Electric potential due to a point charge:

$\overline{){\mathbf{V}}{\mathbf{=}}\frac{\mathbf{k}\mathbf{q}}{\mathbf{r}}}$

For an equilateral triangle, the distance from the center to any vertex is given by:

$\overline{){\mathbf{r}}{\mathbf{=}}\frac{\mathbf{a}}{\sqrt{\mathbf{3}}}}$

where **r** = **Oa** = **Ob** = **Oc** and **a** = 3.0 cm.

What is the electric potential at the point indicated with the dot in the figure? Express your answer to two significant figures and include the appropriate units.

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