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Marsai saved 800. Over the course of 2 years, Marsai ended up earning an additional 128 in interest. What was the simple interest rate of the loan?Tiffany's Fashion stores are having a 30% OFF sale. Susan sees a dress on sale for 140. How much did it cost last week before the sale?Joey is 20 years younger than Becky. In two years, Becky will be twice as old as JoeyA video camera that regularly sells for 900 is on sale for 20% off th regular price. What is the sales price?If 5,000 is borrowed with an interest of 12.3% compounded semi-annually, what is the total amount of money needed to pay it back in 3 years?