Answer:
were introduced into American geography in the 1920s by Carl Sauer
Set this up as
10 = 40 (1/2)t/28
and solve for t in years.
10/40 = (1/2)t/28
log(0.25) = (t/28) log(0.5)
t = 28 log(0.25) / log(0.5) years = 56 years
Test the answer:
56 years = 2(28 years) = 2 half-lives, so the remaining amount should be 1/2 of 1/2 of the initial amount, i.e. 1/4 of the initial amount, and 10 mg = 1/4 of 40 mg.
Explanation:
It is because we are, this is the first time in human history, where we have technology and science is widely accepted, without being ridiculed by religious figures. We are truly out of the dark ages and the basic humanity of a few hundred years ago and we are now in the age of light, where people can be cured of many ailments and you don't even have to get up from your lazy buttocks to get food, you can just shout at a machine to do it.
Almost each and every activities of human beings are being done with the support of science and technology.We take support pf science and technology in educational field banks industrial sector as well as in home .Without science and technology ,nobody can imagine for luxurious life in this world.Due to these reasons,modern world is called age of science and technology.
hope it helps :)
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