Answer:
-4 units
Explanation:
Using the midpoint method, Blake's income elasticity of demand for generic potato chips is given by the change in demand (D) multiplied by his average income (I), divided by the change in income multiplied by the average demand:
Blake's income elasticity of demand is -4 units.
There were 72 (108 - 36) more maple trees in the woodlot before the bug problem. There were 108 maple trees in the woodlot before the bug problem. There are 36 maple trees in the woodlot after the bug problem.
The following information is given in the question:
Ratio of maple trees to oak trees before bug problem = 9:5
Ratio of maple trees to oak trees after replanting = 3:11
Total number of oak trees after replanting =132
Total number of trees in the woodlot is the same before and after the bug problem.
Let the number of maple trees after replanting be 'x'
From the data above, we can find the number of maple trees after replanting as follows:
So, number of maple trees after replanting in the woodlot are 36.
Let number of maple trees before bug problem be 'z'.
We can find the number of maple trees before bug problem as follows: