Im to drunk to finish my hw due in an hr someone please help please tell me what letters are what numbers

In trapezoid bath, ah=19.7 and et=16.1. identify be.

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

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost