Answer: 18 c
Step-by-step explanation: since they have the same variables you can easily just add them together
Go to Math Papa that'll give you the answers with the work shown and explanations.
30mm is the missing angel
<h3>The final amount is $ 6881.71</h3>
<em><u>Solution:</u></em>
<em><u>The formula for compound interest, including principal sum, is:</u></em>

Where,
A = the future value of the investment
P = the principal investment amount\
r = the annual interest rate in decimal
n = the number of times that interest is compounded per unit t
t = the time the money is invested
From given,
p = 4000
t = 5

n = 4 ( compounded quarterly )
<em><u>Substituting the values in formula,</u></em>

Thus the final amount is $ 6881.71