a.

Write a recursive formula to represent .

Let .

The pressure increases for each foot below sea level .

represents the human body at foot below sea level.

The pressure exerted on the human body at foot below the sea level is .

represents the human body at foot below sea level.

The pressure exerted on the human body at feet below the sea level is .

Recursive formula to represent the pressure at  feet below the sea level is .

b.

represents the human body at foot below sea level.

The pressure exerted on the human body at foot below the sea level is .

represents the human body at foot below sea level.

The pressure exerted on the human body at feet below the sea level is .

c.

Each term of the sequence is found by adding to the succeeding term.

This sequence can be represented by a linear function that has slope .

The equation with the slope is .

The pressure exerted on the human initially is where .

Substitute and in .

Find pressure at feet below the sea level.

Substitute and in .

Therefore, the water pressure at feet below the sea level is .

a. The pressure exerted on the human body at feet below the sea level is .

b. The pressure exerted on the human body at feet below the sea level is .

c. The water pressure at feet below the sea level is .