Are buying a drink and buying popcorn independent or dependant events

Which equation represents a circle with a center at (–3, –5) and a radius of 6 units? (x – 3)2 + (y – 5)2 = 6 (x – 3)2 + (y – 5)2 = 36 (x + 3)2 + (y + 5)2 = 6 (x + 3)2 + (y + 5)2 = 36

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

How do you find the circumfrance of a circle?