Actually none of the answers is correct - it's neither 30,900 nor 40,000.
30,944 rounded to the nearest ten thousand will give us 30,000. It's because 30,944 is closer to 30,000 than to 40,000.
        
             
        
        
        
Jill ran faster.  I know because I compared both of their unit rates.
Jack's unit rate is  5/42.5 = 0.118 mile per minute (rounded) 
Jill's unit rate is  3/23.25 = 0.129 mile per minute (rounded)
Jill runs a greater part of a mile per minute than Jack does.
She is faster.  There's no getting around it.
        
                    
             
        
        
        
Answer:
Juan has 35 orders
Step-by-step explanation:
you subtract 40 from 75 to get 35