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OleMash [197]
3 years ago
10

Somenone help im faling horribly there is two qestion I need help on any one know both

Mathematics
1 answer:
Crazy boy [7]3 years ago
7 0
C = 2πr
C = 2(3.14)(2.5)
C = 15.7 = 16 cm is your answer.

282.6 m = πD
282.6 m = (3.14)D
282.6 m/3.14 = 3.14/3.14 x D
90 m = D
90 meters is the diameter.

hope this helps you!!!
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Please help asap there both together
lana66690 [7]

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Answer: Chris made a mistake in step 2 -C

4 0
3 years ago
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On day two of a study on body temperatures, 106 temperatures were taken. Suppose that we only have the first 10 temperatures to
NemiM [27]

Answer:

The 95% confidence interval for the mean of all body temperatures is between 97.76 ºF and 99.12 ºF

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 10 - 1 = 9

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 9 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.2622

The margin of error is:

M = T*s = 2.2622*0.3 = 0.68

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 98.44 - 0.68 = 97.76 ºF

The upper end of the interval is the sample mean added to M. So it is 98.44 + 0.68 = 99.12 ºF

The 95% confidence interval for the mean of all body temperatures is between 97.76 ºF and 99.12 ºF

4 0
3 years ago
What is the sign of -9. (0/-3)
katovenus [111]

Answer:

- is the answers for the question

Step-by-step explanation:

please mark me as brainlest

4 0
3 years ago
Which 2 triangles are similar ​
mixer [17]

Answer:

Triangle A and B

Step-by-step explanation:

The lengths from triangle A is being doubled to make the lengths of triangle B. They also have the same angles.

7 0
3 years ago
I need help with this
Llana [10]

Answer:

? = 4 units

Step-by-step explanation:

'2'  is to  ' 7+2 '     as  ?   is to   '14 + ? '

2/ 9 = ? / (14 + ?)      cross mutiply

28 + 2? = 9?

28 = 7?

? = 4

4 0
2 years ago
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