If a firefighter needs 2100 feet of hose, how many sections are needed?

To determine how many sections of hose the firefighter needs, first, you need to know the length of each section of hose. Assuming that each standard section of hose is typically 50 feet long, you can divide the total needed length (2100 feet) by the length of each section.

By performing the calculation:

[ \text{Number of sections} = \frac{2100 \text{ feet}}{50 \text{ feet/section}} = 42 \text{ sections} ]

This calculation shows that to cover a distance of 2100 feet with sections of 50 feet each, you would indeed require 42 sections. This is why that answer is the correct choice. It clearly illustrates the relationship between the total length needed and the length of each individual section, ultimately enabling the firefighter to understand how to efficiently utilize their equipment.