Answer:
4 trees
Step-by-step explanation:
40/10=4
 
        
             
        
        
        
Step-by-step explanation:
Brother Answer is 12 inches
 
        
             
        
        
        
Answer:
30 mph
Step-by-step explanation:
The average speed = Total distance / Total Time
Distance at 45 m/hr.
t = 20 minutes = 20/60 = 1/3 hour.
r = rate = 45 miles / hour
d = r * t
d = 45 * 1/3 = 15 miles.
Average Speed going home.
t =  30 minutes 
t = 30 min / 60 min // hour = 1/2 hours
r = 15 miles / 1/2 = 15 * 2 =  30 miles / hr.