Answer:
E
E is the only one that ends with 70 and is also all multiples of 6.
Answer:
It's where they meet! I can't really see the coordinate clearly, but if I could I would tell you already.

r - radius, h - height
The diameter is twice the radius.

The answer is c. 791.3 m³.
To find the slope, use the equation
m = (y2-y1)/(x2-x1)
Since we have 2 coordinates, we can use the formula.
m = (-4-5)/(-2-10) = (-9)/(-12) = 3/4. The slope is 3/4. Hope this helps.