Question

A 46 gram sample of a substance that's a
by-product of fireworks has a k-value of
0.1368.

Answer 1

Whats the question?

Answer 2

A 46 gram sample of a substance that's a
by-product of fireworks has a k-value of
0.1368.

Answer 3

Is that the question is it a is this true or false and why is it false or true question?

Answer 4

A 46 gram sample of a substance that's a
by-product of fireworks has a k-value of
0.1368.Find the substance's half-life, in days.Round your answer to the nearest tenth.

Answer 5

Is there more information included?

Answer 6

A 46 gram sample of a substance
by-product of fireworks has a k-value of
0.1368.
N = Noekt
No = initial mass (at time t = 0)
N = mass at timet
k= a positive constant that depends on
the substance itself and on the units
used to measure time
t = time, in days

Answer 7

Ok, first ya wanna do N(t) = (Nø)  •  e^[- k • t ]

Answer 8

Then 23 = (½)  •  (46) half life tho

Answer 9

How you put it in the calculator

Answer 10

no im solving it for u

Answer 11

Ok thanks

Answer 12

well just doing the equation part

Answer 13

Ok

Answer 14

23 = (46)  •  e^[- (0.137) • t ] divide by 46

Answer 15

Ok thanks you

Answer 16

Then u would wanna do 0.5 = e^[- (0.137) • t ] take the natural log of both sides

Answer 17

  ln[0.5] = - (0.137) • t 

Answer 18

Oh

Answer 19

t = 5.06 days round this to the nearest ten

Answer 20

have u rounded it yet?