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It doesn't matter. Either way will give you the same answer.
Yes, but you also leave it where it was, so the derivative is -2.2e^-2.2t
And from there you just have to equate it to 0. Feel free to come back if you're still stuck.
yeah. bc im supposed to solve for t.
Always post all your work. Not only does it make it easier for us, but it shows us exactly where you went wrong.
You need to find out when it stops, aka when velocity is 0. So to find an equation for speed, you need to take the derivative of the distance (location).
A electron moving along the x axis has a position given by x = 24 te^-2.2 t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?