Final answer:
The total change in Mikayla's account balance after withdrawing $20 on 4 different days is $80, calculated by multiplying the withdrawal amount by the number of withdrawal days.
Step-by-step explanation:
To find the total change in Mikayla's account balance after the withdrawals, we need to perform a simple calculation. Mikayla withdraws $20 on 4 different days. Each withdrawal is a single transaction, and these transactions are independent of each other. Therefore, to find the total change, we multiply the amount withdrawn on one day by the number of days she made the withdrawals.
The calculation would be:
Total change = Amount withdrawn per day × Number of days
Total change = $20 × 4
Total change = $80
Thus, the total change in Mikayla's account balance after the withdrawals is $80.