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
I think it's B 34 so it's not c or a :3
I’m pretty sure it’s 50 dollars
Is it dangerous if someone else knows my social security number?
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Probably not.
While many current Quora users may be too young to remember this, many job applications used to ask the person applying for their date of birth and Social Security Number. And almost all applicants put them on a form which was likely filed away or simply thrown away in the trash some time later.
There's also the fact that medical professionals, insurers, various government agencies, all financial institution which you do business with, many ex-friends and lovers, family members, most educational institutions and grantors of credit all had or have access to your SSN.
