Solve
-The Pressure of a Gas Varies Jointly as the Amount

Solve.
-The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is $1530 \mathrm { kPa }$ (kiloPascals) when the number of moles is 6 , the temperature is $340 ^ { \circ } \mathrm { Kelvin }$ , and the volume is $720 \mathrm { cc }$ , find the pressure when the number of moles is 7 , the temperature is $310 ^ { \circ } \mathrm { K }$ , and the volume is $420 \mathrm { cc }$ .

A) $1350 \mathrm { kPa }$
B) $1395 \mathrm { kPa }$
C) $2880 \mathrm { kPa }$
D) $2790 \mathrm { kPa }$