Answer:
625
Step-by-step explanation: 5^6/5^2
multiply 5^6 and than devide your answer with 5^2
Brand b is 2 cents cheaper than brand a because it is 14 cents per ounce and brand a is 16 cents per ounce you do 1.68 divided by 12 and 1.28 divided by 8
First off, see how much 8700 as principal, yields at 3% APR
that is

it will yield some amount
subtract that amount from 393
the difference is how much the yield will be on the 6% investment
so

Answer and workings are in the attachments below.