Final answer:
The customer paid $20 for a purchase of $4.59. The change she will receive is calculated by subtracting the purchase amount from the amount paid, which results in $15.41.
Step-by-step explanation:
The customer's purchase was $4.59, and she paid with a $20 bill. To find out how much change she should receive, subtract the total purchase amount from the amount paid:
Change received = Amount paid - Purchase amount
Change received = $20.00 - $4.59 = $15.41
Therefore, the customer will receive $15.41 in change.