Find the simple interest
1: $640,3%,2years
2: $1500,4.25%,4years
3: $580,2%6months
4: $1200,3.9%,8months
5: $4500,9%,3.5years
6: question 6 (1 point)
6. $290, 12.5%, 6 months
7: leon charged $75 at an interest rate of 12.5%. how much will leon have to payafter one month if he makes no payments?
8: jamerra received a $3,000 car loan. she plans on paying off the loan in 2 years. at the end of 2 year, jamerra will have paid $450 in interest. what is the simple interest rate of the ar loan?
9: pablo has $4,200 to invest for college.

a.) if pablo invests $4,200 for 3 years and earns $630, what is the simple interest rate?

b.) pablos's goal is to have $5,000 after 4 years. is this possible if he invests with a rate of return of 6%?