Question 446106
let height of cliff be x
distance from cliff to boat = 2x-3
distance from boat to cliff on ground = 92
Use Pythagoras theorem
(2x-3)^2=x^2+92^2
4x^2-12x+9=x^2+8464
3x^2-12x-8455=0

a=	3,	b=	-12,	c=	-8455		
							
b^2-4ac=144+101460		
b^2-4ac=101604
sqrt(101604)=318.75
{{{x=(-b+-sqrt(b^2-4ac))/(2a)}}}							
{{{x1=(-b+sqrt(b^2-4ac))/(2a)}}}					
x1=(12+318.75)/6		
x1=	55.13						
x2=(12-318.75)/6			
x2=-51.13						
Ignore negative value	
Height = 55.13 ft						
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