Determine whether  figure 1.png)
is orthogonal to  figure 2.png)
Justify your answer.
What will be an ideal response?
 answer.png)
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Solve. To measure the spread of data, statisticians compute the sample variance of the data. For a sample of size 3, the sample variance can be computed using the expression 
where m is the mean of the three values a, b, and c. Rewrite this expression without parentheses, combining like terms.
A. 3m2 - 2am - 2bm - 2cm + a2 + b2 + c2
B. 
C. 
D. 
Perform the indicated operation(s). Where possible, reduce the answer to lowest terms.
- 
A. 
B. 
C. 
D. 
Solve the problem.A survey is taken to determine if Social Security should be privatized. Eight hundred players in a national bridge tournament are randomly surveyed. The survey found strong opposition to the concept of privatization. This conclusion might be invalid because
A. the size of the sample is too small. B. of the placebo effect. C. the sample is not representative of the population. D. there was no control group. E. none of these
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos(2?) = 
, 0 < ? < 
Find sin ?.
A. 
B. 
C. 
D. 