Respuesta :
Answer:
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:
[tex]C = 2 \pi r[/tex]
where, r is the radius of the circle.
As per the statement:
Elspeth knows that [tex]\pi r[/tex]= 9.42 cm
Substitute in [1] we have;
[tex]C = 2 \cdot 9.42[/tex]
Therefore, she could multiply 9.42 by 2 to get the circumference
You can use the fact that the circumference of a circle is twice the radius times pi.
In order to find the circumference, Eispeth would need to do this:
Option A: She could multiply 9.42 by 2
What is the formula for finding the circumference of a circle with radius r units?
The formula for such circle's circumference is:
[tex]Circumference = 2 \times \pi \times r \: \rm \: units[/tex]
Since the diameter of a circle is twice the radius, we can also write:
[tex]Circumference = \pi \times d \: \rm \: units[/tex] where d is the diameter of the considered circle.
Using above, formula, as we're already given pi x r = 9.42 cm
The circumference = 2 x pi x r = 2 times 9.42 cm
Thus,
In order to find the circumference, Eispeth would need to do this:
Option A: She could multiply 9.42 by 2
Learn more about circumference of circle here:
https://brainly.com/question/15211210
