Final answer:
To find the total cost of the car including a 3% sales tax, convert the tax rate to a decimal (0.03) and multiply it by the car's price ($28,000). The sales tax is $840, which makes the total cost of the car $28,840.
Step-by-step explanation:
To calculate the total cost of purchasing a car with a 3% local sales tax, we first need to convert the sales tax rate from a percentage to a decimal. The conversion is done by dividing the percentage by 100, so 3% becomes 0.03. Next, we need to calculate the amount of sales tax by multiplying the car's price by the decimal sales tax rate.
Sales Tax = Car Price × Sales Tax Rate
Sales Tax = $28,000 × 0.03
Sales Tax = $840
Once we have the sales tax amount, we add it to the original cost of the car to get the total cost.
Total Cost = Car Price + Sales Tax
Total Cost = $28,000 + $840
Total Cost = $28,840
Therefore, the total cost of the car, including the 3% sales tax, is $28,840.