What's the word name for 20,004? A. Two thousand four B. Twenty thousand four C. Twenty thousand forty D. Two hundred thousand f
1 answer:
You might be interested in
The area of a shape is the amount of space it can occupy.
<em>The value of r is 13</em>
From the question (see attachment), we have:
--- area of the shaded region
--- the width of the shaded region
The area of the complete circle would be:
The area of the small circle is:
So, the area of the shaded region is:
Substitute known values
Substitute 2 for w
Expand
Open brackets
Cancel out line terms
Divide through by 4
Factor out pi
Divide through by pi
Substitute 22/7 for pi
Using a calculator, we have
Solve for r
Hence, the value of r is 13
Read more about areas of circles at:
