<u><em>Randomly disturbed is your answer.</em></u>
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
The answer would be B. Radio waves have long wavelengths and Gamma Rays have shorter wavelengths. Radio waves have larger wavelengths than Gamma rays. I hope this helps:)
Answer:
It is affecting most population depending on whether it is a disease or something else. For example an outbreak of berberi happened in the 1300s in which chickens were staggering around and this was a very common symptom of berberi. The coopmaster found out they were being fed rice without its bran. The chickens were given rice still with its bran. The chickens got better. Turns out the same thing worked for people.
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