Final answer:
To estimate the amount Gerardo owes on her credit card, you can find the midpoint between $35 and $45 which is $40.
Step-by-step explanation:
If Gerardo owes between $35 and $45 on her credit card, we can estimate how much she owes by finding the midpoint of the range, which is a common method for estimating within a given interval.
To find the midpoint, you simply average the two given numbers.
- In this case, to estimate the amount Gerardo owes, you would add $35 and $45 to get $80, and then divide by 2, which results in $40.
Therefore, the estimated amount Gerardo owes on her credit card is $40.