Answer:
[tex]k=2\sqrt{J}[/tex]
Step-by-step explanation:
If the equation is [tex]J = \frac{k^2}{4}[/tex], begin by taking the square root of each side.
[tex]\sqrt{J} = \sqrt{\frac{k^2}{4}} \\\sqrt{J}=\frac {k}{2}[/tex]
Now multiply each side by 2.
[tex]\sqrt{J}=\frac {k}{2}\\2\sqrt{J} = k[/tex]
The solution is [tex]k=2\sqrt{J}[/tex] or option d.
