Answer: v njhgfcvbhgfcvbhgfcvbnhgv
Explanation: v njhgfcvbhgfcvbhgfcvbnhgv
A lecture hall is a large room used for instruction in college or university. The capacity of lecture halls are typically measured in the hundreds
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
Answer: Don't know sorry
Explanation: Have a nice day :)
Answer:
D.)
Explanation:
The other ones, dont make any sense, a streotype is defined as a widely held but fixed and oversimplified image or idea of a particular type of person or thing.
