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3 years ago

PLz anwser will mark brain list (find the area)

Mathematics

1 answer:

eduard3 years ago

5 0

Answer:

A = 24

Area for a triangle = 1/2 b * h

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Simplify 1 37/45 to the least you

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3.4444444 because u only need to divide 137 by 45

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3 years ago

Need ASAP. Only answer if ur confident in ur answer

RoseWind [281]

84 because I said so

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A bag of chips costs 59 cents. You need to buy seven bags. Approximately how much will that cost?

tino4ka555 [31]

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it'll cost about $4.13

Step-by-step explanation:

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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.

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3 years ago

Help me please! thank you!

Alisiya [41]

Answer:

1. 180

2. Yes

Step-by-step explanation:

2. Divide your answer from the first question by 70 and you get 2 hours and 57 minutes

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3 years ago

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