Answer:
The circles are similar.
Step-by-step explanation:
You can move the small circle 3 units to the right and then 5 units up. The center of the small circle will also be the center of the larger circle. Then you dilate the small circle by a scale factor of 5 to get the larger circle.
(z - 5) (z +3)
z*z = z^2
z*3 = 3z
z^-5 = -5z
-5*3 = -15
z^2 + 3z - 5z - 15
f(x) = 3900 * (1 - 0.35)^x
0.5 days = 12 hours
f(12) = 3900 * (1 - 0.35)^12 = 22.18