Answer:
100% increase from 100 is 200, the difference is 100. 
100% decrease from 100 is 0, the difference is -100
error means that you were quite a long way off from the true value.
 
        
             
        
        
        
Answer:
The volume of the triangular prism: 59.2  
 
The value of the concrete used is: 16*4 = $64
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached photo 
My answer: 
As we know that, the formula to find out the volume of the triangular prism is: 
V =  when h is the height and a&b are the length of the two square edges. So we have:
 when h is the height and a&b are the length of the two square edges. So we have: 
- V =  *4*4*7.4 = 59.2 *4*4*7.4 = 59.2  
To find the concrete used in the ramp if the cost of concrete is $ 4.00 per cubic foot, we need to know the area of the ramp, which is: 
S = 4*4 = 16  
 
Hence, the value of the concrete used is: 16*4 = $64
 
        
                    
             
        
        
        
Step-by-step explanation:
please mark me as brainlest
 
        
                    
             
        
        
        
Answer:
12x⁴y⁴
Step-by-step explanation:
3xy + 3xy + 3xy + 3xy = 12x⁴y⁴