The density of mercury changes approximately linearly with temperature as ρ= XXXXXXXXXX086T in lbm/ft^3 (T in degrees F), so the same pressure difference will result in a manometer reading that is...

The density of mercury changes approximately linearly with temperature as ρ=851.5-0.086T in lbm/ft^3 (T in degrees F), so the same pressure difference will result in a manometer reading that is influenced by temperature. If a pressure difference of 14.7 lbf/in^2 is measured in the summer at 95F and in the winter at 5F, what is the difference in column height between the two measurements?