Final answer:
Mr. Jones paid $192 in sales tax for the used car, which was calculated by multiplying the total cost of the car ($2,400) by the sales tax rate (8%), converted to a decimal (0.08).
Step-by-step explanation:
To calculate the sales tax Mr. Jones paid for his used car, you first find the total cost of the car without tax, which is $2,400. Then you calculate the sales tax by converting the percentage to a decimal and multiplying it by the total cost of the car. An 8% sales tax rate means you convert 8% to 0.08, and then multiply $2,400 by 0.08 to find the sales tax amount.
Sales tax calculation: $2,400 × 0.08 = $192
Therefore, Mr. Jones paid $192 in sales tax for the used car.