Solve the problem.The following points form a quadratic relationship: (1, 5.0), (2, 4.4), (3, 4.3), (4, 4.2), (5, 4.6), (6, 4.8), 
(8, 6.2). The x-coordinates are the years a particular company has been in operation and the y-coordinates are the profit, in millions, for that year. Use quadratic regression to estimate the profit in the ninth year.
A. 4.47 million
B. 6.48 million
C. 7.38 million
D. 7.19 million
Answer: D
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Refer to the double-bar graph below which shows the number of male and female athletes at a university over a four-year period. Solve the problem.
What is the only year in which the number of female athletes declined from its previous value?
A. 2005 B. 2002 C. 2003 D. 2004
Verify the identity.
= 
What will be an ideal response?
Solve the problem.A factory produces screws, which are packaged in boxes of 30. Four screws are selected from each box for inspection. A box fails inspection if two or more of these four screws are defective. What is the probability that a box containing two defective screws will pass inspection?
What will be an ideal response?
Find the difference and check.82 - 1.75
A. 80.925 B. 6.45 C. 80.25 D. 81.825