TOUGH GUY wrote:
Based on this yearâ€™s costs, an orcharde grower budgets P dollars for planting N new trees next year. If the average cost of planting each tree were to increase 25 percent from this yearâ€™s cost ,then the greatest number of trees that the orchard grower could plant next year using P dollars would be.
average cost = (budget for planting)/(total trees)
The average cost of planting tree this year = P/N
The average cost of planting tree next year increase 25% = (P/N)' = 1.25(P/N)
Assume N' is the plant that can be growed next year with the same amout budget P
=> 1.25(P/N) = P/ N'
N' = P/(1.25P/N) = N/1.25 = 4N/5 = 0.8N
N' is 80% of N thus the owner can grow 20% less than last year
A. is the answer