Amy has $1,000 in a savings account at the beginning of the fall. she wants to have at least $500 in the account by the end of the fall. she withdraws $100 a week for living expenses. write an inequality for the number of weeks amy can withdraw money, and solve a) 1000 - 100w ≤ 500; w ≥ 6 b) 1000 + 100w ≤ 500; w ≤ 5 c) 1000 + 100w ≥ 500; w ≥ 6 d) 1000 - 100w ≥ 500; w ≤ 5