Answer: your anserw is c
Explanation:
here is your answer please let me know if you got it right and plz rate me the most brainlest
I think I c the answer mate ;)
Answer:
0.36443148.....
Explanation:
To evaluate the given question, we begin by solving for the figures in the bracket. After this is done, the figure obtained is then raised to the power of three or multiplied three times.
(5/7)
= 0.714285.....
The figure obtained is then raised to the power of three, thus;
(0.714285)^3
=0.36443148...
The value obtained here is a continuous or repeating figure so it continues to infinity.
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
