Answer:
Khan Academy
The robot uses the expected amount of energy, but it doesn't filter the expected amount of air and water.
Step-by-step explanation:
x = 0
g²/f⁷h
Because f⁹-f²=f⁷ which leaves f⁷ on the bottom, g³-g=g² which leaves g² on the top, and h⁵-h⁴=h which leaves h on the bottom.
4√ y
.......................