Answer:
Step-by-step explanation:
If this was an entire circle, the area could be found by using
Area = pi * r^2 where r = 9
To take the central angle into account, use this formula
Area = 120/360 * pi * r^2
Area = 1/3 * pi * 9^2
Area = 27 pi
area = 84.78 cm^2 which isn't there.
Answer:
b
Step-by-step explanation:
I think
8/4 should work, because the numerator's higher than the denominator.
The standard deviation is 1.43 below the mean
<h3>How to determine the number of standard deviation?</h3>
The given parameters are:
Mean = 98.249
Standard deviation = 0.733
x = 97.2
To calculate the number of standard deviation below the mean, we use

So, we have:

Evaluate the like terms

Divide both sides by -0.733
n =1.43
Hence, the standard deviation is 1.43 below the mean
Read more about standard deviation at:
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Answer:
320 cm³
Step-by-step explanation:
none of the above
8 × 10 × 4
80 × 4
320 cm³