Discussion
40% of deaths on city roads may be attributed to drunken driving. The number of degrees needed to represent this as a slice of a pie chart is
Answer: B
The slice needs 144 degrees.
A full pie chart is 360°, and each slice is the same fraction of 360° as its share of the total:
\[ 0.40 \times 360^{\circ} = 144^{\circ} \]
120° is a third of the circle (about 33%), and 160° is about 44%. 212° is close to the 60% remainder (216°), the slice for deaths not attributed to drunken driving, not the 40% asked for.
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