Find the variance of the probability density function to the nearest hundredth.f(x) = 
; [2, 8]
A. 2.86
B. 2.98
C. 2.75
D. 3.00
Answer: D
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Tell whether the expression is a monomial. If it is, name the variable(s) and coefficient, and give the degree of the monomial.-14x-3
A. Monomial; variable x; coefficient 3; degree -14 B. Monomial; variable x; coefficient -14; degree -3 C. Monomial; variable x; coefficient -14; degree 3 D. Not a monomial
Graph the function using its vertex, axis of symmetry, and intercepts.f(x) = -x2 - 2x + 8 
A. vertex (-1, -9)
intercepts (2, 0), (- 4, 0), (0, -8)
B. vertex (1, -9)
intercepts (-2, 0), (4, 0), (0, -8)
C. vertex (1, 9)
intercepts (-2, 0), (4, 0), (0, 8)
D. vertex (-1, 9)
intercepts (2, 0), (- 4, 0), (0, 8)
Solve the problem.A pendulum bob swings through an arc 40 inches long on its first swing. Each swing thereafter, it swings only 60% as far as on the previous swing. How far will it swing altogether before coming to a complete stop?
A. 67 inches B. 133 inches C. 50 inches D. 100 inches
Solve the equation.x + 19 = 2
A. {17} B. {21} C. {-21} D. {-17}