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.
The country of Brazil & Bolivia are the pair which share a border.
The border in this context refers countries which shares a close or immediate boundary. For instance, the nation of U.S. and Canada shares a border.
Here, the pairs including "Belgium & Bulgaria", "Belize & Barbados" and "Belarus & Bangladesh" does not share a boundary.
Hence, the country of Brazil & Bolivia are the pair which share a border.
Therefore, the Option B is correct.
Missing options includes <em>"a. belgium & bulgaria b. brazil & bolivia c. belize & barbados d. belarus & bangladesh."</em>
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Read more about Border
<em>brainly.com/question/1336648</em>
Atmosphere, the global sum of all ecosystems, and the kithosphere
Answer:
I think it can be A (10%)
there was many problems for food in 2016 buy now I think it is 10%
Well longitude and latitude is what I think you are talking about. Longitude goes up/down and latitude goes across.
