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KatRina [158]
3 years ago
9

Carson wants to construct a triangle with side lengths of 4 inches, 7 inches, and 12 inches. Which best describes a triangle wit

h those side lengths
1)Nonexistent
2)Ambiguously defined
Mathematics
1 answer:
andrey2020 [161]3 years ago
3 0

Answer: 2

Step-by-step explanation: Of course you probably never learned this

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A physicist examines 25 water samples for nitrate concentration. The mean nitrate concentration for the sample data is 0.165 cc/
xz_007 [3.2K]

Answer:

The 80% confidence interval for the the population mean nitrate concentration is (0.144, 0.186).

Critical value t=1.318

Step-by-step explanation:

We have to calculate a 80% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=0.165.

The sample size is N=25.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

s_M=\dfrac{s}{\sqrt{N}}=\dfrac{0.078}{\sqrt{25}}=\dfrac{0.078}{5}=0.016

The degrees of freedom for this sample size are:

df=n-1=25-1=24

The t-value for a 80% confidence interval and 24 degrees of freedom is t=1.318.

The margin of error (MOE) can be calculated as:

MOE=t\cdot s_M=1.318 \cdot 0.016=0.021

Then, the lower and upper bounds of the confidence interval are:

LL=M-t \cdot s_M = 0.165-0.021=0.144\\\\UL=M+t \cdot s_M = 0.165+0.021=0.186

The 80% confidence interval for the population mean nitrate concentration is (0.144, 0.186).

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3 years ago
3) Construct triangle PQR such that PQ = 6 cm, angle PQR =
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Step-by-step explanation:

kfucmc!fxlkdf?c

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c

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What does it mean to say that a data point has a residual of 0
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<span>It means that the point lies directly on the regression line.
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The number 1 is an example of an element in the set of natural numbers. true or false​
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Your answer is True!

Some other examples of an element in the set of natural numbers are 2, 3, 4, 5, etc.

Hope this helps you!

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3 years ago
Salut! <br> |4x^2+9x-9|=0 <br> X= ? <br> Multumesc in avans :D
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X=3 or -3/4.<span>Îmi pare rău că nu mi-am arătat munca</span>
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