Question

Situation: Find the substance's half-life, in days. Round your answer to the nearest tenth. A 10 gram sample of a substance that's used to detect explosives has a k-value of 0.1356. Enter the correct answer. N = Noekt DONE No = initial mass (at time t = 0) OOO OO ? 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​

Answer 1

half life = 5.1 days

Explanation:

half N = 5

5 = 10*e^(-kt)

0.5 = e^(-kt)

ln(0.5) = -kt

t = ln(0.5)/(-k)

t = ln(0.5)/(-0.1356) = 5.11170...