Answer:
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San Andreas fault is scientifically known as a continental transform fault. This fault line extends over 750 miles through California. The tectonic boundary between the Pacific Plate and the North American Plate is horizontal to each other.
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A contour line is a line of 'equal height': every point on a contour is the same height above sea level.
The closer any two contour lines are the steeper the hill is: and the further apart they are the move level the ground.
If a group of contour lines suddenly move to form a V shape then the hill either has a promontory sticking out from it or a valley in it.
Basically, 2 grams of element X are needed to combine with 4 grams of element Y is order to produce the desired compound.
This means that the ratio between X and Y is 1:2.
Based on this, the amount of Y needed to combine with 42 grams of X is as follows:
amount of Y = 42 x (2/1) = 84 grams
The EPA sets the guidelines
