Answer:
The answer is: A. ($38.40)
Explanation:
640 times 0.03 times 2
3% as a decimal is 0.03 because think of 100 whenever you see these numbers as percentages. So if you had 30% you would have 0.30 but 3 is only 0.03 so then you just multiply by the number of years which is 2. Hope this helps!!!