Question

Elspeth knows that .πr = 9.42 cm. What would she need to do to find the circumference?
She could multiply 9.42 by 2.
She could multiply 9.42 by .
She could divide 9.42 by 2 to find the radius, and then square the radius.
She could divide 9.42 by & to find the radius, and then multiply 9.42 by the radius.

Answer 1

To find the circumference of a circle, you would use the formula \( C = 2\pi r \). Given that \( \pi r = 9.42 \) cm, we can infer that to find the circumference, Elspeth can multiply \( \pi r \) by 2.

So, the correct approach for her would be:
- **She could multiply 9.42 by 2.**

This would provide her with the circumference of the circle.