Final answer:
The couple will owe approximately $10.87 in interest to the bank.
Step-by-step explanation:
To calculate the interest owed on a short-term loan, you can use the formula:
Interest = Principal x Rate x Time
In this case, the principal is $1,000, the rate is 4.35% (or 0.0435), and the time is 90 days (or 0.25 years).
Plugging in these values into the formula, we have:
Interest = $1,000 x 0.0435 x 0.25 = $10.87
Therefore, the couple will owe approximately $10.87 in interest to the bank.