J
That's the only point within the circle, and it seems like the center. In these questions, just assuming it's perfectly in the center typically works.
A circle, of radius r = radius of the sphere
you can think of it in terms of projection the plan projection of the sphere is a circle.
Okay so the equation. Lets say e is explorers and v is flying vs and m = money.
e + v > or = 30.
80e + 5v =m.
e < or = 20\
v < or = 20.
Okay, the most money he could make would be if he made 20 explorers at 80 dollars and 10 vs at 5 dollars.
Total money...
1600 + 50 = 1650.
So he could make $1650.
A- (6,-3) B- (9,-3) C- (9,-7)
