Final answer:
To calculate the interest expense on a note, the simple interest formula is used. After two months, the interest expense on a 9% note for $7,000 is $105, which is calculated by multiplying the principal by the interest rate and time period.
Step-by-step explanation:
The student is asking about calculating the interest expense on a 9% note for $7,000 after two months. To find the interest expense, we use the simple interest formula I = PRT, where I is the interest, P is the principal amount, R is the interest rate, and T is the time in years. The principal amount P is $7,000, the interest rate R is 9% (or 0.09), and the time T is two months (or 2/12 of a year).
First, we convert the monthly rate to an annual rate by dividing it by 12:
T = 2 months / 12 months = 1/6 year
Next, we calculate the interest:
I = $7,000 * 0.09 * 1/6
I = $7,000 * 0.015
I = $105
Therefore, the interest expense on the note after two months is $105 (option a).