Due to smoking, a terminally ill patient loses approximately 2% of his lung capacity every 1 mounth. at this rate, beginning at 100% capacity, what will the patient's lung capacity be in one year (12 mounths)? (remember, the formula of exponential decay is y = a(1-r)^x.)

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π