Answer:
the first
Step-by-step explanation:
it just is. Be smarter.
All you have to do is find the important info and use it and do whatever and all you have to do is take the numbers do the question and ur done :D

so, that gives you the compounded amount, after 10 years, if you want to know how much interest was earned? well, just subtract the Principal from the Amount, or A - P <--- that's how much interest was earned
Answer:
4y
Step-by-step explanation:
Because it is the GCF of the numbers and it can't have an exponent since 16y has none.