Situation: a farmer in china discovers a mammals hide that contians 30 percent of its original c-14

Question: find the age of mammal hide in the nearest year.

k=0.0001

That answer is wrong the real answer is 12040 trust me i just had the question and i got it wrong so in stead of cheating i had to work it out and i did

in (0.30) / - 0.0001=12039.72but it says round so the correct answer is 12040!