There are 500 thousands in half a million.
To find the age of the sample, we need to determine how many half-lives have passed based on the daughter isotope percentage. Since the daughter isotope is 87.5% present, it means 12.5% has decayed from the parent isotope. Since 1 half-life would result in 50% decay, we can divide 12.5% by 50% to get 0.25 half-lives. Therefore, the sample is approximately 150 million years (half-life) x 0.25 = 37.5 million years old.
Although rainforests cover only about a tenth of the Earth's surface, they are home to at least half of the world's species of animals and plants - that's thousands of insects alone. About 1.5 million people also live in the rainforests.
a rainforest has hundreds even thousands of species of plants.
There have been around eight ice ages in the last million years, with each ice age lasting for tens of thousands of years. These ice ages were characterized by the expansion of glaciers and ice sheets over large portions of the Earth's surface, resulting in cooler temperatures and lower sea levels.
For a rock to have started with 1500 atoms of any element and now have 750 it has undergone radioactive decay equal to one full half life (i.e. there are half the number of atoms now than at the beginning).Uranium-235 has a half life of 7.038×108 years.As such, the rock is 7.038×108 or 703 million years old.
a million is 1000 thousands so half a million is 500 thousands.
500,000 = half a million
500,000 dollars, if a million is 1,000,000 then half is 500,000
500 thousand equal half a million - not milliom.
500
There are 50,000; thousands in 50 million.
There are 1,000 thousands in one million.
There are 19,300 thousands in 19.3 million
There are one thousand thousands in one million.
There are ten (10) 100 thousands in a million.
There are 100 ten thousands in a million.
There are 10 hundred-thousands in a million.