Find the Center and Radius of the Sphere $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } - 14 z = 0$

question 219

Multiple Choice

Find the center and radius of the sphere. $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } - 14 z = 0$

• A)center: (0,0,0);radius: 49
• B)center: (0,0,7);radius: 49
• C)center: (0,0,-7);radius: 7
• D)center: (0,0,7);radius: 7
• E)center: (0,0,0);radius: 0

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Definitions:

Psychoanalysis

A therapeutic approach and theory of psychology developed by Sigmund Freud that emphasizes unconscious motivations and conflicts.

Freud's Theory

A set of psychoanalytic theories developed by Sigmund Freud, which emphasize the influence of the unconscious mind, sexual and aggressive drives, and childhood experiences on behavior.

Psychosexual Stages

A core concept of Freudian theory that suggests human development occurs in a series of predetermined stages, each centered around the gratification of libido on different parts of the body.

Genital Stage

A phase in Freud's theory of psychosexual development where the focus of pleasure is on genital stimulation and the establishment of mature sexual relationships.