Simplify.
A. 
B. 
C. 
D. none of these
Answer: B
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Solve the problem.Integrate 
over the region 1 ? x2 + y2 ? 4.
A. ? ln 2 B. 2? ln 2 C. ?(ln 2)2 D. 2?(ln 2)2
Health insurance administrative costs are a concern for many companies that supply the insurance for their employees. The information below is information gathered recently. Let x be the average number of employees in a group health insurance plan and y be the average administrative cost as a percentage of claims. Find the sample correlation coefficient. Round your answer to three decimal places.
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a. –0.83
b. –0.883
c. 0.78
d. 0.883
e. –0.78
Express the sum using summation notation.
+ 
+ 
+ ... + 
A. 
B. 
C. 
D. 
Factor the polynomial by removing the common monomial factor. 48x8y8 + 24x3y6 - 32x6y2
A. 8x3(6x5y8 + 3y6 - 4x3y2) B. 8x3y2(6x5y6 + 3y4 - 4x3) C. 8(6x8y8 + 3x3y6 - 4x6y2) D. x3y2(48x5y6 + 24y4 - 32x3)