Half Life - Find Time to Decay to a Certain Percentage

[@tinalin9909]

Thank you so much. You've help me complete my last problem, which I was stuck on for a while.

[@theundaddy8037]

Awesome explanation, I did not expect the formula to be so complex

[@210TexasBoxing]

rlly needed this for yesterdays test thank you!

[@tinayeshegoronga2136]

Extremely good and wonderfully explained Appreciated

[@claudioricciardiello9601]

Nice explanation! Thank you very much for your help.

[@ashtonpoopalasingham9699]

this was extremely helpful thank you so much!

[@toygamingshow5000]

(ignore my name, its an account i made when i was young) thank you sooo much, i was stressing so hard, this came in clutch.

[@MathandStatsHelp]

You're welcome

[@Jamorantspiece]

I love you

[@wintermataa3159]

Thank you so much, you make it sound so easy😂😂🙌

[@MathandStatsHelp]

I try to make it easy.

[@carapencak9502]

THANK YOU SO MUCH

[@PhillipFilian109]

A commercial anti-inflammatory drug has an initial content of 1088mg/L.It has a half-life of one and a half hour.In how many hours from now will it take to reduce its content to 34 mg/L.

[@karhukivi]

7.5 hours.

[@pavweenasanmugam383]

OMG THANK YOU SOO MUCH❤

[@bobveinne2439]

Amazing, thanks!

[@seun_the_great0]

Bless you!

[@haziqshukur1127]

thankss!!! now i ve completed my tutorial. cute voice hiks

[@waynerozan224]

Freaking Keenan & Wood Chapter 14, Problem 36 could NOT be solved because the Authors Never provided an example for the MATH involved. Thanks for this brain twister. ln(.5)/t=K, then ln(%)/K=t.

[@jedediahwright6959]

Thank You!

[@robertoiiivillasor8395]

May I ask your assistance for this problem? Iodine-131 is a radioactive isotope used in medicine. Its half-life or decay rate of 50% is 8 days. If a patient is given 25mg of iodine-131, how much would be left after 32 days or 4 half-lives. Identify C, T, R and the decay factor. Write down the equation you would use and solve.

[@waynerozan224]

Solve 1.0g Ra226 (h-l 1620 yrs.) decays in 10 days. What are the amounts of Ra and He?

[@danielodisa5088]

Thanks alot

[@ellis5393]

Hii what if the A0 is given? Do we still cancel it out?

[@MathandStatsHelp]

It would still cancel out, because it's the same value on both sides.

[@Arjun----]

yes it would. the value doesn't change

[@Auraetrow]

Thanks 🥺

[@MathandStatsHelp]

You're welcome

[@Affan_qaiser]

Will we not change days into seconds?

[@MathandStatsHelp]

Since the half life is measured in days, you don't have to. If they asked you how many seconds would it take, then you would have to convert.

[@minasalah2668]

How did you cancel out the A0 again?

[@MathandStatsHelp]

Sorry didn't see this comment. They cancel out, because you're dividing both sides by A0. Anything divided by itself is 1.

[@minasalah2668]

Math and Stats Help Thank you so much, I got an A- is my calculus class.

[@MathandStatsHelp]

That's awesome!