$4.00 each. There is a 10% discount there is also a 6% sales tax after. what is the cost of the toothbrush? Round to the nearest penny.

Question

The beginng is there are toothbrushed which are $4.00 each

Answer 1

You state "sales tax after" so I assume they apply the 10% discount first,

and then add the 6% sales tax

 

If we apply a 10% discount we pay 90% of the price:  0.9(4.00) = $3.60

Apply a 6% tax to 3.60 we pay 106% of 3.60 or 1.06(3.60) = 3.816

 

To the nearest penny we pay $3.82