Final question, solve this equation and show work! Worth 20 points

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

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.

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?