Solve the problem.What is the intensity in watt/m2 of a noise that's loudness is measured at 51 decibels?
A. 1.26 × 10-7 watt/m2
B. 5.1 × 10-10 watt/m2
C. 1.64 × 1014 watt/m2
D. 1.26 × 10-6 watt/m2
Answer: A
Mathematics
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= cot ? - tan ?
What will be an ideal response?
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Find the length and direction (when defined) of u × v.u = 2i + 2j - k, v = -i + k
A. 9; 
i - j - 
k
B. 3; -
i + j - 
k
C. 3; 
i - j + 
k
D. 9; 
i - j + 
k
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Decompose into partial fractions.
A. 
- 
B. 
+ 
C. 
- 
D. 
+ 
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X is Binomial(7, 0.4).
Find E ( X ), Var ( X ), and SD( X ) for the given random variable
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