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.
Answer:
The countries once were joined in one piece called Pangaea. Animals lived ON the pate boundaries of Pangaea. The plates then moved apart.
Explanation:
Which statement is not true about the two figures below?
Answer:
C.Both figures have two pairs of parallel sides.
<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em><</em><em>3</em><em> </em>
Command economy is the answer
C.) Panama canal was built in 1903 by Theodore Roosevelt
Hope this helps!
