Find the variance of the probability density function to the nearest hundredth.f(x) = 
; [3, 5]
A. 0.31
B. 0.33
C. 0.27
D. 0.25
Answer: A
Mathematics
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Rewrite as a numeral.Six hundred eighty-four thousandths
A. 684,000 B. 0.0684 C. 680.004 D. 0.684
Mathematics
Does the equation 
have any roots that are real numbers?
?
A. no B. yes
Mathematics
Graph the equation by plotting points.y = 3x + 9
A. 
B. 
C. 
D. 
Mathematics
Find the center and the radius of the circle.x2 + y2 - 8x - 6y + 16 = 0
A. (-4, 3); r = 3 B. (4, 3); r = 3 C. (4, -3); r = 3 D. (-4, -3); r = 3
Mathematics