Answer:
   9 hours
Step-by-step explanation:
"At the same rate" means time and wages are proportional.
   time/wages = t/$108 = (13 h)/$156
   t = 108(13 h)/156 . . . . . . . . . . . . . . . units of dollars cancel
   t = 9 h
Chang would have to work 9 hours to make $108.
 
        
             
        
        
        
Answer:
48
Step-by-step explanation:
base times hight times times 1/2 
24X4X1/2
 
        
                    
             
        
        
        
Answer : The substances half life in days is, 5.6 days.
Step-by-step explanation :
Half life : It is defined as the amount of time taken by a radioactive material to decay to half of its original value.
All radioactive decays follow first order kinetics.
The relation between the half-life and rate constant is:

where,
k = rate constant = 0.1235 per days
 = half-life
 = half-life
Now put all the given values in the above formula, we get:


Thus, the substances half life in days is, 5.6 days.
 
        
             
        
        
        
Area yellow =11 x 6
 = 66
red area = 7 x 2
 =14
area of yellow
66 - 14 = 52
 
        
             
        
        
        
Answer:
11 days
Step-by-step explanation:
380-160=220
20 times 11 =220
answer 11 days