Question

A 39 gram sample of a substance that's a by-product of fireworks has a k-value 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 half-life, in days.

Round your answer to the nearest tenth.

Answer 1

@Pizza7

Answer 2

@iambatman

Answer 3

ok we get the picture now? go straight to the answer. it is
−ln(.5)÷0.1374
use a caclulator
natural log of one half divided by the natural log of k, get rid of the minus sign
to the tenth it is 50.4 but you should check in case i give you the wrong answer

Answer 4

I dont Know

Answer 5

google gave me 5.04473930539

Answer 6

the formula for half-life is \(t_{1/2}=\dfrac{ln(2)}{k}\)

Answer 7

ok