Solve the problem.The lifetimes of light bulbs of a particular type are normally distributed with a mean of 360 hours and a standard deviation of 8 hours. What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
A. 95.44%
B. 68.26%
C. 84.13%
D. 31.74%
Answer: B
Mathematics
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Find the equilibrium solution of the equation. Use a sketch of the direction field for 
to determine whether the equilibrium is stable.y'(t) = 2y - 20
A. y = 10; unstable
B. y = 10; stable
C. y = 
; unstable
D. y = 22; stable
Mathematics
Determine if the given ordered pair is a solution to the equation.-15x - 17y = -83, (1, 4)
A. Yes B. No
Mathematics
Round the number as requested.92,241 to the nearest thousand
A. 93,000 B. 92,100 C. 92,000 D. 102,000
Mathematics
Find the real solutions of the equation. Use a calculator to express the solutions rounded to two decimal places.?(1 + x)2 - 5 = 2(1 + x)
A. {-1.62, -0.62} B. {0.62, -1.98} C. {-0.62, -0.18} D. {-0.62, 0.82}
Mathematics