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PLEASE HELP ME! URGENT!!
What is the DIFFERENCE, in centimeters, between the
Circumference of the Inner circle and the circumference of the
Outer circle? Use 3.1415 for 7.

PLEASE HELP ME URGENT What is the DIFFERENCE in centimeters between the Circumference of the Inner circle and the circumference of the Outer circle Use 31415 fo class=

Respuesta :

isabelguerrette
2•3.1415•9 = 56.547 for outer circle
9-2 = 7for radius of inner circle
2•3.1415•7 = 43.981
56.547 - 43.981 = 12.566
rounded to the nearest hundredth is 12.57
clarch19

Answer:

12.566 m or 1,256.6 cm

Step-by-step explanation:

Find the circumference of both circles and subtract the circumference of the smaller circle from the larger circle.

C = 2πr or πd

C (larger) = 2(2+9)π or 22π

C (smaller) = 2(9)π or 18π

Difference = 4π or 4(3.1415) which equals 12.566