Pi is the ratio of the
to the
diameter of any circle.

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This value is the ratio of the circumference of a circle to its diameter and is called π (Pi).

Step-by-step explanation:

2500

step-by-step explanation:

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2