How many minerals have been identified as essential?

Which factors slowed population growth in china until the 1300? a. one child policy. b. urbanization c. epidemics. d. warfare

When another customer complains about the hair salon where georgeanna is a loyal customer, she defends it because she feels responsible for the continued success of the hair salon. this behavior suggests she has reached the rung of the loyalty ladder.

Suppose you are a freshmen in college and you have not declared a major. one reason you enrolled at your respective college was the school's vibrant social life. at the same time, you want to balance your academic life because you know that your grades will matter for graduate school or job applications.you decide to forgo partying for two hours to study for an upcoming economics exam. in your first semester's principles of economics class, you learn that the enjoyment you would have received from partying is an example of a(n)