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
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Hello,
x,y,z∈ IN
==>
x∈{35,36,37}
y∈{47,48,49}
z∈{141,144,147}
We must go futher:
if x=35 then y=4*35/3=46.666 not good , not whole
if x=36 then y=4*36/3=48 ok
if x=37 then y=37*4/3=49.333.. not good
So there is only one solution (36,48,144) for (x,y,z)
No problem with z for z=3/1*4/3*x=4x ==>whole.
Answer:
58 child tickets were sold
Step-by-step explanation:
If 58 child tickets were sold, then that would mean that 77 adult tickets were sold because they need to add up to 135 total tickets sold.
We can multiply 58 by $6 to get the total sales for just the child tickets which will give us $348.
Next, we can multiply 77 by $9.60 to get the total sales for the adult tickets which will give us $730.20
Then when we have both of our sales for the children tickets and the adult tickets, we can add them together to get a total amount of sales of $1087.20
(sorry if this is confusing but I hope this helped!)
Answer:
the answer is 8 square units
Step-by-step explanation:
i hope i helped
R = 34x - (4x + 180)
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