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3 years ago

Real fourth roots of 81

Mathematics

2 answers:

aleksandrvk [35]3 years ago

8 0

3 is real 4th roots of 81

Brums [2.3K]3 years ago

6 0

The real fourth root of 81 is 3

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In a sample of 41 temperature readings taken from the freezer of a restaurant, the mean is 29.7 degrees and the population stand

yKpoI14uk [10]

Answer: $=(29.1596\text{ degrees},\ 30.2404\text{ degrees})$

Step-by-step explanation:

Given: Sample size: n = 41

Sample mean $\overline{x}= 29.7$ degrees

Population standard deviation $\sigma=2.7$ degrees

Confidence level (c) = 80% =0.80

Significance level (a) = 1- c = 1-0.80 = 0.20

z-score for 80% confidence level : z = 1.2816 [from z-table]

Confidence level for population mean :-

$\overline{x}\pm z\dfrac{\sigma}{\sqrt{n}}$

$=29.7\pm ( 1.2816)\dfrac{2.7}{\sqrt{41}}$

$=29.7\pm ( 1.2816)\dfrac{2.7}{6.403124}$

$=29.7\pm ( 1.2816)(0.42167)$

$=29.7\pm 0.5404$

$=(29.7-0.5404,\ 29.7+0.5404)$

$=(29.1596,\ 30.2404)$

Hence, 80% confidence interval for the temperatures in the freezer $=(29.1596\text{ degrees},\ 30.2404\text{ degrees})$

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2 years ago

Brent would like to start a small landscape business this summer. He has a lawn mower, but needs a truck to carry the lawn mower

spin [16.1K]

Answer:

I would buy the 2000 Toyota Tundra. Yes it is the most expensive, but it is the newest so it should require less expense money for problems, it is a manual transmission 6 cylinder so it should get better gas mileage, and it has fewer miles. The rankings of these trucks are not provided, however a Toyota tundra is considered to be a workhorse in the truck. If this is an opinion question, that's my choice.

Step-by-step explanation:

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2 years ago

Find the slope a) -5, b) -1/5, c)5, d) 1/5,

Arturiano [62]

Answer:

The slope is a) -5.

Step-by-step explanation:

(-6, -4)

(-5, -9)

the difference in slope is $\frac{-9 - (-4)}{-5 - (-6)} = \frac{-9 + 4}{-5 +6} = \frac{-5}{1} = -5$

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3 years ago

PLEASE I AM IN DESPERATE NEED OF HELP

SSSSS [86.1K]

Answer:

I think the 3rd one

Step-by-step explanation:

Hope its right

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2 years ago

What divided by 6 equals 7

vivado [14]

Answer:

Step-by-step explanation:

You can prove this by taking 42 and dividing it by 6, and you will see that the answer is 7. Tip: For future reference, when you are presented with a problem like "What divided by 6 equals 7?", all you have to do is multiply the two known numbers together.

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3 years ago

Read 2 more answers