The correct answer is: 7 is 1/10 of \(\boxed{70}\).
Explanation:
Simply translate "1/10 of what number is 7" mathematically as follows:
\(\frac{1}{10} * x = 7\) --- (1)
x represents "what number" in the sentence
= represents "is."
* represents "of."
Now evaluate equation(1) for x:
\(\frac{1}{10} * x = 7 \\x=70\)
Hence the correct answer is 7 is 1/10 of \(\boxed{70}\).
