<span>At the end of a full year (360 days), the note will have a total value of (15000 * 1.06), or $15,900. This gives an interest amount of $900. Dividing this by 12 months gives the per-month rate. (900 / 12) = $75, which would be the amount of interest accrued by December 31 on this note.</span>
The angle for a straight line is 180 degrees. So, to find x, you must subtract the angle given from the angle from the straight line to get 180-151=29 degrees.