Answer:
radius = 6
Step-by-step explanation:
The equation of a circle centred at the origin is
x² + y² = r² ←r is the radius
x² + y² = 36 ← is in this form
with r² = 36 ⇒ r = = 6
27-18= 9
9/18 x100= 50
There was a 50% increase in grey wolves
The discount rate is 60%. Hope this helps.