The circumference of a circle is 7π in. Find its radius, in inches.
2 answers:
Answer:
Step-by-step explanation:
<h2>Given :</h2>- The circumference of a circle is 7π in.
- Find its radius, in inches.
- r = c/2
where,
- r = radius
- c = circumference
⟼ r = c/2
⟼ r = 7×22÷7/2 in
⟼ r = 22/2 in
⟼ r = 11 in.
- Hence, radius is <u>11 inches.</u>
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Answer:
The Sample size is 1918.89035
Step-by-step explanation:
Consider the provided information.
It is given that 14 out of 105 samples failed.
Therefore p = 14/105 = 0.13 3... and q=1-0.133=0.867
Samples would be needed to create a 99 percent confidence interval.
Subtract the confidence level from 1, then divide by two.
By standard normal table z=2.5758≈2.58
Calculate the sample size as:
Where, e is the margin of error,
Substitute the respective values.
Hence, the Sample size is 1918.89035