Answer:
B
Explanation:
We want to solve for d.
Our given equation is C = πd, where π and d are multiplied together.
In order to solve for d, we need to isolate it; in other words, we need to move the π to the left side with C. To do so, we must "undo" the multiplication; and what's the "undo" for multiplication? It's just division.
Thus, we simply divide both sides by π to get:
d = C/π
Our answer is thus B.
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