Help me please I don’t understand

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

10% of 1,900,000. show me how you got the answer

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?