In what direction do extra-tropical cyclones typically track across the united states

They are counterclockwise in the northern hemisphere, and clockwise in the southern hemisphere.

Explanation:

Owning to the effects of the Coriolis force the extratropical cyclones move in the counterclockwise direction in the northern hemisphere and to the opposite in the southern hemisphere, and they are also called s the midlatitude cyclone.  And they drive the air over the earth's surface and are capable of producing anything. In the united states, they move to form the south to the northern direction. And thus are given the warm waves in the U.S in their life cycle.

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.

5×^2+20-15 or -(5x^2-20+15)