The weights of their backpacks would be discrete
Answer:
the answer is 12.7, you add four plus 8.7
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
