A certain radioactive substance has a half-life of 75 hours. Find how long it will take, to the nearest hour, for 75% of the radioactivity to be dissipated if the amount of material x satisfies 
(t in hours) . Round your answer to the nearest hour.
Definitions:
Polygraph Test
An examination that measures physiological responses to questions, used to infer truthfulness.
True Statements
Declarations or assertions that are accurate and in agreement with fact or reality.
Neuropsychological Test
A standardized assessment tool used to measure a specific aspect of cognitive function, helping diagnose conditions affecting the brain.
Brain Abnormalities
Structural or functional deviations in the brain from the normal, which can be associated with various neurological or mental health conditions.
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