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Which of the following are more precise than a weight of 10 pounds? A.50 pounds B.30 pounds C.15.5 pounds D.8.0 pounds

1 Answer

3 votes

Answer:

  • C. 15.5 pounds
  • D. 8.0 pounds

Explanation:

Anything expressed to a precision smaller than 10 pounds will be more precise. Choices C and D are both expressed to a precision of 1/10 pound, so are more precise than a weight expressed to the nearest 10 pounds.

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The convention for indicating that the 0 in 10 is significant is to write the number with a trailing decimal point: 10. pounds. Since the number here is not written that way, we must presume its precision is 10 pounds (not 1 pound). Both of the choices 50 and 30 suffer the same problem.

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