Aresearcher has found that students who sleep more in class get lower grades on their exams. this is an example of a(n)
a) positive correlation.
b) independent variable.
c) negative correlation.
d) dependent variable.

The correct answer is a. necrophagous insects mark me the brainliest i need one more you!

To solve this integral, what you can do is split it up as follows: (1) ∫40(x2−4)dx=∫40(x2)dx−∫40(4)dx. to integrate  4  as an  indefinite integral, a good rule of thumb is  by  an equation below  for  polynomials; . (2) ∫xa=xa+1a+1+c , where a is any number. c denotes some constant that is crucial when doing 

Ithink it’s a but it might be wrong so sorry