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asambeis [7]
3 years ago
15

Can u plz help me with this question?​

Mathematics
1 answer:
timurjin [86]3 years ago
3 0

Answer:

Rotation of 90 degrees counterclockwise about the origin

Step-by-step explanation:

well counterclockwise means you rotate the figure to the left and this figure is rotated to the left

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The National Center for Educational Statistics surveyed 5400 college graduates about the lengths of time required to earn their
fenix001 [56]

Answer:

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

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{1-0.9}{2} = 0.05

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 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error 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 = 1.645*\frac{1.9}{\sqrt{4500}} = 0.04

The lower end of the interval is the sample mean subtracted by M. So it is 5.4 - 0.04 = 5.36 years.

The upper end of the interval is the sample mean added to M. So it is 5.4 + 0.04 = 5.44 years.

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

3 0
3 years ago
Volume = 154 cm cubic
zheka24 [161]

Cylinder Volume

  • Level : JHS

V = hπr²

154 cm³ = 16 cm × 3.14 × r²

154 cm³ = 50.28 cm × r²

r² = 154 cm³ : 50.28 cm

r² = 3.0625 cm²

r = 1.75 cm

d = 2r

d = 2 × 1.75 cm

d = 3.5 cm

So, the diameter of the Cylinder is 3.5 cm

#LearnWithEXO

8 0
3 years ago
Express each ratio as a fraction in the simplest form.<br> 12 beetles out of 18 insects<br> .
slava [35]

Answer:

2/3

Step-by-step explanation:

12/6=2

18/6=3

so

the fraction is 2/3

i think this is what your teachers means, lmk if thats wrong

3 0
3 years ago
Please help me with this problem
diamong [38]
20%

(300-250)/250=0.2
8 0
3 years ago
Plz help quickly!!!! You will get 36 POINTS!!!
liq [111]
If clearer picture i may help for it is far to dark and clouded to read

4 0
3 years ago
Read 2 more answers
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