Answer:
what? i cant understand you pls translate in English
The atomic number tells you the number of protons in an atom. This value never changes because the number of protons in the nucleus always remains constant. The mass number tells you the number of protons and neutrons (or nucleons) together: protons + neutrons = mass number. Since the number of neutrons in the nucleus varies, you can have different amounts of neutrons in the same type of atom. These varied types are called isotopes.
Hope this helps.
To minimize the material usage we have to have the volume requested with the minimum surface area.
The volume is:

And the surface is:

From the first equation we get:

I will use k instead of a number just for the conveince.
We plug this into the second equation and we get:

To find the minimum of this function we have to find the zeros of its first derivative.
Sx will denote the first derivative with respect to x and Sy will denote the first derivative with respect to Sy.

Now let both derivatives go to zero and solve the system (this will give us the so-called critical points).

Now we plug in the first equation into the other and we get:

Now we can calculate y:

And finaly we calculate z:

And finaly let's check our result:
Answer:
that will be tureHéroes y bandidos: iconos populares y figuraciones de la nación ... más o menos convencional de un Superman o, mejor, un Batman: un ... —o, a veces, mediante su imposibilidad— se obliga al lector a ... creerse que un hombre de aspecto tan común fuera el poderoso ... vas a sentir la furia de un león.
Gasses take the shape of their container.
A gas fills a container which takes both the shape and the volume of that container.