Which formula can be used to find the nth term in a geometric sequence where a=3 and r=3
a) a=3+2(n-1)
b) a=3(n-1)+2
c) a= 3^(n-1)x2
d) a=3x2^(n-1)

What is best way to getting answer for my exam is

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

For the inequality |c| < |d| to be true, which of the following must be true?