(x-h)^2+(y-k)^2=r^2
center is (h,k)
radius is r
given
center is (0,0
find radius
area=pir^2
144=pir^2
divide both sides by pi
144/pi=r^2
sqrt both sides
12/√pi=r
sub for r in the equation
(x-0)^2+(y-0)^2=(12/√pi)^2
x^2+y^2=(12/√pi)^2
the radius is 12/√pi, or (12√pi)/pi
that is the distance from 0 to any point on the circle
xints are (-12√pi)/pi and (12√pi)/pi
aprox
-6.77 and 6.77
round
-6.8 and 6.8
the x intercepts are x=-6.8 and 6.8 or the points (-6.8,0) and (6.8,0)
