PLEASE HELP ME WITH THESE

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

Aline that intersects one of two parallel lines intersects the other also always sometimes never

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?