The map explaines how the routers are setup around the district.
 
We took another look at Subnetting and tried the Ping and Tracert commands.
 

To figure how many subnets we need use the formula 2 (power of n) -2
n is the number of 1s in the subnet mask  n=5  gives you 30 subnets and the mask will look like
11111000

To figure how many hosts you will have with that subnet mask you 2 (power of h) -2
h is the number of 000 in the subnet mask.