Which causes objects in the universe to resist a change in speed or direction?
gravity
inertia
motion
orbit

Dall of the above all of the choices make sense

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

2. x2 + 8x + 12 = 0 to prove: x = -6 or x = -2