Answer:
If the duration of life on Earth was on a scale of 20,000 days, the human species would be present in the Earth for approximately 9 days.
Explanation:
We can't be sure about the exactly age of the Earth, but we can base our calculus in a number between 4400 and 4600 million years, because the most accepted researches shows numbers in this span of time. We can take the average of those limits: 4500 million years.
On another hand the presence in the Earth of human species has not a precise date because of the it does not have a precise date for two main reasons, the scientific evidence does not include all the human species that existed on Earth but it is a very incomplete evidence and besides being an evolutionary phenomenon it is not easy to determine from what moment We can consider that a species belongs to the human race or not. In any case, we take the approximate date of the scientific evidence of the existence of human species in an age of 2 million years.
With both numbers we can calculate the proportion in the scale of 20 thousand years throw the following formula:
PHS = 20000 years . 2 million years / 4500 million years = 8.9 years
PHS: Presence of Human Species
Nucleus, that is the answer
There are many disadvantages depending on the type of renewable resource. For example, wind energy is renewable but the turbines take up too much space, and cause birds to die which causes environmental problems. Another example is that solar energy takes up a lot of space, is expensive and only works with certain weather.
I hope this helps!
Abbey
Answer:
Explanation: see attachment
Answer:
A cheerful teen willing to help,
stay salty...
Explanation:
Angles in a heptagon equals 900°
i.e (n-2)×180 where n is substituted for the number of sides.
Find the sum of the remaining angles and subtract it from 900°
120+125+138+82+95+3x+x=900°
560°+4x=900°
4x=900°-560°
4x=340°
Divide both sides by 4
x=85°
while 3x= 255°
