When a scientist dives in salt water to a depth of 9 feet below the surface, the pressure due to the atmosphere and surrounding water is 18.7
pounds per square inch. As the scientist descends, the pressure increases
linearly. At a depth of 14 feet, the pressure is 20.9 pounds per square
inch. If the pressure increases-at a constant rate as the scientist's depth
below the surface increases, which of the following linear models best
describes the pressure p in pounds per square inch at a depth of d feet
below the surface?
A) p= 0.44 +0.77
B) P=0.44d + 14.74
C) P= 2.2d - 1.1,
D) p = 2.2d - 9.9

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

the maxium height is 34m/s