Answer:

Explanation:
Let
x ----> the surface area of a sphere
y ---> the volume of a sphere
we know that
The ratio of surface area to volume of a sphere is equal to divide the surface area by the volume of the sphere

we have

substitute the values

Answer:
Cell is called the Fundamental Unit of Life Because all basic metabolism activity starts from the cell. Inside the cell, energy is produced , food is stored and many more activities take place
it is structural and functional unit of living beings
it includes all the activities of cells
it is there in each and every life process
An example of an dramatic environmental event can be deforestation, or it can be animals losing their homes.
Answer:
Aluminum
Explanation:
The density of Aluminum is 2.7 g/cm3
We know the volume and mass of the unknown metal, as density is mass/volume: 81g/30cm3 = 2.7 g/cm3 which is the density of Aluminum :)