Question

A collector of rare items is negotiating with a museum. He wants to sell a spear he claims to have been

used to kill a mammoth over 11,000 years ago. A spear that size would have started with around 4g of
Carbon-14, and the museum tests show it now contains around 2g. How many half-lives have passed since the spear was carved?

Answer 1

1 as 2g is half of 4g

Explanation: that means that the spear is closer to 6k years old

Answer 2

I'm not sure if you maybe forgot to add in some information but I can give you the equation you will need to solve this..! (just without the bit of infomration you might need)

`2=4((1)/(2))^{(1100)/(t)}`

In this case you'll be solving for t and I can help you with your first step, you'll divide 2 by 4, getting you to:

`(1)/(2) =(1)/(2)^{(1100)/(t)`