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3 years ago

My bed is 3 inches by 2 1/3 by 1/3. what is my volume?

Mathematics

1 answer:

neonofarm [45]3 years ago

8 0

2 1/3. 3 inches by 2 1/3 inches is 7. A 3rd of that is 2 1/3 or 2.3333333333

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Which is an expression to find the speed in m/s? d = 40 meters, t = 10 seconds

Jobisdone [24]

The answer is A because the equation is 40/10 which would give you 4 and it asks m/s.

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2 years ago

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Write the fraction in simplest form of 6/20.

nikklg [1K]

$\dfrac{6}{20}=\dfrac{6:2}{20:2}=\dfrac{3}{10}$

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2 years ago

Ten engineering schools in the United States were surveyed. The sample contained 250 electrical engineers, 80 being women; 175 c

steposvetlana [31]

Answer:

There is a significant difference between the two proportions.

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for difference between population proportions is:

$CI=(\hat p_{1}-\hat p_{2})\pm z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})}{n_{1}}+\frac{\hat p_{2}(1-\hat p_{2})}{n_{2}}}$

Compute the sample proportions as follows:

$\hat p_{1}=\frac{80}{250}=0.32\\\\\hat p_{2}=\frac{40}{175}=0.23$

The critical value of <em>z</em> for 90% confidence interval is:

$z_{0.10/2}=z_{0.05}=1.645$

Compute a 90% confidence interval for the difference between the proportions of women in these two fields of engineering as follows:

$CI=(\hat p_{1}-\hat p_{2})\pm z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})}{n_{1}}+\frac{\hat p_{2}(1-\hat p_{2})}{n_{2}}}$

$=(0.32-0.23)\pm 1.645\times\sqrt{\frac{0.32(1-0.32)}{250}+\frac{0.23(1-0.23)}{175}}\\\\=0.09\pm 0.0714\\\\=(0.0186, 0.1614)\\\\\approx (0.02, 0.16)$

There will be no difference between the two proportions if the 90% confidence interval consists of 0.

But the 90% confidence interval does not consists of 0.

Thus, there is a significant difference between the two proportions.

4 0

2 years ago

Please help!! I have no idea what I’m doing here

Maurinko [17]

Hello from MrBillDoesMath

Answer: SAS, the second choice

Discussion:

The sides with a single "tick mark" in each triangle have the same length.

The sides with two "tick marks" in each triangle have the same length.

Finally the angle shown in each triangle is the same.

Hence we have congruence by S(ide)-A(ngle)-S(ide) which is the second bullet point from the top of the list.

Thank you,

Mr. B

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2 years ago

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In algerbra we use an blank to represent a varible

Juli2301 [7.4K]

Answer:

We use letters to represent a variable in expressions. I hope this helps!

Step-by-step explanation:

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2 years ago