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Q: If x equals 2 what is x times pi?
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Area of a circle with a radius of 12?

Area of a circle = Pi times r^2. r=12 A = pi x (12^2)= pi x 144 equals approximately 452.3893421


How do you multiply two times pi times two?

2 x pi x 2 = 4 x pi


What is the Surface Area of a cylinder with diameter of 12 cm and a height of 20 cm?

(12 x "pi" x 20) + 2(36 x "pi") which equals 314 x "pi" which equals about 985.96 when pi is 3.14


What is the volume of a cylinder with a height of 5 and radius of 2?

The volume of a cylinder equals the area of the base times the height, which equals pi x radius squared x height. Inserting the numbers, V = pi x (2 m.) squared x 5 m. = pi x 4 m. squared x 5 m. = 20 x pi meters cubed or 20 x pi cubic meters.


How do you find the circumference of a circle with a radius of 3.5?

Two times the radius times pi equals the circumference of a circle. 2 x 3.5 = 7 7 x pi = 7 x 3.1416 = 21.99 or about 22


What is the diameter of a circle if the circumference is 7?

divide dy pi. the rule is diiameter (or 2 radius) multiplied by pi equals circumference so: 2 pi x radius= circ and, since diameter is 2 times the radius, pi x D= circ


If you double the radius of a circle what happens to the area?

If you double the original radius, the area will become 4 times what it was. The area of a circle is pi*r^2 = A. If our new radius (lets say x) is double (x=2r), we have pi*x^2 = pi*(2r)^2, which equals 4*pi*r^2 = 4A, or 4 times the original area.


If f x equals sin2 x then f pi over 2 equals?

it equals 1


What is pi times 13?

Pi sorta equals 3.143.14 x 1340.82 (Approximate, but not by much)


What is the equation of the line tangent to the curve y equals cos x at the point x equals pi over 6?

y = 2(x) - (pi/3) + (sqrt(3)/2)


The radius of a circle is x plus 4 what is the circumference?

Circumference = (2) x (pi) x (Radius)= (2 pi) times (X + 4)= same as (2 pi X) + (8 pi)= same as [ pi (2X + 8) ]


What is the formula for finding the circumference of a circle?

The formula for the circumference of a circle is 2πr, or πd.C = pi x d (pi x diameter)or:C = 2 x pi x r (2 times pi times radius)(Pi or π is approximately 3.1416)