Which shows the expression below in simplified form? (5 × 10^5) × (7 × 10^-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.

Solve the equation by completing the square. x^2+2x=17

Find the value of x. give reasons to justify your solutions! l, m ∈ kn