23 = w/3 i just need help on a couple of questions

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.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left