Answer:
The amount of sales tax Joanna will pay is $3.323
Step-by-step explanation:
Given:
Cost of the backpack = $37.98
Sales tax = 8.75%
To Find:
Amount of sales tax that Joanna will pay = ?
Solution:
Sales tax imposed by the government on the goods that are sold or on the services that is provided. It is collected by the seller who sells the goods
Sales tax =
On Substituting the values
Sales tax = 
sales tax = 
sales tax = 3.323
If every shelf has the same amount of books, then it can be seen as proportional because one shelf has 43 and 2 have 86, and it keeps going up in a consistent way.
so 43/1 = 86/2 .
Happy studying ^-^