A circle has a central angle of 6 radians that intersects an arc of length 14 in. Which equation finds the length of the radius, r , of the circle?

Use the arc-length formula s = rθ, where θ is measured in radians. Substituting the arc length 14 and angle 6 gives 14 = 6r, so r = 14/6. Therefore, the correct choice is “r is equal to 14 sixths.”

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