If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
Answer:
A. Providing for the needs of its aging population
Explanation:
The population pyramid shows that the group of people with the highest population as at year 2000, are people of the ages between 40 - 44, and 35 - 39. These group of people are arguably the active and working class people of China.
By 2029, that's about 29 years to come, most of these groups of people who be aged already and retired from active service.
Therefore, China would be faced with the demographic challenge of providing for the needs of its aging population, beginning from 2029.
Non-target organisms (NTO) are species not targeted for control using a particular Cry protein expressed in transgenic plants, but may become exposed to it by feeding directly on plant tissues or indirectly on herbivores or parasites, or by direct ingestion via the environment, such as in the soil or water
Answer:
a student measures the length of a building three times
Explanation:
what is the question
Selling price of wheat by miller= $90
Selling price of flour by miller= $145
Selling price of bread by baker = $155
In this economy the GDP is $155 because it is the final price he got for the wheat.
So the miller initially had $90 and sold the flour for $145, so he gets an additional 145 - 90 that is $55 gain
Now the baker have $145 and makes the bread and sell it for $155, so he 155 - 145 that is $10 extra.
Adding up all these profit amount 90 + 55 + 10 again making it 155 which is GDP.
