I don't quite understand the last answer, do you happen to have an image you can show me?
        
             
        
        
        
Volume of a cylinder = πr^2 h = π x (2)^2 x 3 = π x 4 x 3 = 12π = 37.7 cm^3
        
             
        
        
        
The solution to x + 8.5 = 64.5 is 56.
    x + 8.5 = 64.5
       - 8.5   - 8.5
---------------------------
    x = 56
        
                    
             
        
        
        
5x and 7y. Keep up the good work
        
             
        
        
        
Answer:
40°
Step-by-step explanation:
The reference angle is the positive acute angle created by the terminal arm and the x-axis.
The highlighted red in the picture below shows what we're looking for.
The arm rotated 220° (but 'backwards' so the value given is negative). 
|-220°| - 2(90°)          <= Subtract two right angles for two quadrants
= 220° - 2(90°)
= 220° - 180°
= 40°
Therefore, the reference angle is 40°.
If you got 50°, you probably calculated the angle with the terminal arm and the y-axis. Remember to always use the nearest side of the x-axis!