Seudónimo Seudónimo
  • 01-01-2021
  • Mathematics
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Hello guys, plz help me with this question ASAP! Plz show the working, THANK YOU BROTHER

Hello guys plz help me with this question ASAP Plz show the working THANK YOU BROTHER class=

Respuesta :

yesyesufcurs yesyesufcurs
  • 01-01-2021

Answer:

5.5 min

Step-by-step explanation:

At time t=0 you have 72 grams

at time t = 22 min you have 4.5 grams.

Now

4.5/72 = (1/2)^(t/half-life)

and t=22, so

4.5/72 = (1/2)^(22/half-life)

taking log of both sides:

log(4.5/72)=(22/half-life)log(1/2)

solving for half-life gives half-life = 11/2 = 5.5min

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