Answer:
Thus, check off all but the 3rd check box.
Explanation:
You are given the equation
and are solving for m. Thus, all we have to do is perform reverse operators until we are left with just m on the right side.
To start, divide both sides by 2pi, getting

Then, square both sides to get rid of the radical:

Next, simply multiply both sides by k and distribute the square across the multiplicands:

Thus, check off all but the 3rd check box.