Final answer:
The metric system is used by professionals in medicine, science and research, and engineering in the U.S., despite it not being widely used in everyday practice.
Step-by-step explanation:
Three professional areas in the U.S. that use the metric system include:
- Medicine: Healthcare professionals use the metric system for dosing medication, measuring blood volume, and recording vital statistics.
- Science and research: Scientists and researchers use the metric system to conduct experiments and record findings because it provides a standard unit of measure that facilitates data sharing and comparison globally.
- Engineering: Engineers use the metric system for designing products, since many components are sourced globally, and it is the primary system of measurement in science and technology worldwide.
While the United States has legally adopted the metric system, it is not ubiquitously used in everyday practice except in professional fields like those mentioned above. Great Britain and Canada use a combination of metric and imperial units.