Answer:
it's 60
Explanation:
Im only gathering this information from the little information you have provided
I believe the first one is 'physical geography' :-)
~Hello there! ^_^
Your question: What physical feature marks the eastern boundary of the cultural subregion known as European Russia..?
Your answer: The Ural Mountains physical feature marks the Eastern boundary o f the cultural subregion known as European Russia.
Happy Studying! :)
The best answer to the question presented above would be the first statement. Stalactites are chemical sedimentary rocks that form when the minerals in the cave are left behind by the water. They saturate and form into these stalactites.