How to Calculate Force of Tension and Theta?

[temaire]

Homework Statement

Find the force of tension and \theta.

Homework Equations

<br /> F_e=\frac{kq_1q_2}{r^2}

F_g=mg

tan\theta=(\frac{opposite}{adjacent})

The Attempt at a Solution

Am I correct?

 

[temaire]

Does anyone need me to explain the problem?

 

[temaire]

Is there a reason why no one is answering my question? Because if there is I will try to do something about it, whether it is to restate the problem, or explain my work.