John took 600mg of a medicine. Each hour, the amount of medicine in his body decreases by about 25%. Which function represents the amount of medicine in johns body after x hours A. f(x)=600(0.75)^x

B. f(x)=600-25x

C. f(x)=600(0.25)^x

D. f(x)=600-75x

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in