Write as the sum and/or difference of logarithms. Express powers as factors.ln  , x > 4

A. 7ln x + ln (1 + 3x) - 9ln (x - 4)
B. ln 7 + ln x - 11ln (1 + 3x) - 9ln (x - 4)
C. ln 7 + ln x + ln (1 + 3x) - ln 9 - ln (x - 4)
D. ln 7 + ln x + ln (1 + 3x) - 9ln (x - 4)


Answer: D

Mathematics

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Provide an appropriate response.A shipment of 20 digital cameras contains two that are defective. A random sample of three is selected and tested. Let X be the random variable associated with the number of defective cameras in a sample. Find the probability distribution of X and the expected number of defective cameras in a sample.

What will be an ideal response?

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Find a polar equation of the conic that has a focus at the pole and that satisfies the given conditions.Ellipse; vertices (6, 0) and (4, ?)

A. r = 
B. r = 
C. r = 
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