The phrase "nine hundred fifty-one" refers to the number 951.
Looking at the options provided:
- nine hundred fifty-one = 951
- 95.1 is not equal to 951.
- 9.51 is not equal to 951.
- nine hundred fifty-one thousandths refers to the decimal 0.951.
None of the given options directly refer to the number 951. However, if we consider the representation in terms of thousandths, "nine hundred fifty-one thousandths" (which corresponds to 0.951) is related but is not equal to 951.
So the best interpretation of the question is that "nine hundred fifty-one" equals 951, but this exact option is not listed among the four provided answers.
If you are looking for an equivalent form among the options without additional context, none of the options equals 951 directly. If you're interpreting any of the options as a different form of representation (like decimal places), please clarify.