A federal agency responsible for enforcing laws concerning weights and measures routinely inspects packages

to make sure no one is sending illegal substances...

Very interesting but I don't see a question here.

Yes, but the one a while before had to do with grams and rounding : )

Isn't it fun when people post incomplete questions? We get to make up the rest ourselves!

Ms. Sue used to tell students that her crystal ball was cloudy today! Love it!!

The federal agency responsible for enforcing laws concerning weights and measures and routinely inspecting packages is the National Institute of Standards and Technology (NIST). NIST is part of the U.S. Department of Commerce and is responsible for promoting and maintaining uniformity in measurements and standards across the country.

To find this answer, you could have either prior knowledge or you can conduct an internet search. By typing the keywords "federal agency for enforcing weights and measures" or "agency that inspects packages for weights and measures" into a search engine like Google, you would be able to find the relevant information within the search results.