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soldier1979 [14.2K]
3 years ago
15

In the USA today internet poll 73 percent of readers indicated that they were satisfied with their lives.

Mathematics
1 answer:
Anni [7]3 years ago
6 0

Answer:

c) Population parameter or Population statistic

Step-by-step explanation:

<u>Population</u>:-

<em>The totality of observation with which we are concerned , whether this number be finite or infinite is called population</em>

<u>Sample </u>:

A sample is subset of a Population

Given data  the USA today internet poll is called Population

<em>Given data 73 percent of readers are satisfied with their lives. </em>

<em>This is called Population parameter.</em>

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Find the dot product of the position vectors whose terminal points are (14, 9) and (3, 6).
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Answer:

Step-by-step explanation:

The formula for the dot product of vectors is

u·v = |u||v|cosθ

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|u|=\sqrt{14^2+9^2} which is \sqrt{277}

|v|=\sqrt{3^2+6^2} which is \sqrt{45}

I am assuming by looking at the above that you can determine where the numbers under the square root signs came from. It's pretty apparent.

We also need the angle, which of course has its own formula.

cos\theta=\frac{uv}{|u||v|} where uv has ITS own formula:

uv = (14 * 3) + (9 * 6) which is taking the numbers in the i positions in the first set of parenthesis and adding their product to the product of the numbers in the j positions.

uv = 96.

To get the denominator, multiply the lengths of the vectors together. Then take the inverse cosine of the whole mess:

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