You can put this solution on YOUR website! .
Find the nominal rate corresponding to an effective rate of 5.85% if interest is compounded quarterly.
~~~~~~~~
See how I edited your post in order for it would make sense.
Let "r" be the nominal rate.
Then your equation is
= 1.0585.
Take the root of the degree 4 from both sides
1 + r = 1.014315.
It implies
r = 1.014315 - 1 = 0.014315.
Then the nominal annual rate is 4*0.014315 = 0.05726 = 5.726%. ANSWER