V=(4pr^3)/3 if r=12
V=2304p in^3
4(c-d) is the answer bc the difference of (c-d) is done first, then multiplied by 4
We know that the ratio is;

The angles in a triangle add up to give 180°
We can think of there being twelve "parts" that add up to 180°

So our ratio is;

So the smallest angle is 30°
Multiples of 50 are 3000, 450, 50, and 500 and the rest are not multiples of 50