Answer:
An area or perimiter formula
Step-by-step explanation:
 
        
             
        
        
        
It appears that the Pythagorean theorem can be applied to this problem
  (distance to shadow)² = (height of building)² + (length of shadow)²
  (38 m)² = (height of building)² + (28 m)²
  660 m² = (height of building)²
Then the height of the building is
  height of building = √660 m ≈ 25.7 m
        
             
        
        
        
5.100 x 10⁻³ = 5.100 x 0.001
                    = 0.005100      (shift the decimal point for 5 by 3 units left)
Alternatively, because 10⁻³ = 1/1000, therefore
5.100 x 10⁻³ = 5.1/1000
           0.0051
         ---------------
1000 | 5.100
           5000
           -------------
              1000
              1000
            
This yields the same result.
Answer: b. 0.005100
        
             
        
        
        
Answer:
Option (B) is correct.
To prove
As given the epression in the question is given by

Now simplify the above
Terms are written as


Put in the above expression.



