Answer:I think your Answer would be x=14 but I am not sure.
Step-by-step explanation:
2log 10 (x+86)=4
Determine the defined 
2log 10 (x+86)=4,x >-86
Divide both sides by 2 
log 10 (x+86)=2
Solve by converting the logarithm into exponential form 
x+86=10 2 
Evaluate the power 
x+86=100
Move constant to the right 
x=100-86
Subtract the numbers 
x=14,x>-86
Check if the solution is in the defined range 
SOLUTION
X=14
 
        
             
        
        
        
Answer:
by using Pythagoras law
h²=p²+b²
13²=9²+b²
169-81=b²
b=√88=2√22m is your answer