Hi please help me with this asap.​

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

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.

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost