Answer: Naomi is not right and the monthly interest rate that gives her the interest as 6% is 5.97%
Explanation:
The formula to calculate the future value of compound interest is
A=p (1+r÷n)^tn
A future value?
P present value assume 100
R interest rate
N frequency of time like quarterly. .
T time assume 1 year
Let's try the interest of 6% quarterly (4)
A=100×(1+0.06÷4)^(1×4)=106.136
Now try the interest of 5.97% monthly (12)
A=100×(1+0.0597÷12)^(1×12)=106.136
Which gives her the same result as 6% quarterly interest rate.
Hope it helps!