1. 75% increase 
2. 30% decrease 
3. 80% increase 
4. 25% decrease
        
             
        
        
        
Answer:
The answer to your question is: 
1st Diego
2nd Diego and Elena ( both 15 days)
Step-by-step explanation:
Data
Lin          54 pages               270-page book                   3 days
Diego   100 pages               320 page                             4 days
Elena   160 pages                480 page                             5 days
Process
Lin 
                           54 pages      -------------------   3 days
                         270 page        -----------------      x
                           x = (270 x 3) / 54
                           x = 15 days
Diego
                         100 pages        -----------------   4 days
                         320                  --------------------   x
                         x = (320 x 4) / 100
                         x = 12.8 days
Elena     
                         160 pages -------------------   5 days
                        480 pages --------------------   x
                        x = (480 x 5) / 160
                        x = 15 days
 
        
             
        
        
        
D because you know it can’t be a or b and the bigger number goes first
        
             
        
        
        
Step-by-step explanation:
distance between (12.-7) and (-3, -7)

=12+3
=15 units
 
        
             
        
        
        
Answer:
divide
Step-by-step explanation:
 divide the first one by the second that might help