Answer:
all work is pictured and shown
 
        
             
        
        
        
Answer:
0.03865
Step-by-step explanation:
Since the true density for the two types of trees are given, we would evaluate the average for both of them
Low percentage of juvenile wood density = 0.523 and 0.0543
Average density = 0.523 + 0.0543/2
Average density = 0.55015
Moderate percentage of juvenile wood density = 0.489 and 0.0450
Average density = 0.489 + 0.0450/2
Average density = 0.5115
Therefore, difference in true average density for the two woods are = 0.55015 - 0.51150
 = 0.03865
 
        
             
        
        
        
Answer:
Here is how it should look
Step-by-step explanation:
 
        
             
        
        
        
The full cost would be £33.75