At sea level, the weight of the atmosphere exerts a pressure of 14.7 pounds per square inch, commonly referred to as 1 atmosphere of pressure. As an object descends in water, pressure Pand depth d are linearly related. In salt the pressure at a depth of 33 ft is 2 atms, or 29.4 pounds per square inch. (A) Find a linear model that relates pressure P (in pounds per square inch) to depth d (in feet). (B) Interpret the slope of the model. (C) Find the pressure at a depth of 50 ft. (D) Find the depth at which the pressure is 5 atms. (A) Choose the correct linear model below. O A. P=0.03d + 1 VB. P=0.445d + 14.7 O C. P= 2.245d - 33 O D. P=0.445d + 29.4 (B) Choose the correct interpretation of the slope of the model below. It is the rate of change of pressure with respect to depth in units of Ib/in per foot. It is the rate of change of depth with respect pressure in units of feet per Ib/in".

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