Respuesta :

Answer:

56.52

Step-by-step explanation:

You want to begin with plugging in a and b into the expression.

a=3

b=4

3.14(3(2)+3(4))

Then simplify

3.14(6+12)

3.14(18)=56.52

:))

Answer:

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Step-by-step explanation:

I hope this helped