Answer:
Sinx = 5/13
cosy = 5/13 
cosy = sinx ; they both share a proportional relationship 
Step-by-step explanation:
From the attached triangle, since the triangle is right angled, we can use trigonometric functions where ;
sinx° = opposite / hypotenuse
From Pythagoras ;
Hypotenuse = √(opposite² + adjacent²)
Hypotenus = √(12² + 5²)
Hypotenus = 13
Sin x° = opposite / hypotenus = 5 / 13
Sin x° = 5/13
Cos y = adjacent / hypotenus = 5 / 13
Hence, 
sinx = cosy
Therefore, they both share a proportional relationship. 
 
        
             
        
        
        
Answer:
12.36
Step-by-step explanation:
the standard deviation is 12.36123 or 12.36 rounded.
 
        
             
        
        
        
Multiply these together: (7/26)*(6/15)*(5/14)*(4/13)
1.92% is the probability all friends order cotton sweatshirts but you can round that up to 2% C'=
        
                    
             
        
        
        
<h2>
Answer: A.) The first one.</h2>
Step-by-step explanation: