Using proportions, we have that:
A. The tax on the video game is of $1.62 more than on the book.
B. Her total bill would be of $98.55.
<h3>What is a
proportion?</h3>
A proportion is a fraction of total amount.
Item A:
The total amount is the prices, while the fraction is the sales tax of 6%.
The price of a book is of $12.99, hence the sales tax is of:
0.06 x 12.99 = $0.78
The price of a video game is of $39.99, hence the sales tax is of:
0.06 x 39.99 = $2.40
$2.40 - $0.78 = $1.62.
The tax on the video game is of $1.62 more than on the book.
Item B:
The total price is of:
12.99 + 2 x 39.99 = $92.97
Considering the sales tax, the total bill is 106% of that, hence:
1.06 x 92.97 = $98.55.
Her total bill would be of $98.55.
You can learn more about proportions at brainly.com/question/24372153
