Answer:
Last Option
Step-by-step explanation:
We have a triangle and we know its three sides.
We want to find one of your anguos. Then we use the cosine theorem.

Where

Now we solve for x from the equation

 
        
                    
             
        
        
        
Answer:
1cm = 320 km?
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
45
Step-by-step explanation:
c^2*b 
We know that c is 3, and b is 5, so we can substitute them in 
3^2*5 
Solve the exponent first 
9*5
Multiply 
45 
 
        
                    
             
        
        
        
What table? i think you need to upload a picture of it or something