Abiology teacher has 15 milliliters of a salt solution that is 65% salt. how many milliliters of water must the teacher add to make a solution that is 25% salt?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

Which of the following will form the composite function?