Answer:
Step-by-step explanation:
I think you are just asking for the decimal answers.
3/20 = 0.15
9/50 = 0.18
38/200 = 0.19
 
        
             
        
        
        
Ok so we know he used over 700 because he was charged more than 40. Then we take the $8.10 and divide 0.45 into it. This then gives you 18 more minutes. Then add 18 to 700 and you get 718 min.
        
             
        
        
        
Answer:

Step-by-step explanation:
The change of form formula (exponential to logarithm) is:

Looking at the problem given, we can simply write the logarithmic form as:

This is the answer.
 
        
             
        
        
        
The council tax bill before the increase is £1240
The equation that represents the percentage increase in council tax bill is : 
percentage increase x t = £62
Where t represents the initial council tax bill - council tax bill before the 5% increase
5% x t = £62 
0.05 x t = £62 
Divide both sides of the equation by 0.05 
t = £62 / 0.05 = £1240
To check if the answer derived is correct : 5% x 1240 = 62. 
A similar question was answered here: brainly.com/question/12066598?referrer=searchResults