A) Perimeter of Trapezium = 8+5+6+15.5
 = 34.5in 
 Area= 1/2*(a+b)*h
 =1/2*(8+15.5)*4
 =47in^2
B)Perimeter= 12+6+8.5
 =26.5mm
 Area=1/2*b*h 
 =1/2*12*4
 =24mm^2
        
             
        
        
        
Answer:
114.31 nautical miles per day
Step-by-step explanation:
Use formula 

where S is the distance, t is time and v is rate.
If S=11431 nautical miles and t=100 days, then

 
        
             
        
        
        
Answer:
6...9...
Step-by-step explanation:
 
        
             
        
        
        
23 lines × 5 trees= 115 tree. or. 5 lines × 23 trees = 115 trees