a boy sitting on a platform 7.5m high he observes that the angle of elevation of the top of the opposite building is 40°.the platform is 37.5m away from the building .find the height of the building

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.