Models Salinity of Ocean Water to Depths of 1000 Meters $37.3 \mathrm {~m}$

Multiple Choice

models salinity of ocean water to depths of 1000 meters at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the depth (to the
Nearest tenth of a meter) where the salinity equals 35.

A) $37.3 \mathrm {~m}$
B) $- 1.0 \mathrm {~m}$
C) $- 0.9 \mathrm {~m}$
D) $39.3 \mathrm {~m}$