Help plsss I need to answer this

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

True or false graphs must include scales that increase by the same amount

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?