Answer: Jamie
Step-by-step explanation:
Bcuz I took the test and made sure it was Jamie
Answer:
The bones were 12,485 years old at the time they were discovered.
Step-by-step explanation:
Amount of the element:
The amount of the element after t years is given by the following equation, considering the decay rate proportional to the amount present:

In which A(0) is the initial amount and k is the decay rate, as a decimal.
The radioactive element carbon-14 has a half-life of 5750 years.
This means that
, and we use this to find k. So







So

A scientist determined that the bones from a mastodon had lost 77.8 % of their carbon-14. How old were the bones at the time they were discovered?
Had 100 - 77.8 = 22.2% remaining, so this is t for which:

Then






The bones were 12,485 years old at the time they were discovered.
19 you could’ve just used the calculator lol
Answer:
3/8 is less than 11/12
Step-by-step explanation:
3/8 is 0.375 as a decimal
11/12 is 0.92 as a decimal
so 3/8 is less than 11/12
It always helps to turn them into decimals...
Answer:
the answer is b
Step-by-step explanation:
i took the test it is b. The sum of the areas of faces A, B, and C.