Answer:
D. Crop plants have shallow root systems, and most of the mineral nutrients are on the surface.
Explanation:
According to the question, we are required to provide the best explanation for the given sentence which says that crop plants make use of more mineral nutrients than native plants.
Based on this sentence, the best explanation would be that crop plants have shallow root systems, and most of the mineral nutrients are on the surface.
Answer: The geometric patterns.
Explanation: To me, this is the only relationship that divides solely for the purpose of maintaining territory.
The answer to this question is II
Focus means to concentrate without distraction.
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
