PLEASE HELP‼️‼️

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Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

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?