Answer:
1. Estimated Distance = 15.5 miles
Actual Distance = 14.5 miles
[tex]\text{Error percentage = }\frac{Estimated distance - Actual distance}{Actual Distance}\times 100\\\\\text{Error Percentage = }6.9\%[/tex]
2. Price of the wallet = $31.95
Sales tax = 7.5%
Total Cost = Price of the wallet + Sales tax
Total Cost = 31.95 + 0.075 × 31.95
So, Total cost of the wallet = $34.35
3. Total Monthly sales = $4125
Commission made = $165
[tex]\text{Commission as percentage = }\frac{\text{commission made}}{\text{Total sales}}\times 100\\\\\implies \text{Commission as a percentage = }4\%[/tex]
4. Principal = $12000
Time = 3 years
Rate of interest = 15%
= 0.15
Simple Interest = Principal × Rate × Time
Simple Interest = 12000 × 0.15 × 3
Simple Interest = $5400
