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About 92 days are taken for 90 % of the material to <em>decay</em>.
The mass of radioisotopes (), measured in milligrams, decreases exponentially in time (
), measured in days. The model that represents such decrease is described below:
(1)
Where:
- Initial mass, in milligrams.
- Current mass, in milligrams.
- Time constant, in days.
In addition, the time constant is defined in terms of half-life (), in days:
(2)
If we know that ,
and
, then the time required for decaying is:
About 92 days are taken for 90 % of the material to <em>decay</em>.
We kindly invite to check this question on half-life: brainly.com/question/24710827
Answer:
Tyrone's rate is 1 more mile per hour than John's
Step-by-step explanation:
Given
--- John number of jog
See attachment of Tyrone's number of jog
Required
Select the true option
From the attached graph, we have:
Calculate the slope (m); i.e. unit rate
For John, we have:
A linear equation is represented as:
Where m represents the unit rate. So, by comparison;
--- John unit rate
--- Tyrone unit rate
<em>Option B is correct because Tyrone's rate is 1 more mile per hour than John's</em>
<em>i.e. 6 - 5 = 1</em>