Help me pls, for number 19, I have absolutely no idea what I’m supposed to do.

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?

I’m stuck on this equation, anyone got the answer?

Which of the following is an example of conditional probability