Answer:
676
Step-by-step explanation:
d1×d2/2
42×56/2
1352/2=676
please check it by doing again
 
        
                    
             
        
        
        
Answer:
 y  = 4/5x  - 9/5
Step-by-step explanation:
4x - 5y = 9  to solve for y you get it by itself.
-4x          -4x   minus 4x from both sides
-5y  = - 4x + 9
/-5            /-5   Divide both sides by 5
  y  = 4/5x  - 9/5   because -4/-5 is 4/5 and 9/-5 is - 9/5
 
        
             
        
        
        
Option B:

Solution:
Given sound level = 120 decibel
To find the intensity of a fire alarm:

where 
Step 1: First divide the decibel level by 10.
120 ÷ 10 = 12
Step 2: Use that value in the exponent of the ratio with base 10.

Step 3: Use that power of twelve to find the intensity in Watts per square meter.


Now, do the cross multiplication,




Option B is the correct answer.
Hence  .
.
 
        
             
        
        
        
Answer:
yuh
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The difference is 1,563 feet.
Step-by-step explanation:
1,281+282=1,563