Answer:
1
Step-by-step explanation:
4-3=1 denominator never changes may i be marked brainliest?
Answer:
-17.00 dollars.
Step-by-step explanation:
Answer:
The age of this sample is 13,417 years.
Step-by-step explanation:
The amount of carbon 14 present in a sample after t years is given by the following equation:
![C(t) = C_{0}e^{-0.00012t}](https://tex.z-dn.net/?f=C%28t%29%20%3D%20C_%7B0%7De%5E%7B-0.00012t%7D)
Estimate the age of a sample of wood discoverd by a arecheologist if the carbon level in the sampleis only 20% of it orginal carbon 14 level.
The problem asks us to find the value of t when
![C(t) = 0.2C_{0}](https://tex.z-dn.net/?f=C%28t%29%20%3D%200.2C_%7B0%7D)
So:
![C(t) = C_{0}e^{-0.00012t}](https://tex.z-dn.net/?f=C%28t%29%20%3D%20C_%7B0%7De%5E%7B-0.00012t%7D)
![0.2C_{0} = C_{0}e^{-0.00012t}](https://tex.z-dn.net/?f=0.2C_%7B0%7D%20%3D%20C_%7B0%7De%5E%7B-0.00012t%7D)
![e^{-0.00012t} = \frac{0.2C_{0}}{C_{0}}](https://tex.z-dn.net/?f=e%5E%7B-0.00012t%7D%20%3D%20%5Cfrac%7B0.2C_%7B0%7D%7D%7BC_%7B0%7D%7D)
![e^{-0.00012t} = 0.2](https://tex.z-dn.net/?f=e%5E%7B-0.00012t%7D%20%3D%200.2)
![ln e^{-0.00012t} = ln 0.2](https://tex.z-dn.net/?f=ln%20e%5E%7B-0.00012t%7D%20%3D%20ln%200.2)
![-0.00012t = -1.61](https://tex.z-dn.net/?f=-0.00012t%20%3D%20-1.61)
![0.00012t = 1.61](https://tex.z-dn.net/?f=0.00012t%20%3D%201.61)
![t = \frac{1.61}{0.00012}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B1.61%7D%7B0.00012%7D)
![t = 13,416.7](https://tex.z-dn.net/?f=t%20%3D%2013%2C416.7)
The age of this sample is 13,417 years.
Answer:
A or 15
Step-by-step explanation:
Answer:
31.25%
Step-by-step explanation:
12-8.25=$ 3.75
(3.75/12)*100=31.25%