Question

I NEED HELP AS SOON AS POSSIBLE!!!!

Answer 1

11) 13,116.51
12) 13,140.66
13) 13,157.04
14) 13,165.31
15) 8.25% quarterly 8,317.84
8.30% semi-annually 8,306.64

Here's a good compound interest calculator:
http://www.1728.org/compint.htm