As part of a statistics project, a 6th grade teacher brings to class a container with 300 red marbles and 500 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 40 marbles from the container. Of the 40 marbles drawn, 16 are red.The sampling error is most likely a result of
A. a confounding variable.
B. sampling bias.
C. sampling variability.
D. nonresponse bias.
E. none of these
Answer: C
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if 
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Provide an appropriate response.For the function f(x) = 
x - 1, find f(-4).
A. -5 B. -4 C. -2 D. -3
Solve the equation by completing the square.  figure 1.png)
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