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navik [9.2K]
3 years ago
5

These types of angles have a sum of 180 degrees​

Mathematics
1 answer:
Helen [10]3 years ago
7 0

Answer:

right angle

Step-by-step explanation:

a right angle is an angle that is exactly 90 degrees by adding two of them together you get 180 degrees.

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Dairy cows at large commercial farms often receive
IrinaK [193]

Answer:

a) The 99% confidence interval for the true mean milk production is (26.35 kg/d, 29.65 kg/d).

b) They would need to use a confidence level of 94.52%.

Step-by-step explanation:

a)

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample. So

M = 2.575*\frac{2.25}{\sqrt{12}} = 1.65

The lower end of the interval is the mean subtracted by M. So it is 28-1.65 = 26.35 kg/d

The upper end of the interval is the mean added to M. So it is 28 + 1.65 = 29.65 kg/d.

The 99% confidence interval for the true mean milk production is (26.35 kg/d, 29.65 kg/d).

(b) If the farms want the confidence interval to be no wider than 1.25 kg/d, what level of confidence would they need to use?

Now we want to find the value of z when M = 1.25. So:

1.25 = z*\frac{2.25}{\sqrt{12}}

0.6495z = 1.25

z = 1.92, that has a pvalue of 0.9726.

So the confidence level should be 1 - 2*(1-0.9726) = 0.9452

They would need to use a confidence level of 94.52%.

3 0
3 years ago
Using 10% as a benchmark, 20% of 390 can be found by adding 38 + 40.<br> True<br> O False
taurus [48]

Answer:

The answer is false! Good luck my guy

Step-by-step explanation:

5 0
2 years ago
A triangle has side lengths that are 8 cm, 15 cm, 17 cm. Is this a right triangle?
Alik [6]

Answer: A triangle has side lengths of 8 cm, 15 cm, and 17 cm. classify it as acute, obtuse, or right. Well, since 8^2 + 15^2 = 17^2, the sides fit the Pythagorean Theorem and thus it must be a right triangle.

Step-by-step explanation:

A triangle has side lengths that are 8 cm, 15 cm, 17 cm. Is this a right triangle? A triangle has side lengths of 8 cm, 15 cm, and 17 cm. classify it as acute, obtuse, or right. Well, since 8^2 + 15^2 = 17^2, the sides fit the Pythagorean Theorem and thus it must be a right triangle.

5 0
3 years ago
Is this standard form <br>25x - 80y = 160​
kvv77 [185]

Answer:

true

Step-by-step explanation:

because the variable terms are in the left side of the equation and everything else in right side.

5 0
3 years ago
A store sells small notebooks for $7 and large notebooks for $10 if a student buys 6 notebooks and spends $51 how many of each s
Finger [1]
He bought 3 small notebooks (3*7=21) and 3 large notebooks (3*10=30)
21+30=51
5 0
3 years ago
Read 2 more answers
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