Let's calculate the interest for each scenario:
1. A $1200 loan for 7 months at 5% simple interest.
To calculate the interest, we use the formula: Interest = Principal × Rate × Time
Principal = $1200
Rate = 5% = 0.05 (decimal form)
Time = 7 months = 7/12 years (since the rate is annual)
Interest = $1200 × 0.05 × 7/12 = $35
2. An $8000 loan for 4 years at 12.5% simple interest.
Principal = $8000
Rate = 12.5% = 0.125 (decimal form)
Time = 4 years
Interest = $8000 × 0.125 × 4 = $4000
3. A $500 loan for 99 days at 10% simple interest.
Principal = $500
Rate = 10% = 0.10 (decimal form)
Time = 99 days = 99/365 years (since the rate is annual)
Interest = $500 × 0.10 × 99/365 = $13.56 (rounded to the nearest cent)
4. A $750 loan for 15 weeks at 13.25% simple interest.
Principal = $750
Rate = 13.25% = 0.1325 (decimal form)
Time = 15 weeks = 15/52 years (since the rate is annual)
Interest = $750 × 0.1325 × 15/52 = $34.45 (rounded to the nearest cent)
Please note that these calculations assume simple interest, which means the interest is not compounded over time. Also, depending on your context, there might be additional fees or charges associated with the loans that are not accounted for in these calculations.