OAB is a sector of a circle with radius 9cm and center O. The angle at O is 30°.

Area of sector = 21.195 cm²

length of arc =  4.71 cm

Step-by-step explanation:

Given:

Radius of circle (r) = 9 Cm

Angle at O = 30°

Find:

Area of sector.

length of arc.

Computation:

⇒ Area of sector = [θ/360]πr²

Area of sector = [30/360]3.14(9)²

Area of sector = 21.195 cm²

⇒ length of arc =  [θ/360]2πr

length of arc =  [30/360]2(3.14)(9)

length of arc =  4.71 cm

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

a ≈ 172.05

step-by-step explanation:

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