Answer: 6%
Step-by-step explanation:
Given
Price of shirt is [tex]x[/tex] dollars
Shirt gets a discount and then a tax on purchase.
Final price is [tex]1.06(x-0.4x)[/tex]
In the above expression [tex]x-0.4x[/tex] represents the discount on the shirt which is equivalent to 40%.
The above expression is multiplied with 1.06, which indicates a sales tax of 6% as 6% can be written as 0.06.
Thus, the sales tax is 6%.
