Answer:
age of the site is 15411.75 years old
Explanation:
Given data
plant or animal dies = 14C
time period = 5730 year
carbon = 15.5%
to find out
age (in years) of the ancient site
solution
we know that Final value = Initial value × ![0.5^{n}](https://tex.z-dn.net/?f=0.5%5E%7Bn%7D)
here n is half life passed
so for 15.5%
15.5% = 100% of ![0.5^{n}](https://tex.z-dn.net/?f=0.5%5E%7Bn%7D)
0.155 = 1 × ![0.5^{n}](https://tex.z-dn.net/?f=0.5%5E%7Bn%7D)
now take log both side
log 0.155 = log ![0.5^{n}](https://tex.z-dn.net/?f=0.5%5E%7Bn%7D)
n = log 0.155 / log 0.5
n = 2.68966
we know here 5730 years in half life
so for 2.68966 half-lives = 2.68966 × 5730 = 15411.7518
age of the site is 15411.75 years old
Answer:
5km/h
Explanation:
The equation for average speed is
Vavg = Δd/Δt
where Δd is distance and Δt is time
from what's given, we know she travelled 15km in total and the trip took 3 hours in total. We can now plug in the values into the equation
Vavg = 15/3
Vavg = 5km/h
It is mechanical your welcome
You can start with a recycling project , it can solve any problems including saving animals, giving clean water, and cleaner environment ofcourse