This is the concept of arithmetic. To calculate the percentage of time life has existed we proceed as follows;
According to history:
The age of earth is 4.6 billion years
the age of life is as it appeared from unicellular is 3.8 billion years.
thus the percentage of the above will be:
3.8/4.6 x 100
=0.82609x100
=82.609%
This would be 45.9
Get a calculator or try long division :-)
Answer:
what?
Step-by-step explanation:
Answer:
The height of the cone is
Step-by-step explanation:
we know that
The volume of a cone is equal to
In this problem we have
----> the radius is half the diameter
assume
substitute the values and solve for h
In order to solve for r you have to place all the number in one side. then isolate r ...... r=1