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.
<span>inferior planets: Mercury and Venus. closer to the Sun than Earth. The inferior planets show phases like the Moon's when viewed from Earth.Earth.<span>superior planets: Mars thru Neptune. farther from the Sun than Earth. The superior planets always appear full or nearly so. (this answer is on google )</span></span>
The right answer is CFA francs
<u>Answer:</u>
<em>Because there is not enough evidence to prove just one theory</em>
<em></em>
<u>Explanation:</u>
It is tough to explain the whole development of the earth together with some different theories. We don't know how long the whole universe will last or we don't know is there a probability for the universe to get extinct.
Everything related to universe is still mysterious and every theories which has been proved till today can be modified at any time because we know that the universe is expanding and we cannot state a stable theory for its origin. However, that depends on the future which we cannot define and it also modify the possible fate of the world.
Warm, humid, growing, part of United States with important oil discoveries - <u>South</u>.
Northern part of this peninsula is heavily populated, near San Diego - <u>Baja California</u><u>.</u>
Vast forests and active volcanoes in the United States - <u>Pacific Northwest</u>.
Includes area around the American and Canadian shores of the Great Lakes - <u>Midwest</u>.
<h3>What is a sub-region?</h3>
This refers to the conceptual unit which derives from a larger region or continent and is usually based on location.
For instance, in the United States, the subregion of the country includes the Pacific Northwest, Midwest, Baja California, South etc.
Therefore, in this question, the sub-region were used to locate the region where we have:
- Warm, humid, growing, part of United States with important oil discoveries
- Northern part of this peninsula is heavily populated, near San Diego
- Vast forests and active volcanoes, in the United States
- Includes area around the, American and Canadian shores of the Great Lakes.
Read more about subregion
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