The standard diameter of a golf ball is 42 point 6 7 mm. A golf ball factory does quality control on the balls it manufactures. Golf balls are randomly measured to ensure the correct size. One day, an inspector decides to stop production if the discrepancy in diameter is more than 0 point 0 0 2 mm. What is the range of acceptable values?
Answer
A
42 point 6 7 0 mm to 42 point 6 7 2 mm
B
42 point 6 7 0 mm to 42 point 6 7 4 mm
C
42 point 6 6 8 mm to 42 point 6 7 0 mm
D
42 point 6 6 8 mm to 42 point 6 7 2 mm
Explanation
Acceptable diameters differ from the standard 42.67 mm by no more than 0.002 mm. Subtracting and adding 0.002 gives 42.668 mm and 42.672 mm. Therefore, the acceptable range is 42.668 mm to 42.672 mm, choice D.
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