Difficulty is defined by (a) frequency of use, (b) frequency of spelling pattern, and (c) developmental norms. It is not difficult, then, for teachers to place students with words of appropriate difficulty based on simple measures of instructional level (Schlagal, 1996).
If one assumes that shifts in the supply curve of ethanol are solely due to the changing price of corn, then, up to an ethanol price of $2.90, the price of corn completely determines the price of ethanol. In other words, the price of corn drives the price of ethanol, not the other way around. This is actually quite logical since the amount of ethanol used is essentially fixed; consequently, something else must be driving the price of ethanol.
John used to grow potatoes at his farm, but once ethanol started being used in gasoline, he switched over to growing corn. 11 people found this helpful. Ethanol, or alcohol, is one of the worst drugs because it is addictive and poisonous to the body when it is consumed frequently and in large quantities.