Answer:
Step-by-step explanation:
The standard form of the equation of a circle is
( x − a ) ^2 + ( y − b ) 2 = r ^2
where (a,b) are the coords of the centre and r , the radius.
x ^2 + y ^2 = 9
is in this form with a = b = 0 and r = 3
The center is (0,0) and the radius is 3
The equation of a circle is given by
(x-h)^2+(y-k)^2 = r^2
Where (h,k) is the center and r is the radius
(x-0)^2+(y-0)^2 = 3^2
45.1 km^2
hope this helps
have a good day :)
The answer is 20 because you plug in x=2 into f(x)
