I’m not 100% but I think the answer is C I hope I helped you and good luck
Answer: Differences.
Explanation: People tend to look at the differences of each person or social structure amongst different groups. For instance, Anti-Social and Social. The differences is that Socials are known to be stereotyped to be very good at talking, a social butterfly who always likes conversation. With Anti Social people, they are considered shy and scared to speak, which most of the time can be true and false. They are judgements people have on groups depending on how they look, talk, life style, dressage, and many more. At this point, these are all assumptions. We can simply even stereotype someone out of our feelings like jealousy or anger. Hope this answered the question!
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
