Help me I’m struggling with this one

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.