Find the variance of the probability density function to the nearest hundredth.f(x) = 
- 
; [2, 6]
A. 0.88
B. 0.91
C. 0.16
D. 0.84
Answer: A
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Solve the problem.After t seconds the height s of an object propelled upward with an initial velocity of 3200 feet per second is given by s = 3200t - 16t2. What is the height the ball reaches after 114 seconds?
A. 156,864 feet B. 366,624 feet C. 362,976 feet D. 572,736 feet
For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.f(x) = 2x + 4; g(x) = 3x - 8;
Find f ? g.
A. (f ? g)(x) = 6x2 + 4x - 32; (-?, -32) ? (-32, ?) B. (f ? g)(x) = 5x2 - 4x - 4; (-?, ?) C. (f ? g)(x) = 6x2 - 4x - 32; (-?, ?) D. (f ? g)(x) = 6x2 - 32; (-?, -32) ? (-32, ?)
Using a graphing calculator to graph f and g in the window [0, 6, 1] by [0, 6, 1]. Which function is greater when 
?f(x) = x2.8, g(x) = x-2.8
A. g(x) B. f(x)
Write the equation of the line with the given slope and y-intercept.slope -9;y-intercept (0, 2)
A. y = -9x - 2 B. y = 2x - 9 C. y = -9x + 2 D. y = 9x + 2