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3 years ago

How do I do this....?

Mathematics

1 answer:

ioda3 years ago

6 0

Answer:

you plot the coordinates you have been given

Step-by-step explanation:

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"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

7 0

3 years ago

Find the Area of the figure below, composed of a parallelogram and two semicircles. Round to the nearest tenths place.

Mila [183]

Step-by-step explanation:

the total area = the area of full circle + the area of parallelogram = (π ×(8/2)²) + (28×7)

= (3,14 ×16)+(196)

= 50,24 +196

= 246,24

= 246,2

7 0

2 years ago

A. 3/22 <br> B. 3/7<br> C. 8/15<br> D. 8/11

Oliga [24]

Asked and answered previously.
brainly.com/question/10375997

The appropriate choice is ...
B. 3/7

8 0

2 years ago

64 times -7/8 minus 1/2

Vesna [10]

$64 \times (- \dfrac{7}{8}) - \dfrac{1}{2}$

$=-56 - \dfrac{1}{2}$

$=-56\dfrac{1}{2}$

3 0

3 years ago

I have a math question I need help answering.

aniked [119]

The answer should be $21,840.50

Explanation:

20000*1.045=a (first year)
a*1.045=b (second year)
b = 21840.5

6 0

2 years ago