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

Which of the following best describes the changes brought to world populations as a result of the European colonization of the Americas? A. The Africa

List the angles of the triangle in order from smallest to largest measure. A. B. C. D.

Danielle earns a 8.25% commission on everything she sells at the electronics store where she works. She also earns a base salary of $650 per week. How much did

Describe good peer pressure and bad peer pressure

An investor bought an antique table for $6000. He paid 5% as a deposit and borrowed the remainder from a bank for two years at 18% p.a. simple interest, payable

how did the minoans develop wealth

Solve for x: 3|2x − 2| + 6 = 18 x = 3, x = −3 x = 3, x = −1 x = 1, x = −1 x = −3, x = 1

The status of ordinary citizens before the revolution?

who was aunty em in greek mythology?

sam is a waiter at a local restaurant where he earns wages of $7 per hour. Sam figures that he also earns about $5 in tips for each person he serves. Sam works