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anonymous
 one year ago
A 39 gram sample of a substance that's a byproduct of fireworks has a kvalue of 0.1024.
N = N0e kt
N0 = initial mass (at time t = 0)
N = mass at time t
k = a positive constant that depends on the substance itself and on the units used to measure time
t = time, in days
Find the substance's halflife, in days.
Round your answer to the nearest tenth.
anonymous
 one year ago
A 39 gram sample of a substance that's a byproduct of fireworks has a kvalue of 0.1024. N = N0e kt N0 = initial mass (at time t = 0) N = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days Find the substance's halflife, in days. Round your answer to the nearest tenth.

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puppylover52
 one year ago
Best ResponseYou've already chosen the best response.0srry idk this one

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1the equation is \[\frac{N(t)}{N_o} = e^{kt}\] set N /No to 1/2 and that is what half life means, the time for the amount to halve \[\frac{1}{2} = e^{0.1024T}\] take logs and solve for T, where t = T is the half life

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1nice work @IrishBoy123 !

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer cause I cant solve it?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i solved for t and its still not it

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1i think u use t to solve the 1/2 life... yeah?

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1no, in irish's example: t is the half life

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you find the answer @Jack1 ?

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1yeah, i have the answer, what did u get for t?

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1yep, same here, exact answer for half life is t=6.76902 ish

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1all i have is grams tho, i don't know the units of k, so i have no idea of the units of t or if k and t are both in the same units of measure...?

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1(eg if k's relates to pounds/second or something and our No is in grams we have a problem)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so you think you can solve it?

Jack1
 one year ago
Best ResponseYou've already chosen the best response.1lol... wat? so 6.8 isnt ur answer? (rounded to the nearest tenth)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lol it is now my computer got messed up so it was saying everything incorrect thanks @Jack1
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