The document provides examples of simple interest rate calculations and questions. It defines the simple interest formula as I = Prt, where I is interest, P is principal, r is interest rate as a decimal, and t is time in years. It then gives examples of calculating interest for different principal amounts invested or borrowed at various rates and times. It omits questions 2b, 5, 6, and 8 from the set of exercises.

1. Simple things, like Interest

2. Gyan invests $5000 at a rate of 5.25% for
3 years. Calculate the amount of interest
Gyan has earned.
Simple Interest formula: I = P r t

3. Simple Interest formula: I = P r t
Where:
- I is the amount of interest
- P is the Principal amount invested or borrowed
- r is the rate of interest shown as a decimal
- t is time in years

5. Jen borrows $7000 at a rate of 18.5% for
3 months. Calculate the amount of interest Jen
will pay.

6. Goitom has $10000 to invest. If he can get
an interest rate of 7.75%, how long will it
take for him to earn $1200 interest?

7. Sayana is planning a trip to Disney world in 7
months. She has $5000, and has determined
the trip will cost her $6000. What interest rate
must she get to have save enough money for
her trip?

8. Exercise 44
Omit questions
2b, 5, 6, and 8