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Talja [164]
2 years ago
5

These two images show steps in a proof of the Pythagorean theorem. Which

Mathematics
2 answers:
Katarina [22]2 years ago
6 0

Answer: B, the area of interior square in step 2 is greater than the combined area of the two interior squares in step 1.

Step-by-step explanation: I took the quiz and got it right

Vikki [24]2 years ago
5 0

Answer: i think it’s c or it’s a

Step-by-step explanation

I think it’s c or it’s a

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In a study to establish the absolute threshold of hearing, 80 male college freshmen were each seated in a soundproof room and a
Norma-Jean [14]

Answer:

Step-by-step explanation:

Hello!

To study the threshold of hering the researcher took a random sample of 80 male college freshmen.

The students underwent an audiometry test where a tome was played and they had to press a button when they detected it.  The researcher recorded the lowest stimulus level at which the tone was detected obtaining a sample mean of X[bar]= 22.2 dB and a standard deviation of S= 2.1 dB

To estimate the population mean, since we don't have information about the variable distribution but the sample size is greater than 30, you can use the approximation of the standard normal distribution:

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

Where the semiamplitude or margin of error of the interval is:

d= Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

Using a 95% level Z_{0.975}= 1.965

d= 1.965 * \frac{2.1}{\sqrt{80} }

d= 0.46

The point estimate of the population mean of the threshold of hearing for male college freshmen is X[bar]= 22.2 db

And the estimation using a 95%CI is [21.74;22.66]

I hope this helps!

8 0
3 years ago
Round 7 3/8 to the nearest whole number?!?
DIA [1.3K]

Answer:

7

Step-by-step explanation:

Everything including 1/2 and above rounds up to the next whole number.

3/8 < 4/8

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2 years ago
Help please............................
Vesnalui [34]

Step-by-step explanation:

csc x / (cot x + tan x)

Write in terms of sine and cosine.

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1 / [cos x + (sin²x / cos x)]

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cos x

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3 years ago
What is 10 2/1 divided by 2 1/4
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Step-by-step explanation:

6 0
2 years ago
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Making fractions equivalent
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where are the fractions?

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3 years ago
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