PLEASE HELP IM BEING TIMED AND DONT GET IT

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

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

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.