NEED HELP! AP Chemistry. Pressure?

Question

A glass column is filled with mercury and is inverted in a pool of mercury. The mercury column stabilizes at a height of 735 mm above the pool of mercury. What is the pressure of the atmosphere?

-1.03 atm
-0194 atm
-0.967 atm
-0.697 atm
-0.735 atm

Answer 1

1 ATM is defined as 760mmHg, so 735mmHg would be:

735/760 = 0.967ATM

Note: all your numbers are negative; do you mean the pressure inside the tube or outside?

The answer given above is for outside the tube.