teller
  • teller
Can someone tell me if this is correct? The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 215 grams of a radioactive isotope, how much will be left after 4 half-lives?Use the calculator provided and round your answer to the nearest gram. f=215(1+0.005)^4=219.33235763 so would it be 219.32?
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
teller
  • teller
@phi can you see if I got this right?
phi
  • phi
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass that means if you start with 100, after one half-life, you will have 50 your answer should be smaller than the amount you start with.
teller
  • teller
Got a little confused there but would it be 210

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

phi
  • phi
where did you get your formula? I would use 215*(0.5)^n where n is the number of half-lifes
teller
  • teller
i got it from the explain tab it says to use those formulas so would it be 13.4375
phi
  • phi
yes, that looks better you could do it like this 215 --> 107.5 (1 half life) 107.5/2 = 53.75 (2nd) 53.75/2 = 26.875 (3rd) 26.875/2= 13.4375 (4 half lifes) the formula is faster to use.
teller
  • teller
but it said to the nearest gram so would it be 13.42?
phi
  • phi
the starting amount is in grams so the answer 13.4375 is in grams round to the nearest gram means the nearest whole number you have 13.4 (plus a tiny bit more) is 13.4 closer to 13 or to 14 ?
teller
  • teller
13
teller
  • teller
so the answer would be 13?
phi
  • phi
yes 13 the rule in rounding is look at the next lower digit 13.4 <-- look at the 4 if 5 or bigger round up (to 14) else round down to 13
teller
  • teller
Thank you mind helping me with another one ?Once I get it solved since this is my last question.

Looking for something else?

Not the answer you are looking for? Search for more explanations.