Kate's pen is 13.7 centimeters long. Which mixed number is equivalent to 13.7 ? (A) \( 13 \frac{1}{7} \) (B) \( 13 \frac{1}{70} \) (C) \( 13 \frac{7}{10} \) (D) \( 13 \frac{7}{100} \)

To convert 13.7 into a mixed number, we can break it down into its whole number and decimal parts. The whole number is 13, and the decimal 0.7 can be expressed as a fraction. Since 0.7 is equivalent to \( \frac{7}{10} \), the mixed number combining these parts is \( 13 \frac{7}{10} \). So, the correct answer is (C) \( 13 \frac{7}{10} \). For a little fun trivia, did you know that mixed numbers like this one can often be found in everyday life? From measurements in baking to construction projects, knowing how to convert and work with fractions can make all the difference! Also, if you're ever in doubt about converting decimals to fractions, just remember to look at the digits after the decimal point. In this case, since we had one digit after the decimal (7), it helped us determine that we were dealing with tenths.