Use the given covariance matrix to compute the percentage of the total variance that is contained in the first principal component. Round to one decimal place.S = 
A. 86.2%
B. 82.4%
C. 89.7%
D. 13.8%
Answer: A
Mathematics
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Solve the equation.log x = - 3
A. x = 
B. x = 30
C. x = 
D. x = -30
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Solve the equation.8x - (4x - 1) = 2
A. - 
B. - 
C. 
D. 
Mathematics
Find the interval of convergence of the series.
A. x < 2 B. -4 ? x < 6 C. 0 < x < 2 D. 0 ? x < 2
Mathematics
Find the area of the sector formed by central angle ? = 10° in a circle of radius r = 4 m. ? If the answer needs rounding, round it to three significant digits. ? A = __________ m2
What will be an ideal response?
Mathematics