To calculate the tax deduction Manuel paid for that week, you can use the formula:
\[ \text{Tax Deduction} = \text{Earnings} \times \text{Tax Rate} \]
In this case, Manuel's earnings are $639 and the tax rate is 9.84%, which can be expressed as a decimal (0.0984) for the calculation.
Now plug in the values:
\[ \text{Tax Deduction} = 639 \times 0.0984 \]
Calculating that:
\[ \text{Tax Deduction} = 639 \times 0.0984 \approx 62.9036 \]
Rounding to two decimal places, the tax deduction Manuel paid for that week is approximately:
\[ \text{Tax Deduction} \approx 62.90 \]
So, Manuel paid approximately $62.90 in tax deductions for that week.