Posted by **Anonymous** on Wednesday, September 21, 2011 at 6:18pm.

A pendulum swings through an arc length of 1120 cm (Swing #1). With each further swing, the arc length is reduced by 15 %

State the growth factor.

Calculate the length of the arc in swing #5

I think im supposed to use this formula again, but I dont know how to use it. Tn = ar^n-1

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