Answer:8 planes are shown in the figure
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
6.78ft/sec
Step-by-step explanation:
From the question, dx/dt= 3.9 ft/sec
We are looking for Dy/dt
From geometry,vof this case the relationship between x and y is needed here, there is two similar triangle that exhibited by the man and the lamb
12/y= 5.1/(y-x)
Then ,cross multiply, we have
12(y-x)=5.1y
12y-12x=5.1y
12y-5.1y=12x
6.9y=12x
y=( 12/6.9)x
Differentiating implicitly the bother sides with respect to t, we have 
Dy/dt= ( 12/6.9)dx/dt
But dx/dt= 3.9 ft/sec
Then Dy/dt= ( 12/6.9)× 3.9
Dy/dt=6.78ft/sec
Hence, the rate that the tip of the person's shadow moves away from the lamppost when the person is 9 ft away from the lampost is 6.78ft/sec
CHECK THE ATTACHMENT FOR THE FIQURE
 
        
             
        
        
        
Answer:
x=-1/2
Step-by-step explanation:
Move -2x to the other side by adding 2x on both sides:
12x+8=2
Move 8 to the other side by subtracting  8 on both sides:
12x=-6
Divide by 12 on both sides:
x=-1/2
Hope this helps!
 
        
                    
             
        
        
        
The answer is c.its written that their can be multiple answers or single
        
             
        
        
        
Answer:
I think the answer would be 79200 feet as 1 miles = 5280 feet