Answer: dont listen to the weirdo charging for money LOLL got a 96% on the Cumulative Exam II (part b of AP World): c d b b b a b d b c a c b d d a a d b a d b d d c a b b b a b d a d b c b b b d a d b b c d b c b c
Explanation:
got the first one wrong, i put d. its c
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
Idk sorry ask someone else trololololo
Answer:
It's answer is False
this is correct answer
l hope it's helpful for you.....
