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.
This layer of soil is called the A horizon.
Answer:
There are total of thirty islands like British Virgin Islands, Anguilla, Saint Martin/Sint Maarten, Saint-Barthélemy, Saba, Sint Eustatius, Saint Kitts, Nevis, Barbuda, Antigua, Redonda, Montserrat, Guadeloupe, La Désirade, Marie-Galante.
Explanation:
- Leeward means in the opposite direction of winds, such as westerlies and trade winds these terms used by sailing ships.
- Leeward islands are a group of Islands, located in the northeastern Caribbean sea located east of Puerto Rico, they are also referred to the northern islands of lesser Antilles chain.
- These islands are affected by volcanic activity, and notable eruptions have occurred in the history of these islands. Leeward island became a British territory in 1671,
- Most of the leeward islands are a part of the U.S territory and comprise a population of 700,000. The largest settlement in Les Abymes. Islands host diverse life forms both on land and seas.
Answer:
all Four...
Explanation:
all four are true...
they occur simultaneously
Answer:
the pattern of the ages of rocks of the seafloor support the theory of plate tectonics because it tells us if the tectonic plates at the seafloor are spreading apart in a divergent boundary
