Selling price of a comic book: $1.70. Sales tax rate: 4%

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

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.