Question

Please help me have been trying to solve this problem for a while and its been very frustrating.



Krypton-91 is a radioactive substance that decays very quickly. The function Q(t)=Qoe^-kt models the radioactive decay of krypton-91. Q represents the quantity remaining after t seconds, and the decay constant, k, is approximately 0.07. How long will it take a quantity of krypton-91 to decay to 10% of its original amount? Round your answer to the nearest second.

Answer 1

new account?

Answer 2

yeah

Answer 3

thnks

Answer 4

to tell the truth it should show you what to do here.

http://openstudy.com/study#/updates/5564be9ae4b0a3c430174bba

Answer 5

because I have no clue how to solve this

Answer 6

ok thanks for trying is anyone else going to help me er...?

Answer 7

probley not

Answer 8

most of them are offline

Answer 9

ok thnk u

Answer 10

well most 99s are ofline

Answer 11

;)