12.0014 teacher helped me to make sure it was right
Try this solution:
Common view of the equation of the circle is (x-a)²+(y-b)²=r², where point (a;b) is centre of the circle, r - radius.
1. using the coordinates of the centre and point (2;13) it is possible to define the radius of the circle: r=√(5²+12²)=13;
the equation is (x+3)²+(y-1)²=13² or (x+3)²+(y-1)²=169;
2. using the coordinates of the centre and the radius: (x-2)²+(y-4)²=6² or (x-2)²+(y-4)²=36.
Number 13 is c. Figure D
Number 14 is b. Figure D
Answer:
Surface area is 72
The surface area unit is square centimeters, or 
Hope this helps!
Animators can create mountains using fractal geometry.
They create these mountains by breaking large triangles into smaller and smaller triangles, as a result, these large triangles end up looking like mountains.
An animator became a millionaire because he discovered this. He sold his mountain animations to air travel companies who wanted to place photographs of planes behind mountains in their advertisements.
It would've been expensive to take photos of planes behind real mountains, so these air travel companies decided to buy this animator's animations of mountains in order to save money.
What happened to this animator? Well he got hired by Pixar to help create the movie Toy Story and became even wealthier.
