please solve all questions.

14. Michael wants his $3.200 to grow to $4.500 in 3 years. He has a savings account paying simple interest on savings. What rate of interest would help him achieve his goal? 15. If Michael can only get 95 % interest on his savings, how long will he have to wait to get his needed $4.500? 16. Suppose that Michael was able to add $300 to his deposit of $3.200 and was willing to wait 6 months past the 3 years to reach his goal of getting 54.500. What interest rate would he need to make his goal come true? 17. Find the exact and approximate time between October 2, 2010 and June 15. 2011. 18. Find the amount of simple interest on $2,100 from September 2, 2010 to June 15, 2011 using the banker's rule. 19. Find the amount of interest on $3,000 at 7% for 50 days using both ordinary and exact interest