How did Ptolemy help Alexandria grow as a place of learning?

He was responsible for building the Museum of Alexandria.
He was an important teacher at the university in Alexandria.
He was the founder and caretaker of the Library of Alexandria.
He was the leader of the scientific community in Alexandria.

A . He was responsible for building the Museum of Alexandria.

Explanation:

whose power in the senate is equal to the power of the speaker of the house?

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration