3 years ago

Pls help^^^^ i dont understand this hw

Mathematics

1 answer:

7nadin3 [17]3 years ago

8 0

Answer:

h=6y/q∧3

Step-by-step explanation:

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jarptica [38.1K]

Answer:

3.35

Step-by-step explanation:

look at the picture

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2 years ago

What are the roots of the equation x^2-10x+74=0x <br> 2−10x+74=0 in simplest a+bia+bi form?

laiz [17]

Answer:

x= 38/5

Step-by-step explanation:

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2 years ago

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A commonly used IQ test is scaled to have a mean of 100 and a standard deviation 15. A school counselor was curious about the av

Licemer1 [7]

Answer: (103.74,112.06)

Step-by-step explanation:

The confidence interval for population mean is given by :_

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 50

Sample mean : $\overline{x}=107.9$

Standard deviation : $\sigma=15$

Significance level : $\alpha: 1-0.95=0.5$

Critical value : $z_{\alpha/2}=1.96$

Then the 95% confidence interval for the student IQ in the school will be :-

$107.9\pm (1.96)\dfrac{15}{\sqrt{50}}\\\\\approx107.9\pm0.075\\\\=(107.9-4.16,107.9+4.16)=(103.74,112.06)$

Hence, the 95% confidence interval for the student IQ in the school= (103.74,112.06)

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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A rotating lawn is sprinkler sprays water in a circular area of grass, as shown in the picture. The diameter of the circle area

Ber [7]

Answer:

201.06 square feet.

Step-by-step explanation:

=> The diameter of a circle is equal twice its radius. So we divide the diameter by 2 to get its radius.

=> The area of any given circle is π times the square of the radius. The radius of this circle is equal to 8 feet.

=> Area of the circle = π × r² = 3.1415 × 8 feet = 201.056 square feet

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3 years ago