Answer:
311 cm squared
Step-by-step explanation:
Formulas/things to know:
area of circle = pi times r^2
diameter = r * 2
pi = 3.14159
r = radius
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CIRCLE 1:
diameter 36, radius = 36/2 = 18
area of circle = pi times 18^2
3.14159 times 324
= 1017.87601976
CIRCLE 2:
diameter 30, radius = 30/2 = 15
area of circle = pi times 15^2
3.14159 times 225
= 706.858347058
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Great, now we can calculate the difference between the areas!
1017.87601976 - 706.858347058
= 311.017672702
and then round to the nearest square centimeter: 311
answer: 311 cm squared
note: make sure to round at the end, not after calculating area for the most accurate result! :) Hope this helped
