Final answer:
To calculate the interest using the ordinary interest method, multiply the principle, rate, and time together. The interest in this case is $168.49.
Step-by-step explanation:
To calculate the interest using the ordinary interest method, we first need to calculate the simple interest. The formula for simple interest is:
Interest = Principle * Rate * Time
In this case, the principle is $6,500, the rate is 6.5% (or 0.065), and the time is 150 days (or 150/365 years).
Substituting these values into the formula, we get:
Interest = $6,500 * 0.065 * (150/365)
Calculating this expression gives us a total interest of $168.49.