The minute hand of a clock is 4.5 inches long .what distance does the tip move in 25 minutes
s = r * θ where s is the arc length, r is the radius of the circle and θ is the angle in radians.
s = 4.5in * θ
25 mins are "\\frac{5}{12}" of an hour and the angle is "\\frac{5}{12}" of "2 \\pi = \\frac{5 \\pi}{6}"
s = 4.5in * "\\frac{5 \\pi}{6}" = "\\frac{15 \\pi}{6}" inches, about 11.78 inches
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