1 hr 18 minutes and 27 seconds hmmm
there are 60 minutes in 1 hr, thus 18 minutes is 18/60 hrs or 0.3hr.
so 1hr 18min is 1.3 hrs
there are 60 seconds in 1 minute and 60 minutes in 1 hr, thus 60*60 seconds in 1hr, or 3600 seconds, so, 27 seconds is just 27/3600 hrs, or 0.0075 hrs.
so, 1.3 hr or 1.3000 hr for that matter plus 0.0075, is just 
1.3075 hrs.
a)
so, they covered 26.2 miles in 1.3075 hrs, so the average speed is just 26.2/1.3075, or about 20.0382409177 miles/hr
b)
 
 
        
        
        
Answer:
1. 13.65, 136.5, 1365    
2. 57.14, 5.714, .5714
Step-by-step explanation:
 
        
                    
             
        
        
        
Rate of Change represents the number of apartments cleaned each hour & this is linear.
        
             
        
        
        
Answer:
c would be the answer hope this help 
Step-by-step explanation:
pleas make brainly if it's right 
 
        
             
        
        
        
Answer:
8 hours
Step-by-step explanation:
70-10
60÷7.50= 8 hours