Elspeth knows that pi x r = 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 pi.
she could divide 9.42 by 2 to find the radius, then square the radius.
she could divide 9.42 by pi to find the radius, then multiply 9.42 by the radius.

Option 1st is correct

she could multiply 9.42 by 2 to get the circumference

Step-by-step explanation:

Circumference of a circle(C) is given by:

where, r is the radius of the circle.

As per the statement:

Elspeth knows that = 9.42 cm

Substitute in [1] we have;

Therefore, she could multiply 9.42 by 2 to get the circumference