Find the expected value for the random variable x having this probability function.
A. 45
B. 55
C. 50
D. 50.5
Answer: D
Mathematics
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Sketch the graph of the parametric equations. Then set up the appropriate integral to find the length of the curve and use a computer to evaluate it.x = 2 sin t, y = 2 cos t, 0 ? t ? 2?
A. L = 5?
B. L = 5?
C. L = 2?
D. L = 4?
Mathematics
Estimate. Choose a rounding digit that gives one or two nonzero digits.4.5 × 2.63
A. 8 B. 1.5 C. 0.8 D. 15
Mathematics
Solve the problem.For what point(s) on the curve of y = -0.5x2 + 13x is the slope of a tangent line equal to 1?
A. (12, 84) B. (0, 0) C. (6, 42) D. (1, 12.5)
Mathematics
Solve the inequality. Graph the solution set and write it in interval notation.5x - 6 > 4x - 5
A. [1, ?)
B. (1, ?)
C. (-?, 1)
D. (-11, ?)
Mathematics