Seudónimo Seudónimo
  • 03-07-2017
  • Mathematics
contestada

a 9 gram sample of a substance that's used for drug research has a k-value of 0.1459

Respuesta :

Аноним Аноним
  • 09-07-2017
N = N0 e^(-kt)

for half life N/N0 = 1/2 and k = 0.1459

1/2 = e^(-0.1459t)

=> -0.1459 t = ln(0.5)

t = - ln(0.5) /0.1459

= 4.8 days
Answer Link

Otras preguntas

Thelma spent 1/6 of her weekly allowance on dog toys.  1/4 on a dog collar and 1/3 on dog food.  What fraction of her weekly allowance is left
What all the multiples of 81?
What all the multiples of 81?
Does an owl have a backbone?
What were the contributions of the Harappan civilization?
josh wanted to buy a bicycle but didn't have enough money. After josh told his troubles to sam slick, sam said,"I can fix that. see that fence? each time you ju
a lunch bill including tax, is divided among you and 5 friends. everyone pays less than $8.75. write and solve an inequality that describes the total amount of
Thelma spent 1/6 of her weekly allowance on dog toys.  1/4 on a dog collar and 1/3 on dog food.  What fraction of her weekly allowance is left
Factor the expression. If the expression cannot be factored, say so.
Does an owl have a backbone?