4. If the sales tax is \( 7 \% \), how much tax will you pay on a CD that costs \( \$ 15 \) ? 5. In Smallville, 2,400 out of 20,000 workers are unemployed. In Biatown. 6750 ?

**4. Calculating the Sales Tax** The sales tax for a CD that costs \( \$15 \) at a rate of \( 7\% \) is calculated by multiplying the cost by the tax rate: \[ \text{Tax} = 15 \times 0.07 = 1.05 \] So, the tax paid on this CD is \( \$1.05 \). --- **5. Calculating the Unemployment Rate** For Smallville, there are 2,400 unemployed workers out of a total of 20,000 workers. The unemployment rate is given by \[ \text{Unemployment Rate} = \frac{\text{Number of unemployed}}{\text{Total number of workers}} \times 100\% \] Substituting the given values: \[ \text{Unemployment Rate}_{\text{Smallville}} = \frac{2400}{20000} \times 100\% = 12\% \] For Biatown the problem statement only provides the number "6750" without specifying the total number of workers. Without knowing how many workers there are in Biatown, we cannot compute the unemployment rate there. If additional information becomes available (for example, the total number of workers), the unemployment rate would be calculated using the same formula: \[ \text{Unemployment Rate}_{\text{Biatown}} = \frac{6750}{\text{Total Workers in Biatown}} \times 100\% \] As it stands, the unemployment rate in Biatown cannot be determined with the given data.