Find the value of X. Help please

Answer this question! 30 points and brainliest! only if you know the answer.

The volume of a cube is 8 in to the 3rd power. how long is each side?

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need