Yes, a linear relationship (mathematical) is a constant change happening to x, for example, if in the first step it adds 2 to the table chart or graph, it will always be adding 2 every step of the equason
        
                    
             
        
        
        
All sides are equal in an equilateral triangle and the perpendicular bisects the side too.
so BC will be bisected and the segments be 5 each.
you can use Pythagoras theorem to find the altitude length, hypotenuse will be one side of the triangle.

$h^2=100-25=75$
$h=\sqrt{75}=5\sqrt3$
 
        
             
        
        
        
Answer:
V candle ≈ 196.9 cm³
Step-by-step explanation:
Volume of cone = ( π·r²·h)/3
V candle = V big cone -V small cone
V candle = [ π·4²·(8+5) - π·2²·5]/3 
V candle = ( π·16·13 - π·4·5)/3 
V candle = (π·16·13 - π·4·5)/3 
V candle = π·(208 - 20)/3 
V candle = π·188/3 
V candle = 196.8731396
V candle ≈ 196.9 cm³
 
        
             
        
        
        
The length is 2.4 
1.2 times 2 to take away the both width sides 
minutes 2.4 from 7.2 you get 4.8 then divide by two because it’s a rectangle it has to length side and you get 2.4