The spear is 4620 years old.
N=N0e^-kt
N0 = initial amount of C-14 (at time t = 0)
N = amount of C-14 at time t
t = time, in years
k = 0.0001
N/N0 = e^-kt
we know N/N0 is 0.63
so we have:
0.63 = e^-kt
we can take the ln of both sides, leaving us with:
ln0.63 = -kt
t = ln0.63 / -(0.0001)
t = 4620 years
hope this helps with your thing!
-keynerd23
First and most obvious one was is constant use of tobacco. Smoking can damage blood vessels and that can lead to blockages within the vessels. The single most important risk factorthough is his high blood pressure. The fact that he was skipping his meds was also not helpinghis chances. He also presented with high cholesterol which greatly increases the chances of blockages within the vessels.44.
These abnormalities occur in the serotonin system which reduces and/or inhibits control in their movement. This disruption of the neurotransmitter causes them to act maladaptively. Thank you for your question. Please don't hesitate to ask in Brainly your queries.
Answer:
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
Explanation:
Answer:
OK fossils are evidence of a animal or plant life that has been preserved within the earths crust...... but over time the animal and plants remains washes away leaving a mold in some cases minerals fills up with mold and leaves a small cast or replica,of the animal or plant (: