A local public library decides to track the number of hours that a certain computer is being used. The table represents the numb
2 answers:
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Answer:
--- small circle
--- big circle
Step-by-step explanation:
Given
-- sum of areas
Required
The radius of the larger circle
Area is calculated as;
For the smaller circle, we have:
For the big, we have
The sum of both is:
Substitute:
Substitute
Factorize
Divide both sides by
Divide both sides by 5
Take square roots of both sides
The radius of the larger circle is: