It’s 225,000,000= 225 million
        
                    
             
        
        
        
Answer:
30.3
Step-by-step explanation:
24 + (12.56637/2)
24 + 6.283185
30.283185
30.3 rounded to the nearest tenth
 
        
             
        
        
        
Answer:
Friction is a force that opposes motion between any surfaces that are touching. Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. ... Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy
 
        
                    
             
        
        
        
6b-18c+18x is simplified for you