Use Chebyshev's theorem to solve the problem.In a certain distribution of numbers, the mean is 50 and the standard deviation is 6. What can you say about the percentage of numbers that lie between 26 and 74?
A. at least 93.8%
B. at least 75.0%
C. at most 75.0%
D. at most 93.8%
Answer: A
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In a series circuit, XC = 2.2 Kê and R = 4.7 Kê. Find I when E = 24 V.
a. 3.48 mA b. 4.63 mA c. 8.48 mA d. 90.6 mA e. 124.5 mA
Solve the problem.The position of a weight attached to a spring is s(t) = -7 cos 8?t inches after t seconds. What is the maximum height that the weight reaches above the equilibrium position and when does it first reach the maximum height?
A. The maximum height of 14 inches is first reached after 2 seconds. B. The maximum height of 14 inches is first reached after 4 seconds. C. The maximum height of 7 inches is first reached after 0.13 seconds. D. The maximum height of 7 inches is first reached after 4 seconds.
Write the equation of the axis of symmetry.f(x) = 2x2 - 4x - 3
A. x = -5 B. x = 1 C. x = 5 D. x = -1
Find the following.Find -x when x = -9.8.
A. -9.8
B. - 
C. 9.8
D. 0