Answer:
R=9
Step-by-step explanation:
the formula for area of a circle is pi r squared
where r denotes the radius of the circle
equating the formula for area with the area of the circle provided
p\i r squared = 81 p\i
r squared = 81
r = radical 81
r =9 inches
Solution: We are given:
The area covered by five great lakes in United States
square miles.
The area covered by the smallest of the great lakes, Lake Ontario
square miles.
The fraction of the area of Ontario lake to the total area of all the great lakes is:


Therefore, the simplest form of fraction is 

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