Answer these three question from what you see
1 answer:
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Answer:
Step-by-step explanation:
We want the equation of a line that is parallel to which also passes through (-7, 1).
Since the new line is parallel, it must have the same slope as the original line.
The slope of the original line is 6.
Hence, the slope of our new line must also be 6.
We know that the slope is 6.
And it passes through the point (-7, 1).
So, we can use the point-slope form:
Where m is the slope and (x₁, y₁) is a point.
Substitute:
Simplify:
Distribute:
Add 1 to both sides. Hence, our equation is:
Answer:
Where represent the half life and the intial amount would be
And we want to find the time in order to have a 95% of decay so we can set up the following equation:
If we apply natural log on both sides we got:
And solving for t we got:
So then would takes about 14.26 hours in order to have 95% of the lead to decay
Step-by-step explanation:
For this case we can define the variable of interest amount of Pb209 and for the half life would be given:
Where represent the half life and the intial amount would be
And we want to find the time in order to have a 95% of decay so we can set up the following equation:
If we apply natural log on both sides we got:
And solving for t we got:
So then would takes about 14.26 hours in order to have 95% of the lead to decay