A circle equation is :
( x - p )² + ( y - q )² = r², where p and q are coordinates of the center.
The position of the source is : ( - 6, - 4 ) and the range :
r² = 36 ⇒ r = 6
The answer is
A. Linda has $1,500 in a bank account that pays 3% annual interest.
(7)^2-4(5)(-6)=
49+120=169 is the answer