for an additional 25% off the sale price. What is the final cost of the sweater? A. $25.00

B. $27.50

C. $30.00

D. $37.50

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

If i have one apple and give you the apple, how many apples do i have?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.