Martin is exercising on a treadmill. The speed of the treadmill is set at exactly 4 miles per hour. If he continues running at this speed, how long will it take Martin to run 28 miles?

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.