Answer:
D
Step-by-step explanation:
11 per 1,000
 
        
                    
             
        
        
        
Answer:
-5.2, -4.75, -9/2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
c = -3
Step-by-step explanation:
7 = -3c -2
3c = -2 -7
3c = -9
c = -3
 
        
                    
             
        
        
        
Answer:
The new ramp must be 54 inches long than the old ramp to meet the requirement of the new law
Step-by-step explanation:
Old height to length ratio is: 
 h : l =  2 : 15. 
Height of old ramp h = 12
Length of old ramp can be find out by putting h  = 12 in the above ratio

Length of old ramp = 90
Height to length ratio by current law:
h : l = 1 : 12
Height will be the same i.e. h = 12

Length of new ramp = 144
How much longer the new ramp should be to meet the new ratio law:
New length - Old length = 144 - 90 = 54 inches