Peter and his partner are conducting a physics experiment on pendulum motion. Their 30 cm pendulum transverses an arc of 15 cm. To the nearest degree, how many degrees of rotation did the pendulum swing?

90/pi degrees

Step-by-step explanation:

It forms a 15cm arc from a circle of radius 30 cm.

The diameter is 30*2*pi = 60pi cm. So the arc is 15/60pi = 1/4pi of the way around a 360 degree circle. This is 1/4pi * 360 = 90/pi degrees.

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step-by-step explanation:

only 10/60 isn't equivalent

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