To solve the formula [tex]\( C = \pi d \)[/tex] for [tex]\( d \)[/tex], you need to isolate [tex]\( d \)[/tex] on one side of the equation.
Here are the steps:
1. Start with the given formula:
[tex]\[
C = \pi d
\][/tex]
2. To isolate [tex]\( d \)[/tex], divide both sides of the equation by [tex]\( \pi \)[/tex]:
[tex]\[
\frac{C}{\pi} = d
\][/tex]
3. This simplifies to:
[tex]\[
d = \frac{C}{\pi}
\][/tex]
Thus, the correct answer is:
A. [tex]\( d = \frac{C}{\pi} \)[/tex]