Answer:
2 times 3 = x
Step-by-step explanation:
thats how i would do it
Answer: 16 bags
Step-by-step explanation:
there are 80 cookies in total
80/5=16
Have a good day :)
U can use he dictionary...that's what I do... :P
Answer:
693 Years
Step-by-step explanation:
Given an initial amount
and k (a negative constant) determined by the nature of the material, the amount of radioactive material remaining at a given time t, is determined using he formula:
![A(t)= A_oe^{kt}](https://tex.z-dn.net/?f=A%28t%29%3D%20A_oe%5E%7Bkt%7D)
If a certain radioactive isotope decays at a rate of 0.1% annually.
![\frac{1}{2} A_o= A_oe^{-0.001t}\\e^{-0.001t}=\frac{1}{2}\\$Take the natural logarithm of both sides\\-0.001t=ln(0.5)\\t=ln(0.5) \div -0.001\\t=693.15\approx 693 \:years](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20A_o%3D%20A_oe%5E%7B-0.001t%7D%5C%5Ce%5E%7B-0.001t%7D%3D%5Cfrac%7B1%7D%7B2%7D%5C%5C%24Take%20the%20natural%20logarithm%20of%20both%20sides%5C%5C-0.001t%3Dln%280.5%29%5C%5Ct%3Dln%280.5%29%20%5Cdiv%20-0.001%5C%5Ct%3D693.15%5Capprox%20693%20%5C%3Ayears)
The half-life of the isotope is 693 years.