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monitta
3 years ago
7

How would you use a model to determine the approximate formula for the circumference of a circle with a diameter of 8 cm, and co

nnect the model to the actual formula?
Mathematics
1 answer:
Elenna [48]3 years ago
4 0
C = πd where:

C = circumference

d = diameter

Replace d with 8:

C = 8π
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2 years ago
Solve the formula K = 3M - 7 for M.
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Use the given information to find the length of a circular arc. Round to two decimal places.the arc of a circle of radius 11 inc
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Answer:

A

The  test statistics is  t  = -1.7

B

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Step-by-step explanation:

From the question we are told that

    The population mean is  \mu  =  47.2 miles/gallon(MPG)

    The sample size is  n =  250 \ van

     The  sample mean is  \= x  =  47.0

      The sample  standard deviation is  \sigma  =  1.9

      The level of significance is  \alpha  =  0.02

Given that the value which the manufacturer gave the automobile is  47.2 and  it is believed that this is not correct, then  

The  Null Hypothesis is  

        H_o  :  \mu = 47.2

The alternative Hypothesis  is  

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The test statistics can be mathematically evaluated as  

        t  =  \frac{\= x- \mu}{\frac{\sigma }{\sqrt{n} } }

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        t  =  \frac{\= 47- 47.2}{\frac{1.9 }{\sqrt{250} } }

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