Final answer:
To achieve Coastal Tea Company's blending goals, the best mix of Carolina and regular tea is 38 pounds of Carolina tea and 22 pounds of regular tea.
Step-by-step explanation:
To determine the best mix of Carolina and regular tea, we need to consider both the percentage of Carolina tea and the cost of the blend. Let's assume that x represents the weight of Carolina tea in the blend, in pounds. The weight of regular tea in the blend would then be (60 - x) pounds.
We need to find the minimum value of x that satisfies two conditions: the Carolina tea must make up at least 55% of the blend, and the average aroma rating of the blend must be at least 1.65.
The equation that represents the percentage condition is: (x/60) * 100 >= 55. This simplifies to x >= (55/100) * 60 = 33 pounds.
The equation that represents the aroma rating condition is: (2x + 1.2(60 - x))/60 >= 1.65. Solving this inequality, we find that x >= 37.2 pounds.
The minimum value of x that satisfies both conditions is 37.2 pounds. However, since the weight must be a whole number, we round up to 38 pounds. Therefore, the best mix of Carolina and regular tea would be 38 pounds of Carolina tea and (60 - 38) = 22 pounds of regular tea.