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wolverine [178]
2 years ago
11

Which of the following figures has a circumference that is closest to 121 inches?

Mathematics
1 answer:
Eduardwww [97]2 years ago
3 0

Answer:

B

a circle with a diameter of 19.3 inches

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A student is decorating a circular picture frame that has a diameter of 8 inches. How many inches of fabric will the student nee
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Answer:

B

Step-by-step explanation:

Circumference is equal to \pi d

C=\pi d

C=\pi \times 8

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3 years ago
What percent represents the part of the model shaded green. A.60% B.62.5%. C.66.7% D.75%
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Answer:

60%

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3/5 = 6/10 = 60%

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Which story problems could be solved using the given equation? 15÷10=? Choose exactly two answers that are correct. Brandy bough
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Multiply by the reciprocal by 3 and divide the common denominator by 14
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The implications of a classical lras curve are that
ElenaW [278]

economies are always at full efficiency

b is the right answer but a is also a right answer

4 0
3 years ago
In a study of variation in systolic blood pressure upon application of leaches, it is found that the standard deviation of the 2
kondor19780726 [428]

Answer:

Test statistic is [(n - 1) *S^2  ]/    σ ^2 = [(22 - 1) *(3.9)^2  ]/    (3.4) ^2

with 21 degrees of freedom

Yes this data fits at the 10% level of significance,  so  I would not reject that statistic  of 3.9 mmHg  as a wrong standard deviation

Step-by-step explanation:

use the expression I attached in the image to find

[(n - 1) *S^2  ]/    σ ^2

where S = the standard deviation calculated from the sample of n  trials.

sigma is the population standard deviation.

[(22 - 1) *(3.9)^2  ]/    (3.4) ^2  =  21 * 15.21 / 11.56  =  27.6306

all we have to do now is to  make sure this number is in the  90 % confidence

interval.      remember this has 21 degrees of freedom,  look at the chi-squared chart.

11.5913  <   27.6306    <  32.67905

where 11.5913  is the lower bound of the chart

and  32.67905 is the upper bound

6 0
3 years ago
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