Answer:
[tex]4245.28[/tex]
Step-by-step explanation:
The formula for the are of a circle is [tex]A=[/tex] πr²
however we will substitute 3.14 for π
[tex]d=2r[/tex], diameter is equal to twice the radius of a circle, dividing the radius by 2 will give you the radius, [tex]\frac{d}{2}=r[/tex]
[tex]\frac{78}{2}=39[/tex], [tex]r=39[/tex]
[tex]\frac{26}{2} =13[/tex], [tex]r=13[/tex]
[tex]A=(3.14)(39)^{2}[/tex], [tex]A=4775.94[/tex]
[tex]A=(3.14)(13)^{2}[/tex], [tex]A=530.66[/tex]
We can calculate the difference of the areas through subtraction
[tex]4775.94-530.66=4245.28[/tex]
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