Final answer:
After calculating Matthew's total earnings ($72) and subtracting the taxes (16% of $72, which is $11.52), the money left should be $60.48. This suggests an error in the provided options as none of them match the calculated amount.
Step-by-step explanation:
Matthew worked 8 hours at $9 an hour. First, calculate his total earnings by multiplying the hours worked by the hourly rate:
Total earnings = Hours worked × Hourly rate = 8 hours × $9/hour = $72
Next, calculate the taxes by converting the tax rate to decimal form and multiplying it by the total earnings:
Taxes = Total earnings × Tax rate = $72 × 0.16 = $11.52
Then, calculate the amount of money left after taxes:
Money left = Total earnings - Taxes = $72 - $11.52 = $60.48
However, since this amount is not one of the provided options, it's important to double-check our calculations and the provided options. Upon re-evaluation, we recognize that the actual amount after taxes suiting the provided options would be:
Money left (corrected) = Total earnings - Taxes = $72 - (16% of $72)
Taxes (corrected) = 16% of $72 = 0.16 × $72 = $11.52
— hence, the money left, which is $72 - $11.52, is indeed $60.48, which suggests a possible error in the provided options or the question parameters.