When a certain drug is administered to a patient, the number of milligrams remaining in the patient's bloodstream after t hours is D(t) = 60e^-0.15t
a. How many milligrams of the drug is administered to the patient initially?
b. How many milligrams of the drug remain in the patient in the patient's
bloodstream after 3 hours?
c. Draw a graph of D(t)? (graphing paper)

This is about circle theorems. someone asap : (

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y