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?

what is the answer?

a. 273.488 in

b. 8.493 ft

c. 1.899 ft

d. 273.488 ft