A gas with initial conditions p_i, V_i, and T_i expands isothermally until V_f=6 V_i. What are (a) T_f and (b) p_f?

1)T_f/T_i=

2)p_f/p_i=

I don't know how to solve this

2 answers

A answered this a few days ago.

http://www.jiskha.com/display.cgi?id=1313210061
I saw that but I don't understand what the actual answer should be.