You find a vintage record at a garage sale for $12. you mark it up by 80% to sell it online. what will your customer pay for the record including 7% sales tax? (show work pls )

98 point question what is the record for most points in one

Someone me what is the area of this figure? 18m 18m 8m 16m

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.