Plutonium-239 Is a Primary Component of Modern Nuclear Weapons

question 17

Multiple Choice

Plutonium-239 is a primary component of modern nuclear weapons.If there is initially 6 kilograms, then after t thousand years, the amount remaining is given by . Over what time range will there be between 1 and 2 kilograms of plutonium-239 remaining? Round your answer to two decimal places.

• A) From 38.36 to 62.56 thousand years
• B) From 20.27 to 24.77 thousand years
• C) Up to 62.56 thousand years
• D) Up to 20.27 thousand years

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Definitions:

Systematic Desensitization

A behavioral therapy method for reducing fear and anxiety responses by gradually exposing the patient to the feared object or context in a controlled way.

Behavior Modification

The use of learned techniques to improve or change specific behaviors.

Rational-Emotive Behavioral Therapy

A form of psychotherapy that helps individuals identify self-defeating thoughts and feelings, challenge the rationality of those feelings, and replace them with healthier, more productive beliefs.

Medial Prefrontal Cortex

A region of the brain involved in decision making, personality expression, and moderating social behavior.