algebra
posted by paul .
Time to swing. The period T (time in seconds for one complete cycle) of a simple pendulum is related to the length L (in feet) of the pendulum by the formula 8T^2=n ^2 L. If a child is on a swing with a 10 foot chain, then how long does it take to complete one cycle of the swing?
Thanks

n is not defined in your formula.
you have 3 variables in your equation , but supply the value of only one of them.
no can do!!
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