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

huh? im pretty sure it is in 199

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)