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anonymous
 4 years ago
9. A particular radioactive substance has a halflife of 3 years. Suppose an initial sample has a mass of 200 mg.
a) Write an equation that relates the mass of the radioactive material remaining to time.
b) How much will remain after one decade, to the nearest hundredth?
please do part b)
anonymous
 4 years ago
9. A particular radioactive substance has a halflife of 3 years. Suppose an initial sample has a mass of 200 mg. a) Write an equation that relates the mass of the radioactive material remaining to time. b) How much will remain after one decade, to the nearest hundredth? please do part b)

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Af = 200 (1/2) ^ 10/3 i cant solve from here

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0punch it in the calculator. i got 0.07; to the nearest hundredth

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the answer is 19.84 mg

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i got the answer too but i forgot how i did it

razor99
 4 years ago
Best ResponseYou've already chosen the best response.0srry i know only grade 8 maths

EarthCitizen
 4 years ago
Best ResponseYou've already chosen the best response.0h is the Planck's constant ryt ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0h is the half life period

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0half life means, it reduces to half in that period. So, from 200mg it goes to 100 mg in 3 years. In 6 years, it goes to 50 mg. In 9 years, it goes to 25 mg. In 10 years, it goes to.....that is the part of the equation I am not clear on (too long ago and too late/tired to recall).

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Try 25mg to the power of 2/3. Is that 19.84mg? I don't have scientific calculator.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0exactly but i gotta get the number 19.84. I got all the values just need to know how to put it in and no it doesnt work

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0punch in the calculator the first equation u've given

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@Jerwyn: how did you do it `:O

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0find the cube root of .5 to tenth power, then multiply to 200

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0200 times (1/2) to the power of 10/3. It gives you 19.84.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0First find 0.5 to the power of 3.333333. Then multiply by 200.
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