Provide an appropriate response.The life expectancy (in hours) of a fluorescent tube is normally distributed with mean 7,000 and standard deviation 1,000. Find the probability that a tube lasts for more than 8,900 hours.
A. 0.0281
B. 0.9719
C. 0.0287
D. 0.9713
Answer: C
Mathematics
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Factor the difference of two squares.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Find the derivative.f(x) = 
(3x - 5) + 12x
A. f'(x) = 3x1/2 - 5x-1/2 + 12x B. f'(x) = 4.5x3/2 - 2.5x1/2 + 12 C. f'(x) = 4.5x1/2 - 5x-1/2 + 12 D. f'(x) = 4.5x1/2 - 2.5x-1/2 + 12
Mathematics
Determine whether the function is a solution of the wave equation.w = ex - ct
A. Yes B. No
Mathematics
Add or subtract.11
+ 15
A. 26
B. 26
C. 26
D. 4
Mathematics