Answer: She will spend $72.00 in interest.
Explanation:
First, we have to evaluate the numbers we have.
Principal: $800
Interest Rate: 4.5%
Time in years: 2 years
Interest earned/spent: ?
So, we have to find the interest spent.
Now, we have to calculate the formula.
800 x .045 x 2 = $72
Rounded to the nearest whole number/in dollars(money): $72.00
So, Annika's older cousin will spend $72.00 dollars in interest. :]