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3 years ago

Help needed with both 9 & 10

Mathematics

1 answer:

fomenos3 years ago

6 0

To find 9 you have to do Diameter x pi and when you do that you get 7.85

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True of False? The cosine of an angle is the ratio of the opposite side over the hypotenuse.

Tanya [424]

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3 years ago

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The average daily volume of a computer stock in 2011 was μ=35.1 million shares, according to a reliable source. A stock analyst

alexandr1967 [171]

Answer:

The 95% confidence interval is ( 27.126 , 34.674)

Step-by-step explanation:

Given

The t critical value at 0.05 level = 2.023 for the df = 39

Confidence interval = 95%

Mean

$\bar{x} - t * \frac{s}{\sqrt{n} } < \mu < \bar{x} + t * \frac{s}{\sqrt{n} }$

Substituting the given values we get -

$\30.9 - 2.023 * \frac{11.8}{\sqrt{40} } < \mu < \30.9 + 2.023 * \frac{11.8}{\sqrt{40} }\\27.126 < \mu < 34.674$

Hence, the 95% confidence interval is

( 27.126 , 34.674)

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3 years ago

Answer? I need it for math.

ladessa [460]

Answer:

The answer is D i guess . ( Not completely sure )

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3 years ago

Find the interquartile range using the following data 4 ,4 , 4 ,4 ,5, 6 ,7 , 7 ,7

katen-ka-za [31]

Answer:

Step-by-step explanation:

Ascending order:

4 ,4 , 4 ,4 ,5, 6 ,7 , 7 ,7

9 data: split in

4 ,4 , 4 ,4 | 5 | 6 ,7 , 7 ,7

4 ,4 | 4 ,4 | 5 | 6 ,7 | 7 ,7

(7+7)/2-(4+4)/2

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3 years ago

9-2x=7x <br> How do I solve for x?

Olin [163]

Answer:

x= -1

Step-by-step explanation:

First add 2x to the 7x it will look like this

9=9x

Now you need x by itself so divide 9 on both sides it will look like this

1=x and thats your answer just swap the x and the 1

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3 years ago

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