The correct answer is:
30 + 6 + 0.1 + 0.04.
Explanation:
We write numbers in expanded form using place value.
3 is in the tens place; this makes its value 30.
6 is in the ones place; this makes its value 6.
1 is in the tenths place; this makes its value 0.1.
4 is in the hundredths place; this makes its value 0.04.
Together we find the sum:
30 + 6 + 0.1 + 0.04.