Answer:
Classic Maya civilization grew to some 40 cities.
It is estimated that at its maximum, the civilization had at least ten million people
Step-by-step explanation:
The rise of the Maya began about 250 ce, and what is known to archaeologists as the Classic Period of Mayan culture lasted until about 900 ce. At its height, Mayan civilization consisted of more than 40 cities, each with a population between 5,000 and 50,000
so the answer is 40 cities and 10 million people.