What is the area of a sector with measure of arc equal to 90° and radius equal to 1 foot? 0.25 sq. ft. 0.5 sq. ft. sq. ft.

If the sector 90º it means it's a quadrant (quarter of a circle) since:

360 / 4 = 90

The formula to finding the area of a quadrant is:

Hope it helped,

BioTeacher101

step-by-step explanation:

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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: