A 30 cm pendulum swings and creates an arc of 15 cm. to the nearest degree, how many degrees of rotation did the pendulum swing?

Thanks and just for laughs... 2 fish are swimming, hit a wall and say dam.

Using

s = rΘ  

We have

15 = 30Θ    divide both sides by 30

1/2 = Θ         and this is in radians

So, converting rads to degrees, we have

1/2rads x (180°/pi rads) ≈ 28.65°