HELP ASAP Given the function

f (x) = 4( 1/2)^x

1. Is this a growth or decay function?
2. What is this function's growth or decay factor?
3. What is this function's initial value?

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?