At a florist's shop, two assistants made 13 flower arrangements in a certain amount of time. assuming all assistants will work for the same amount of time and each assistant is trained to work at the same rate, how many assistants are needed to make: 39 arrangements, 91 arrangements, and 195 arrangements.

We will say: two assistance made 13 arrangements in T (timeTaken). So if it took 2 assistants to make 13, then 1 assistant could make 6.5 arrangements in the same T (timeTaken).

So if we get 6.5 flower arrangements for every T, we can calculate that it would take:

6 assistants to make 39 arrangements in T,

14 assistants to make 91 arrangements in T,

and 30 assistants to make 195 arrangements in T