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 Zagros are a mountain range in Iran. Basically on the windward side of the range it'll be really wet and on the lee ward side it'll be dry probably even a desert. The warm moist air is forced up the mountain where the cooler temperatures at the top cause condensation so it rains. Dry on the other side. The main range in Turkey are called the Taurus mountains.
The official national animal of Australia is the Kangaroo.
The Kangaroo which is hunted for meat and for sport, and used as a motif in the decorative arts, the kangaroo was finally recognized as an official symbol of Australia when it was included on the nations coat of arms in 1908.
The answer is: Kangaroo
Because the hanging wall moves up relative to the foot wall, most of these faults place older rocks over younger rocks.<span />
Answer:
A cutaway drawing of the Earth demonstrates how latitude is determined
Explanation:
It makes clear that latitude is a measure of the angle between the plane of the equator and lines projected from the center of the Earth.
