Answer:10.188mm

Explanation:ρ = 1.295 kg/m³

decrease in the pressure of air = ρ g h = 1.295 * g * 107  Pa

ρ g h = 13.6 * 10³ * g * H

H = decrease in barometric height of mercury

   = ρ g h / (13.6*10³ * g) = 10.188 mm