Guyzz37 Guyzz37

17-05-2018
Mathematics

contestada

PLZZ ASAP THIS IS MY LAST QUESTION ON THE QUIZ
At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 11 m. The inner edge of the sidewalk is a circle with a radius of 9 m. (a) Write and simplify an expression for the exact area of the sidewalk. (b) Find the approximate area of the sidewalk. Use 3.14 to approximate π.

Respuesta :

jspjulie jspjulie

17-05-2018

634.28m
C=pir^2
11^2 = 121 (3.14) = 379.94
9^2 = 81 (3.14) = 254.34
add together = 634.28

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