It is an easier and faster way to write an equation for the slope of a line if you already have its points and slope.
The answer is 314,000,000 ft^2
pi r^2
3.14* 10,000^2
3.14*100,000,000
314,000,000
V = 4/3 * 3.14 * 9^3 = 3052.08
Answer is B
V=BH/3
V=(4)(6)/3
V=(24)/3
V=8