4 tables. 4*4 is 16, meaning that even if 4 players want to sit together it doesn't make a difference. With 16 players and 4 at a table we are going to need 4 tables.
The correct answer should be :
Option 3 : 
Hope this helps,
Davinia.
R is the rate (10%)
C=20, begiing rate
T=time=8
so
h=20(1+0.10)^8
h=20(1.1)^8
h=42.8718
ronnd
$42.87
D is answer
You make 22.50
assuming you get two payments of 11.25 a month
<span>0.38709677419 is your answer</span>