Question

?

Answer 1

you are given a and r, find an

Answer 2

an=30(1/2)^n-1

Answer 3

good

n is a variable used to indicate the term #

"4th term" implies n = 4

Answer 4

an=30(1/2)^4-1

Answer 5

7/8

Answer 6

have to be very careful with parentheses

an=30(1/2)^(4-1)

Answer 7

15/4

Answer 8

good (idk if they prefer 15/4 or 3.75)