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2 years ago

22. Which of the following is recommended as a way to prevent vehicle backover deaths?

Mathematics

1 answer:

shepuryov [24]2 years ago

4 0

The correct answer is D because students shouldn’t play or be near when cars have to pull in or ride by

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Please help thank you

beks73 [17]

Answer:

The answer is the first R

Step-by-step explanation:

Because I said so

4 0

2 years ago

What is the solution to the equation 1/3(x-2)=1/5(x+4)+2 ?

Airida [17]

7.3 is the answer i believe

3 0

3 years ago

2x + y = −3 −2y = 6 + 4x Write each equation in slope-intercept form.

Zanzabum

slope intercept form is y=mx+b

so solve for y

2x+y=-3

minus 2x both sides

y=-2x-3

-2y=6+4x

divide both sides by -2

y=-3-2x

y=-2x-3

6 0

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

How many hundredths in 4.97

Oksanka [162]

7 is in the hundredths place.
There are 7 one hundredths.

7 0

2 years ago

Read 2 more answers