To place 0.4 on a number line, a candidate divides the gap between 0 and 1 into how many equal parts?

1. The digit sits in the tenths place. 2. Tenths means the whole is split into ten equal pieces. 3. So the interval is split into ten parts, and 0.4 is the fourth mark. _Source: OpenStax Prealgebra 2e, Chapter 5, Decimals._