Answer:
A.
Step-by-step explanation:
if you simplify the equation on A., you'll get 1,000 as the number. Rapunzel's hair was approximately 1,000 times longer than it was 10 years ago.
$12.6 -- 25% of 12.6 is exactly $3.15
I did this by taking 3.15 / 0.25
I'm going to assume the rate, 3.9%, is for one year.
7550 * 3.9 * 6 = $176, 670 is the simple interest earned in 6 years with a rate of 3.9% per year.
Since you have the formula, why don't you do it yourself?