Urgent! The measure of central angle QRS is

8 TT

9

radians.

What is the area of the shaded sector?

361 units2

721 units2

1441 units2

3241 units2

c. 144π units²

Step-by-step explanation:

In the picture attached, the circle is shown.

Data

Area of the circle = π*r² = π*18² = 324π square units

The area of the circle is proportional to angle 2π radians. Therefore:

324π square units / shaded area = 2π radians / (8π/9 radians)

shaded area = (8π/9)/(2π)*324π

shaded area = (4/9)*324π

shaded area = 144π square units

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: