SSAT Math Question 138: Answer and Explanation
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Question: 138
14. A micromillimeter is defined as one millionth of a millimeter. A length of 17 micromillimeters may be represented as
- A. 0.00017 mm.
- B. 0.000017 mm.
- C. 0.0000017 mm.
- D. 0.00000017 mm.
Correct Answer: B
Explanation:
The correct answer is (B). 17 millionths in decimals is 0.000017. The number of places to the right of the decimal point is equal to the number of zeros in the whole number. 17,000,000 has six zeros.