What is the diameter of B?
With explanation. No links.

47. a student is frightened by a loud noise, which results in a hormone being released into the blood. the hormone causes the student's heart to beat rapidly. the two systems that work together to cause this reaction are the endo- crine system that secretes the hormone and the (1) nervous system (3) excretory system (2) reproductive system (4) digestive system

Which excerpt from langston hughes's poem "madam and the rent man" best demonstrates the speaker's determination?

Cuvinte care au sens comun cu cuvantul zapada