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3 years ago

There are 24 students in homeroom 218. 7/12 of the students are girls. How many girls are in homeroom 218?

1 answer:

8 0

There are 14 girls in HR 218 because 24/12 is 2, meaning that the ratio needs to be multiplied by 2/2 in order to figure out what 7/12 is. 7/12*2/2 is 14/24, therefore there are 14 girls in HR 218.

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Assume the radius of a circle is 5.7 inches. This measurement was performed with a

Taya2010 [7]

The area of the circle based on the radius given is 102.1 inches ²

<h3>How to calculate the area?</h3>

It should be noted that the area of a circle is calculated thus:

= πr²

where r = radius

π = 3.142

Therefore, when the the radius of a circle is 5.7 inches. This will be calculated for the area thus:

= πr²

= 3.142 × 5.7²

= 3.142 × 32.49

= 102.1 inches ²

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100 is 86% of what number

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3 years ago

Of 97 adults selected randomly from one city, 63 have health insurance. Create a 95% confidence interval for the true proportion

Flura [38]

Answer: 95% confidence interval would be (0.555,0.745).

Step-by-step explanation:

Since we have given that

n = 97

x = 63

So, we get that

$\hat{p}=\dfrac{x}{n}=\dfrac{63}{97}=0.65$

At 95% confidence interval , z = 1.96

so, Margin of error would be

$z\times \sqrt{\dfrac{p(1-p)}{n}}\\\\=1.96\times \sqrt{\dfrac{0.65\times 0.35}{97}}\\\\=0.095$

So, interval would be

$p\pm 0.095\\\\=0.65\pm 0.095\\\\=(0.65-0.095,0.65+0.095)\\\\=(0.555,0.745)$

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Step-by-step explanation:

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tatyana61 [14]

Answer:

There are <u>77</u><u> girls</u> in the class when there are 49 boys.

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3 years ago

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