Final answer:
To calculate Mack's change, subtract the total purchase cost of $14.35 from his payment of $20.00, which results in Mack receiving $5.65 in change.
Step-by-step explanation:
To determine how much change Mack should get back when he pays for his $14.35 purchase with $20.00, we perform a subtraction operation. We take Mack's payment and subtract the total cost of the purchases.
The calculation is as follows:
- Payment amount: $20.00
- Total purchase cost: $14.35
- Change due: $20.00 - $14.35
By subtracting the purchase total from the payment amount, we find that Mack's charge is $5.65.
Therefore, Mack should receive $5.65 in change.