You are solving for the height. Use the formula:
c² - b² = a²      in which c = hypotenuse
(13)² - (5)² = a²
Simplify
169 - 25 = a²
144 = a²
Isolate the a. Root both sides
√144 = √a²
a = √144
a = √(12 x 12)
a = 12
C) 12 feet is your answer
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Answer:
15 because 3 x  5 equals 15
Step-by-step explanation:
 
        
                    
             
        
        
        
8 times 3 equals 23 and that is one of the answers
        
             
        
        
        
Answer: 5/3
(1/3)(5/1)=5/3