Find the area and circumference of a circle of 12 inches diameter

AREA!!!

To find the area of a circle, you use the equation pi r squared

since the diameter is 12, the radius is 6. So r squared is 36, multiplying that by pi we get inches squared.

CIRCUMFERENCE!!

The formula for finding the circumference is pi d or pi times diameter

Doing that we get inches squared.

Normally, schools and tests with have pi as 3.14, so you could add that into the equations, but only if it asks for you to. These solutions are only if the question didn't say anything about using 3.14 instead of pi.

Any questions?

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: