In step 3, I do not understand where the (6e-3)^2 comesfrom.
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I do not understand where they got the value of 827 in step 3. I have tried multiplying treating it as a fraction and do not the same or close answer.
In step 1, where does the 6.0 x 10^13 come from? I do not understand how this number was calculated.
I do not understand the auxiliary equation. Where did the m come from? Also, how did you get the sinusoidal equation in the next step??