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3 years ago

Bookstore has 6 shelves of books about animals there are 30 books on each shelf how many books about animals does bookstore have

Mathematics

2 answers:

Darina [25.2K]3 years ago

6 0

180 because if you multiply 30x6=180 hope I helped

Sonbull [250]3 years ago

4 0

the answer is 6×30=180

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At the market, 777 apples cost \$4.55$4.55dollar sign, 4, point, 55. how much do 999 apples cost? \$

vredina [299]

I divided $.55 by 777 and got 0.00585 cents per apple. Then I mulitplied 0.00585 by 999 and got $5.85.

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3 years ago

The Punnett square shown presents a cross between two piranha. Both parents have large teeth.

Jlenok [28]

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3 years ago

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Vicky downloaded to apps on her iPhone the first app was $599 and the second Apple was 14. $33 how much did Vicky spend on the a

Gala2k [10]

Answer:

573.33

Step-by-step explanation:

599+14.33

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2 years ago

Graph the line y+3=-1/4(x-3)

insens350 [35]

Answer:

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x y

0 -2.25

3 -3

5 -3.5

-1 -2

-9 0

Now, graph these and draw a line through the points:

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3 years ago

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In a manufacturing process a random sample of 9 bolts manufactured has a mean length of 3 inches with a standard deviation of .3

Serggg [28]

Answer:

The correct option is (C) (2.769, 3.231).

Step-by-step explanation:

The confidence interval for mean when the standard deviation is not known is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}$

Given:

$\bar x = 3\\s=0.3\\n=9\\\alpha =1-0.95=0.05$

Compute the critical value as follows:

$t_{\alpha/2, (n-1)}=t_{0.05/2, (9-1)}=t_{0.025, 8}=2.31$

**Use a <em>t</em>-table.

The 95% confidence interval for true mean length of the bolt is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}\\=3\pm 2.31\times \frac{0.30}{\sqrt{9}}\\ =3\pm 0.231\\=(2.769, 3.231)$

Thus, the 95% confidence interval for true mean length of the bolt is (2.769, 3.231).

The correct option is (C).

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3 years ago