Answer:
Step-by-step explanation:
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A recent personalized information sheet from your wireless phone carrier claims that the mean duration of all your phone calls w
as μ = 2.9 minutes with a standard deviation of σ = 1.9 minutes. From a random sample of n = 50 calls, your parents computed a sample mean of 
= 3.6 minutes and a sample standard deviation of s = 2.6 minutes.
Sketch the population distribution for the duration of your phone calls. What are its mean and standarddeviation?
Sketch the population distribution for the duration of your phone calls. What are its mean and standarddeviation?
1 answer:
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Answer:
Option C.
Step-by-step explanation:
Note: In the given function the power of x should be 2 instead of 4, otherwise all options are incorrect.
Consider the given function is
If , then
is an even function.
If , then
is an odd function.
Now, substitute x=-x in the given function.
So, the given function not an odd function. It means it is an even function.
To check whether the given function is odd, we have to determine whether is equivalent to
.
Therefore, the correct option is C.
The difference of the expression is
The expression is given as:
Factor the denominators of the expressions:
Apply the difference of two squares to x² - 9
Take LCM
Hence, the difference of the expression is
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