The price before tax is $4.50 and the tax is %10, then the tax is
[tex]\begin{gathered} \text{tax}=4.50\times\frac{10}{100} \\ \text{tax}=0.45 \end{gathered}[/tex]then, the total price is the sum of the tax and the price before the tax, that is,
[tex]\begin{gathered} \text{total price}=4.50+0.45 \\ \text{total price = 4.95} \end{gathered}[/tex]then, the total price is $4.95 and the tax is $0.45