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Butoxors [25]
3 years ago
13

Which of the following situations does not represent a proportional relationship?

Mathematics
1 answer:
cluponka [151]3 years ago
5 0

Answer:

c

Step-by-step explanation:

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Hey! please help i’ll give brainliest
Dvinal [7]

Answer:

B. is the answer

hope this helps

have a good day :)

Step-by-step explanation:

4 0
3 years ago
A statistics professor randomly selects 31 students from their morning class and asks ``How much sleep did youget the night befo
Nikitich [7]

Answer:

The 95% confidence interval for the average sleep (in hours) that statistics students in the morning class got the night before is between 5.37 hours and 7.63 hours. This means that we are 95% that the true mean sleep that all statistics students in the morning class got the night before is between 5.37 hours and 7.63 hours.

Step-by-step explanation:

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

\alpha = \frac{1-0.95}{2} = 0.025

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 1-0.025 = 0.975, so z = 1.96

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.

M = 1.96*\frac{3.2}{\sqrt{31}} = 1.13

The lower end of the interval is the mean subtracted by M. So it is 6.5 - 1.13 = 5.37 hours

The upper end of the interval is the mean added to M. So it is 6.5 + 1.13 = 7.63 hours

The 95% confidence interval for the average sleep (in hours) that statistics students in the morning class got the night before is between 5.37 hours and 7.63 hours. This means that we are 95% that the true mean sleep that all statistics students in the morning class got the night before is between 5.37 hours and 7.63 hours.

5 0
4 years ago
Read 2 more answers
Robert is lying on the ground, looking at the top of a flagpole. The angle of elevation to the top of the flagpole is
NeTakaya

Answer:

Height of flagpole = 571 ft

Step-by-step explanation:

Given:

Angle of elevation to the top of the flagpole is 55° .

Distance from the eyes to the base of flagpole = 400 ft.

To find the height of the flagpole.

Solution:

We can draw the situation as a right triangle as shown below.

In triangle ABC.

BC=400\ ft

∠C= 55°

To find the length AB (height of the flagpole).

Applying trigonometric ratio :

\tan\theta=\frac{Opposite\ side}{Adjacent\ side}

\tan C=\frac{AB}{BC}

Plugging in values.

\tan 55\°=\frac{AB}{400}

Multiplying both sides by 400.

400\tan 55\°=\frac{AB}{400}\times 400

571.26=AB

∴ AB\approx 571\ ft

Height of flagpole = 571 ft

6 0
4 years ago
Express the ratio as a fraction in simplest form. 18 : 12
Mashutka [201]
The answer is 9:1. All you have to do is simplify it
7 0
4 years ago
A) Given that 4^-6×4^x=1, find the value of x.
Verizon [17]

Answer:

A: x = 6

i could only figure out a sorry

Step-by-step explanation:

5 0
3 years ago
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