What's are you trying to find?
1) We know that volume= base area x height, so 306.52= 19.4 x height.
To find the height you have to divide 306.52/19.4 which would give you the height. The height is 15.8m.
Your answer is 23.31538291 feet.
You can use the distance formula to find the distance between any two points ion the plane. In this case, look carefully at the coordinates:
R(-1, 7) and T(-7, 7), Notice they both have y-coordinate 7. That means they are both on the same horizontal line. To find their distance, just subtract -7 from -1 and take the absolute value.
|-1 - (-7)| = |-1 + 7| = |6| = 6
The distance is 6 units