Find the equation for the<br /> following parabola.<br />
Focus (0,5)<br />
Directrix y = -5<br />
A. y2 = 20%<br />
B. X2 = 5y<br />
C. X2 = 20<br />
D. y2 = 5x<br />​

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

step-by-step explanation:

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your answer is

a.

5

step-by-step explanation: