B. Your answer is B. Jdkdodofocococc
2.5m 15 feet 12/5=2.5 and 75/5=15
Answer:
![t=4820 y](https://tex.z-dn.net/?f=t%3D4820%20y)
Step-by-step explanation:
a) The half-life equation is given by:
![t_{1/2}=\frac{ln(2)}{k}](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%3D%5Cfrac%7Bln%282%29%7D%7Bk%7D)
b) Using the decay equation we have:
![Q(t)=15e^{-0.0001438t}](https://tex.z-dn.net/?f=Q%28t%29%3D15e%5E%7B-0.0001438t%7D)
we need to find t when ![Q(t)=\frac{Q_{0}}{2}](https://tex.z-dn.net/?f=Q%28t%29%3D%5Cfrac%7BQ_%7B0%7D%7D%7B2%7D)
![7.5=15e^{-0.0001438t}](https://tex.z-dn.net/?f=7.5%3D15e%5E%7B-0.0001438t%7D)
![0.5=e^{-0.0001438t}](https://tex.z-dn.net/?f=0.5%3De%5E%7B-0.0001438t%7D)
![ln(0.5)=-0.0001438t](https://tex.z-dn.net/?f=ln%280.5%29%3D-0.0001438t)
![t=\frac{ln(0.5)}{-0.0001438}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7Bln%280.5%29%7D%7B-0.0001438%7D)
![t=4820 y](https://tex.z-dn.net/?f=t%3D4820%20y)
Therefore, it will take 4820 years to decay to half the original amount.
I hope it helps you!
Answer:
Option C.
Step-by-step explanation:
Hey there!
Given;
q^3 = 64
On finding value of "q" we need to transfer it to right side. So, on transfering cube to right side it becomes cuberoot.
![q = \sqrt[3]{64}](https://tex.z-dn.net/?f=q%20%3D%20%20%5Csqrt%5B3%5D%7B64%7D%20)
Therefore, q= cuberoot (64).
<em><u>Hope </u></em><em><u>it</u></em><em><u> helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
Answer and explanation:
Stellar is a Brazilian cryptocurrency that is used to facilitate low cost and flexible payment. It was renamed lumens and is denoted XLM.
One stellar lumen is currently equal to $0.219096
For the purpose of the question and since it does not specify exchange rates for each bank, let's assume:
Bank A= 0.219097 to 1 US dollar
Bank B= 0.219099 to 1 US dollar
Using Bank A to exchange $1700 for stellars= $1700*0.219097= 372.464 stellars
Using Bank B to exchange $1700 for stellars= $1700*0.229042= 389.3714 stellars
From the above, we can see that Bank B has a better exchange rate as it is cheaper than Bank A(gives more stellar) . She should therefore use Bank B for her exchange.