Need steps to solve this: auto sales parts had a decreased of 20.5% this month compared to last month ,if sales this month were $75,366,what were the sales last month?

  $96,008

Step-by-step explanation:

The verbal description of the relationship translates to ...

  (last month's sales) -21.5%×(last month's sales) = $75,366

Simplifying, we have ...

  0.785 × (last month's sales) = $75,366

Dividing by the coefficient of the variable, we find ...

  (last month's sales) = $75,366/0.785 = $96,007.64

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The sales last month were $96,008.

the answer is  

a.

4,624π mm2

step-by-step explanation: