Select all the pairs that could be reasonable approximations for the diameter and circumference of a circle. Explain your reasoning. A.) 5 meters and 22 meters.

B.) 19 inches and 60 inches.

C.) 33 centimeters and 80 centimeters.

The Diameter is the line that goes though the center of the circle the diameter is usually about a third of the circumference so I would say the best answer is B.) 19 inches and 60 inches.

Step-by-step explanation:

Diameter= 19

Circumference= 59.690

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Step-by-step explanation:

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this