simple interest rate

Q1-Molly invested $600 in her savings account for a period of six months. If saving account was offering her simple interest rate of 2.20% p.m.

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a. The maturity of her investment?

b. The interest she earned at the end of the time period ?

Q2-Samantha loaned $300,000 to a small business at 8.25% compounded semi-annually for 3 year and 4 months.

a. How much would the business have to repay Samantha at the end of the period?

b. How much interest did Samantha earn from this investment?