Math question: simple interest math questions: 1-4?

1. May 3, 2010 , James negotiated a short term loan of $ 685,000. The loan is due to the October 1, 2010 , and a 6.86% interest rate . Use ordinary interest to calculate interest . What is the total amount paid in James expiration date ? MedlinePlus MedlinePlus 2. Mike has $ 500 in a savings account earning 0.45% interest . It is considering the purchase of a 1 - year certiicate or deposit ( CD ) that pays 3.25% interest . What will be the annual diffenence interest earnings from savings accounts and CDs . MedlinePlus MedlinePlus 3. In September wnet 14 Tim Park Bank a loan of $ 2,500 in 11 3/4 interest . Tim plans to repay the loan on January 27 . Suppose that the loan is in the common interest . What interest should Tim on January 27 ? What is the total amount of Tim must pay when due ? MedlinePlus MedlinePlus 4. Pat went to his bank to find out how long it will take for $ 1,000 to $ 1,700 is equivalent to a 12% simple interest . Can you solve the problem of Pat ? Some time in years to nearest tenth .