If you want an online presentation, I think you mean by a website.
Best thing you can find is Google Slides.
if you want a program, 
LibreOffice is your best bet. It is completely free and it is for Linux, Windows and possibly Mac.
        
                    
             
        
        
        
Answer:
5,400 because it turns at the right speed, but if it is too fast or too slow, it will not perform at it's fullest potential. Such as speed and storage.
 
        
             
        
        
        
It is actually podcast! i took the quiz as well :)
 
        
                    
             
        
        
        
Answer:
two million years ago 
Thomas Edison, American inventor who, singly or jointly, held a world-record 1,093 patents. In addition, he created the world's first industrial research laboratory.