Find the correlation coefficient.The test scores of 6 randomly picked students and the number of hours they prepared are as follows: 
A. -0.6781
B. 0.2242
C. -0.2242
D. 0.6781
Answer: B
Mathematics
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Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 
, x = 0, y = 1, y = 5
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Decide whether the given number is a solution of the given equation.Is 7 a solution of x - 2 = 5?
A. yes B. no
Mathematics
Identify where f is increasing and where f is decreasing.f(x) = -
A. increasing: [-8, ?); decreasing: never B. increasing: [8, ?); decreasing: never C. increasing: never; decreasing: [8, ?) D. increasing: never; decreasing: [-8, ?)
Mathematics
Check the answer. If incorrect, give the correct answer.
A. Incorrect; should be 62,315 R5 B. Incorrect; should be 62,314 R7 C. Incorrect; should be 62,314 R6 D. Correct
Mathematics