The sales tax rate is given to be 5%.
If one magazine costs $4.95, then the cost of the two magazines will be:
[tex]\Rightarrow4.95\times2=\$9.90[/tex]5% of $9.90 can be calculated to be:
[tex]\Rightarrow\frac{5}{100}\times9.90=0.495\approx0.50[/tex]The sales tax amount is approximately $0.50.