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April 17, 2014

April 17, 2014

Posted by **Jake** on Wednesday, January 18, 2012 at 5:29pm.

A ball in a pinball machine moves 13

of the way through a circular groove that has radius 3 m. How far does

the ball travel?

a. 3.14 m

b. 360 m

c. 6.28 m

d. 0.69 m

- Math -
**Reiny**, Wednesday, January 18, 2012 at 5:40pm"moves 13 of the way" ???

check your typing.

whole rotation = 2π(3) = 6π

take "whatever you mean" of that circumference.

I think you meant 1/3 of the way, sooo

circum = 6π = 18.85

1/3 of that is 6.28 , one of the choices

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