Question 1035117
If $600 is invested at 8% compounded quarterly, what is the interest earned after: 
5 years interest earned=
4 years interest earned=

First we find what $600 will have grown to by using the
formula

{{{A=P*(1+r/n)^(n*t)}}}

where 
P = the beginning amount = 600
r = the percentage interest expressed as a decimal = 0.08
n = the number of times per year interest is accumulated = 4
t = the number of years that have passed since the money was invested = 5
in the first part of the problem and 4 in the second.
A = the amount the $P will have grown to after n years.

So substitute those in the formula and calculate A. 
Then subtract P from A to find out how must interest
was added over those 5 or 4 years.

Edwin</pre>