A Radioactive Substance Decays in Such a Way That the Amount

question 7

Short Answer

A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function $m ( t ) = 13 e ^ { - 0.015 t }$ where $m ( t )$ is measured in kilograms. Round your answers to three decimal places.
a) Find the mass at time $t = 0$ .
b) How much of the mass remains after 100 days?

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Definitions:

Acquiescent Response Set

Tendency to agree with items in an attitude questionnaire. This leads to an ambiguity in interpretation if a high score on an attitude questionnaire can be obtained only by agreeing with all or most items.

Mere Exposure Effect

A mental effect where people start liking things simply because they know them well.

External Validity

The extent to which the results of a study can be generalized to other situations and to other people.

Multiple Act Criterion

A standard in social and behavioral research that emphasizes judging behaviors or actions based on a series of observations, rather than a single instance.