Find the variance of the probability density function to the nearest hundredth.f(x) = 1 - 
; [1, 4]
A. 0.52
B. 0.53
C. 0.61
D. 0.57
Answer: D
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Evaluate.
A. 68,880 B. 2,686,320 C. 1722 D. 126
Write the first five terms of the arithmetic sequence with the given values.a1 = -21, d = 6
A. -9, -3, 3, 9, 15 B. -21, -15, -9, -3, 3 C. 3, -3, -9, -15, -21 D. -9, -15, -21, -27, -33
First estimate the answer. Then add or subtract to find the exact answer. Write answer as a mixed number. 
A. Estimate: 13; Exact: 13
B. Estimate: 12; Exact: 15
C. Estimate: 12; Exact: 12
D. Estimate: 13; Exact: 12
The augmented matrix of a system of equations has been transformed to an equivalent matrix in row-echelon form. If the system is consistent, then give the solution. If it is not, then state that it is inconsistent.
A. (63, -22, 5) B. (68, -24, 5) C. (63, -24, 5) D. Inconsistent