Solve the Problem $f ( x ) = 300 ( 0.5 ) ^ { x / 90 }$

question 220

Multiple Choice

Solve the problem.
-The function f $f ( x ) = 300 ( 0.5 ) ^ { x / 90 }$ models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of
Radioactive material in the vault after 200 years. Round to the nearest whole number.

• A) 333 pounds
• B) 220 pounds
• C) 68 pounds
• D) 64 pounds

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Definitions:

Ego

In psychoanalytic theory, a part of the personality that mediates between external reality, the id, and superego, and is responsible for realistic and socially appropriate behavior.

Amoral

Lacking moral sense; unconcerned with the rightness or wrongness of something.

Ego And Id

Fundamental components in Freudian psychoanalytic theory where the id is the primal desires and drives, and the ego is the realistic part that mediates between the desires of the id and the morals of the superego.

Completely

Totally or entirely; having all parts or elements.