The correct answer is D. gross national product. (I took the test)
Answer:
Which 2 are commonwealths
Explanation:
Hawaii is a state and the Virgin Islands and Guam have no major government ruling them, meaning that Puerto Rico and the Marina Islands are commonwealths
<span>the answer is physical boundary</span>
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.
