a.) initial sample left : 794g
b.) Time taken to decay : 3.39
Isotopes(200g) are atoms that have the same number of protons in their nucleus, but a different number of neutrons. This means that they have the same atomic number, but a different atomic mass. Because of this, isotopes have different physical and chemical properties. Isotopes can be stable, meaning that they do not undergo radioactive decay, or they can be unstable, meaning that they will undergo radioactive decay over time.
a.)
Substituting 25 for t in the expression, we get:
A(25)=
Thus, after 25 years, there will be =2003.97=>794 g of the initial sample left in the sample.
794
b.)
We want to find t such that A(t)=
=100.
Solving for t, we get:
=*t
=100
Dividing both sides by 200 and applying the natural logarithm to both sides, we get:
0.0541*t=ln(0.5)
Therefore, t= 
=3.39 years.
To Learn More about Isotopes Decay follow link : brainly.com/question/16355768
#SPJ1
The sides and how they equal up
Answer:
the answer is (-4,1) in point form and or x= -4, y=1 in equation form.
Answer:
Option b (4,1)
Step-by-step explanation:
The region given by the system of inequalities is shown in the graph. We must look within this region for the point that minimizes the objective function 
The minimum points are found in the lower vertices of the region.
These vertices are found by equating the equations of the lines::
-------------------
---------------------
The lower vertices are:
(4, 1) (2, 4)
Now we substitute both points in the objective function to see which of them we get the lowest value of 
Then the value that minimizes f(x, y) is (4,1).
Option b
Hello!!
To calculate the percentage increase<span>: First: work out the </span>difference<span> (</span>increase<span>) between the two numbers you are comparing. Then: divide the </span>increase<span> by the original number and multiply the answer by 100. If your answer is a negative number then this is a </span>percentage<span> decrease.
</span>let me know if u have anymore questions!:)
