If a seller quotes a discount of 10% on paint priced at $6.35 per gallon, what is the actual payment per gallon?

To determine the actual payment per gallon after applying a 10% discount on paint priced at $6.35, you first need to calculate the amount of the discount.

A 10% discount means you reduce the original price by 10% of that amount. So, first, calculate 10% of $6.35:

10% of $6.35 = 0.10 × $6.35 = $0.635.

Next, subtract the discount from the original price to find the final price:

$6.35 - $0.635 = $5.715.

When rounding to the nearest cent, $5.715 becomes $5.72.

Thus, the actual payment per gallon, after applying a 10% discount, is $5.72. This is why the answer is correct, as it accurately reflects the final cost after applying the discount to the original price of the paint.