Mark bought a new video game priced at $49.99. a sales tax of 8% was added to his purchase. how much tax did mark pay?

The tax that Mark had to pay is calculated by multiplying the base price of the video game and the decimal equivalent of the tax percentage. That is,
                                         tax = ($49.99) x (0.08) 
                                               = $3.9992
Thus, Mark had to pay approximately $4 for the tax.