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2 years ago

I need help im kinda stuck lol

Mathematics

2 answers:

balandron [24]2 years ago

7 0

The answer would be one two people hope I helped

anastassius [24]2 years ago

5 0

Answer:

1 person did as you can see

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Find the area of the circle. Round to the nearest tenth.

Lerok [7]

Answer:

283.5

Step-by-step explanation:

A=πr^2

A=π(9.5^2)

A=π(90.25)

π x 90.25=283.5 (rounded to the nearest tenth)

4 0

3 years ago

I'm so confused,can someone please explain how to do this,I've watched countless things and can't seem to catch on. Thanks!(:

avanturin [10]

Answer:

40cm

Step-by-step explanation:

5 0

3 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

A set of 6 number cards contains the numbers 2,5,7,8,9, and 11. Which ratio of odd number cards to total cards in the set?

Harlamova29_29 [7]

The ratio would be 4:6 because there are 6 number in total and 4 of them are odd numbers.

6 0

2 years ago

a) The radius of a circular field is 42 m. Find the perimeter of the field. Also find the length of wire required to fence it wi

rewona [7]

263.89

263.89*5=1319.45

5 0

3 years ago

Read 2 more answers