Can someone help with these questions and explain work

Name ! BAILL Business Math - Simple Interest Classwork* Please show all work for full credit . Equations : I = PRI and MV = P ( 1 + RT ) 1 . Find the simple interest on a $500 loan at 7% for 18 months . 2 . Find the simple interest on a $2500 loan at 6% for 36 months . 3 . Simple interest in the amount of $53.40 is earned for $890 invested for nine months . What was the simple interest rate ? Simple interest in the amount of $1500 is earned for a $6000 investment for 20 months . What was the simple interest rate ?" 5 . How long will it take to earn $350 interest on a $2000 investment at a 5% interest rate ?" 6 . How long will it take to earn $1600 interest on a $8000 investment at a 8% interest rate ?"7 . Find the maturity value on a loan of $1 620 at 8% simple interest for nine months . 8 . Find the maturity value on a loan of $4560 at 7% simple interest for eighteen months 9 . What is the ordinary interest on a loan for 60 days at 6% if the principal is $570 . 80 ? 10 . Find the exact interest on $675 at 10 1/4 % from March 28 to July 3