409,200,000,000= 4.092 × 10^11
C=<span>6.28<span>r let me know if you need more help</span></span>
Answer:

Step-by-step explanation:
Given
See attachment
Required
Find x
The relationship between x, 47 and
is:

i.e.

Solving further:

Make x the subject



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<em> --- approximated</em>
Answer: 13.96 in²
<u>Step-by-step explanation:</u>
d = 2r
16 = 2r
8 = r

180(θ) = 25(π)
θ =
θ = 
A =
r² θ
= 
= 
= 13.96
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Answer: 12π
<u>Step-by-step explanation:</u>
s = rθ
= 60
= 12π
*************************************************************************
Answer: 22.440 cm²
<u>Step-by-step explanation:</u>
A =
r²θ
=
(10)²
= 
= 22.440
*************************************************************************
Answer: 270°, 630°, -450°, -810°
<u>Step-by-step explanation:</u>
positive: -90 + 360 = 270
270 + 360 = 630
negative: -90 - 360 = -450
-450 - 360 = -810
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Answer: 
<u>Step-by-step explanation:</u>

= 
= 

= 
= 
If you subtract another 2π, you will end up with a negative value. The question asks for the smallest positive value.