2 + 7 = 4 + 1 (x ) − x 4 may give brainliest only IF your explain how you got your answer. And I will thank you and all that (15 points:))

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.