Answer:
-5y + 8x
Step-by-step explanation:
A hectare (ha) is the unit of area that can be used for that purpose.
It is roughly equivalent to 2.5 acres. It is equivalent in area to a square 100 m on a side. (10,000 m²).
Diameter is 6 so radius is 3, and the height is 3 times the radius = 9.
Volume is pi(3.14) * 3^2 * 9 = 254.34