PLEASE HELP ALGEBRA 2!!

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15