A circle with radius of 9 cm sits inside a circle with radius of 11
1 answer:
Ok so to answer this, we first need to figure out the area of both circles
we will use the formula A=πr²
so our two areas end up being 121π and 81π
now all we do is subtract the smaller from the larger
121π - 81π = 40π
shaded region = 40π
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is the answer
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Answer:
The correct answer is "
".
Step-by-step explanation:
Given:
n = 21
s = 3.3
c = 0.9
now,


⇒
=
= 
⇒
= 
hence,
The 90% Confidence interval will be:
= 
= 
= 
= 
(5x+7) + (8x-21) = 90
13x-14 = 90
13x= 104
X=8
The angle measurements are 47, and 43
The answer is 4 x 1 3/4 =4 12/16
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