Answer
$E=5.1\times10^4\frac{N}{C}$
Work Step by Step
We know that
$E=\frac{\sigma}{\epsilon_{\circ}}$
Putting the values and solving:
$E=\frac{4.5\times10^{-7}}{8.85\times10^{-12}}$
$E=5.1\times10^4\frac{N}{C}$
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