19) (4pts) On a multiple choice test with 21 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the standard deviation for the number of correct answers.
A) 15.5
B) 39.4
C) 3.9
D) 2

Jasmine thinks that andrea is responsible for posting embarrassing pictures of her on the internet and sending them around the school. jasmine finds andrea before school and starts yelling at her about taking the pictures down. andrea pushes jasmine. what should jasmine do first?

What are the costs and benefits of leaving home after high school?

Need will give 100 ! in no less than one hundred fifty words, explain why it is important for engineers to sketch designs and use them to clarify their designs to other people, giving at least three reasons.