So, here we have an exponential function.
Remember that an exponential function has the form:

Where a represents an initial amount, and r is the rate of this amount to change. (Increase, or decrease).
So, given that the population of City A in 2000 was 40 thousand people and the population increased by 13% each year, we can say that 

So, 

For city B:

But something different happens with city C. This is not an exponential function, this is a linear function.
So,

 
 
        
             
        
        
        
Answer:
i think B
Step-by-step explanation:
because if we think logically...the price have to more than 10-28.All answer except B are illogical for me i think
hope its help 
 
        
                    
             
        
        
        
Answer:
to find compound interest 
it is 
p(1+r) ^n
p stands for principa
r is the rate (percentage)
n is the amount of years
820(1+3.5 ) ^ 5
 100
chsnge the percentsge to a decimal and add it to 1.
820(1 + 0.035) ^ 5
820(1.035)^5
raise what is in the bracket to the power of 5 which is the amount of years
820× 1.19
=£975.80
im not good with simple interest,could someone else show her how to do it please
 
        
             
        
        
        
Complete question is;
Assume the random variable X is normally distributed with mean μ = 50 and standard deviation σ = 7. What is the probability P (X > 42)?
Answer:
P(X > 42) = 0.1271
Step-by-step explanation:
We are given;
mean; μ = 50 
Standard deviation; σ = 7
Formula for the z-score is;
z = (x - μ)/σ
Thus;
z = (42 - 50)/7
z = -1.14
Since we are looking for P (X > 42), then let's look up this z-value from the z-distribution table attached.
We have;
P(X > 42) = 0.1271
 
        
             
        
        
        
Answer:

<h3>
Step-by-step explanation:</h3>

<u>Cross multiply:</u>
(Multiply the numerator in the first fraction times the denominator in the second fraction, then multiply the numerator of the second fraction times the number in the denominator of your first fraction.)

<u>Switch sides:</u>

<u>Divide both sides by 19:</u>

<u>Divide 798 by 19 = 42</u>


<h3>
<u>______________________________</u></h3>