The one which has the greatest initial DOWNWARD velocity which is ball 4
        
             
        
        
        
Answer: See explanation
Step-by-step explanation:
You didn't give the options relating to the question. 
To solve this first, you need to know that we have to note that (+) × (-) = (-). Therefore, 1.25+(-0.75) will be thesame as writing 1.25 - 0.75. This will then be:
= 1.25 - 0.75
= 0.50
 
        
                    
             
        
        
        
Okay. So for this equation, she would make $60, plus $5.25 in tips each hour. So for this, she would get $60 + 5.25h. Plug in 4 hours, and she would make $21 off of tips, plus the $60, which brings her up to $81 total. The answer is C.
        
             
        
        
        
5.476 rounded to the hundredths place = 5.48