There is a significant rain shadow effect east of the Rockies. One prime example is Denver. Over the course of a year it would typically receive ~20 inches of rain, but many locations to the west of the continental divide receive as much as 40 inches of rain a year. (It's important to note that the rain shadow effect only impacts storms and winds traveling against the mountains. If a storm travels south to north, the effect is severely diminished and can result in a situation where the lee side of the mountains receives more rainfall than the wind side of the mountains.
It's 3...
First you add 3 to both sides.(1/3x^2=3)
Then multiply both sides by 3. (x^2=9)
Then take the square root of both sides. (x=+-3)
Finally since it is asking for the positive solution, you can remove the negative sign and so the answer is 3.
A—A because we can use technology to our advantages
1) prevailing westerly winds
2)the North Atlantic Drift ocean current
ႊ့These two moderates much of the air temperature over Northwestern Europe.
Hope this helps!