The formula for circumference is C = 2<span>πr.
We already know that the radius of the circle is 21 feet, so let's plug that into the equation.
C = 2</span><span>π(21)
Now let's simplify
C = 6.28(21)
C = 131.9
131.9 is your circumference.</span>
Answer:

Last answer is correct
Step-by-step explanation:

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Answer:
nothing definite can be said and square
Answer:
g(-3) = -10
Step-by-step explanation:
All you have to do is plug -3 in for x!
g(-3) = 2(-3) - 4
g(-3) = -6 - 4
g(-3) = -10