Set up a proportion.
2/3 = 12/x. Cross multiply the proportion.
2x = 36. Solve for x.
x = 18.
        
             
        
        
        
Answer:
21
Step-by-step explanation:
 
        
                    
             
        
        
        
2 to the 12th power should be correct
        
             
        
        
        
Answer:
The answer to your question is 55 ft
Step-by-step explanation:
Data
Person's height = 5 ft
Person's shadow = 10 ft
Tree's height = ?
Tree's shadow = 110 ft
- Use the Thales' theorem to solve this problem
  Person's height / Person's shadow = Tree's height / Tree's shadow
- Substitution
                      5 / 10 = x / 110
-Solve for x
                      x = 5 (110) / 10
-Simplification
                      x = 550 / 10
 -Result
                      x = 55 ft
-Conclusion
The tree is 55 ft height