Step-by-step explanation:
The note was issued on May 1, so the company will have held the note for 8 months by December 31. The annual interest rate is 10%, so the monthly interest rate is 10% / 12 = 0.8333%. The interest expense for the year ending December 31 is therefore $150,000 x 0.8333% x 8 = $9,999.99, which can be rounded to $10,000.