I believe that the MOST reasonable answer would be A.) never use daffodils with other flowers in arrangements. If they are harmful to other plants it would be best to just keep them seperate, and the rest of the other options just seem unreasonable and too much work just for something so simple :P
Answer:
Explanation:
The Second World War (WWII) was one of the major transformative events of the 20th century, with 39 million deaths in Europe alone.
Periods of hunger became more common even in relatively prosperous Western Europe.
Putting aside the very real human cost, war has also serious economic costs – loss of buildings, infrastructure, a decline in the working population, uncertainty, rise in debt and disruption to normal economic activity.
If wars alter long-term economic growth, they would permanently depress economic prospects of future generations so they had to surrender.
Mortality rate has reduced, lack of father to children and the war has cause severe hungers
The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years
<h3>What is the half life of an element?</h3>
The formula for half life is;
A(t) = A₀ * (¹/₂)^(t/t_1/2)
Where;
A(t) is amount left after t years
A₀ the initial quantity of the substance that will undergo decay;
t_1/2 is the half-life of the decaying quantity.
We are given;
t_1/2 = 28.8 years
A₀ = 1 g
A(t) = 250 mg = 0.25 g
Thus;
0.25 = 1 * (¹/₂)^(t/28.8)
log 0.25 = (t/28.8) log (1/2)
-0.60206 = (t/28.8) * -0.3010
t = 2 * 28.8
t = 57.6 years
Read more about half life at; brainly.com/question/11152793
Answer:
thank you for your advice
