Answer:
the "b" term is the term "-5 x" in the final quadratic expression
Step-by-step explanation:
Normally the "b" is the "linear term" in a quadratic equation.
So, perform the product of binomials and combine like terms to identify the final "b" term of the quadratic expression you get:

Therefore the "b" term is the term "-5 x" in the final quadratic expression.
Set up a ratio to compare the values, then solve for the missing value (y):
:
FbjfunbbhdzDkdghkjccghmcxdjkcykdkkxtn
The formula is C=2(3.14)r
So we plug in the radius and multiply.
C=2(3.14)(5)
C=6.28x5
C=31.4
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hope it helps