Find the circumference of the circle in terms of pi.
2 answers:
<h2>Answer:</h2>
Option: D is the correct answer.
The circumference of the circle in terms of pi is:
D. 78π in.
<h2>Step-by-step explanation:</h2>We know that for a circle with radius r the circumference of the circle is given by the formula :
Here in the given figure we have: Radius (r)= 39 in.
Hence, the circumference of the given circle is calculated as:
Hence, the circumference of circle is:
78π in.
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<h3>Answer: 60 degrees</h3>
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Explanation:
The given angle is ∅ = 300. This x value is between 270 and 360, so we're in quadrant IV (the southeast quadrant)
The rule to get the reference angle y for this quadrant is
Ф = 360-∅
This tells us the angle made with the positive x axis
Ф = 360-∅
Ф = 360-300
Ф = 60
A 60 degree angle forms with the positive x axis as shown in the diagram below.
Answer:
We have to find the z critical value at 100% - 90% = 10% level of significance.
Since the normal distribution has two tails, we therefore, need to divide the significance level into two tails with each tail having area of 5%.
Now using the standard normal table, the z critical is: