Answer:

Step-by-step explanation:
Let n represent number of new members and f(n) represent membership money.
We have been given that there are currently 20 members in the school's Ski Club. So when n new members join, the total number of members would be  .
.
Since for each new member recruited the dues for all members will be reduced by 10 cents, so new dues would be  .
.
The membership money would be number of total members times dues as:

Since we need our equation in standard form, so we will use FOIL to expand our equation as:




Therefore, our required equation would be  .
.
 
        
             
        
        
        
Answer: C
Step-by-step explanation:
You can solve this by first multiplying both sides of the fraction by the conjugate of the denominator.
In this case, the conjugate is (8 - 2i). 
So:

Simplify:

Simplify again, knowing that i^2 = -1

Then, divide both numbers in the numerator by 68 to get your answer. 

 
        
             
        
        
        
10,000$(1+0.055*8)
This is the formula of simple interest
10,000+10,000(0.055*t)
10,000$(1+0.055*8)=14,400