Perimeter = side 1 + side 2 ´+ side 3.
Triangle 1 
Perimeter = 6 + 8 + 10
 = 24 
Triangle 2
Perimeter = 9 + 12 + 15 
 = 36
Ratio
 24/36 = 2/3
The ratio of the perimeters is also 2/3
 
        
             
        
        
        
Answer:
The correct answer is the number in the note is 80 and the first digit is 8.
Step-by-step explanation:
Dr. Green finds a note from another scientist. It says how many boxes of bug nets they should bring, but there is a smudge over the first digit of the number.
Number of nets that they must bring is 320.
Each box contains 4 nets.
There number of boxes necessary to be brought is given by  = 80.
 = 80.
Therefore the missing digit of number the number in the note is 8.
 
        
                    
             
        
        
        
The solution for this question is simple. First we need to divide both numbers by 2 which will give us 10 and 7. This is the equation x^2/10^2 + y^2/7^2 = 1sqrt(100-49) = 7.14 (the answer do not have a perfect square root)
Foci are 14.28 units apart