Find the sum write your answer in simplest form 7/10 - 1/2

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

What is the measure of the smallest angle in the diagram? 15 29 32 45

9/10 divide by -3/15 as a mixed number