Can someone explain the korean learning process?

At a price of books will be both supplied and demanded. $10 $20 $30

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

Using the spelling rules you learned, determine which of the following words is spelled correctly. (5 points) receipt whineing pumpping freind