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. 0.6781
C. -0.2242
D. 0.2242
Answer: D
Mathematics
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Add or subtract as indicated. Simplify if necessary.
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the area if the distance between two adjacent dots in a row or column is one unit.
A. 10 B. 6 C. 9 D. 8
Mathematics
Find all the zeros of the polynomial function.P(x) = 3x4 - 15x3 + 30x2 - 60x + 72
A. 2, 3, -2i, 2i B. 2, 3, -i, i C. 1, 3, -4i, 4i D. - 2, -3, -2i, 2i
Mathematics
Use the drawing provided to explain the following.Given: 
, 
, and 
are the medians of 
Prove: 
What will be an ideal response?
Mathematics