The correct answer is B) 9 m.
The measure of the sector of circle R is 32π/9 m. The measure of the central angle is 80°. This means that the sector is 80/360 = 2/9 of the circle. The area of a circle is given by A=πr², so the area of the sector is A=2/9πr². To verify this, 2/9π(4²) = 2/9π(16) = 32π/9.
Using this same formula for circle S, we will work backward to find the radius:
18π = 2/9πr²
Multiply both sides by 9:
18*9π = 2πr²
162π = 2πr²
Divide both sides by 2π:
162π/2π = 2πr²/2π
81 = r²
Take the square root of both sides:
√81 = √r²
9 = r
TABLE / BOX
| h ||||||| 0 | 1 | 2 | 3 | 5 | 9 | 12 | 13 | 15
| M(h) | 0| .1/.5 |.2/.5|.3/.5| 1 |1.8|2.4| 2.6| 3
I tried my best on putting it in order sorry if its not clear
make shure to put brainliest!