Answer:
Cu ---> Oxidized, HNO3 ---> Reduced.
Explanation:
Refer to attachment.
Copper (Cu) is gaining oxygen, hence, it's oxidized. On the other hand, HNO3 is losing hydrogen, hence, it's reduced.
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They are inverse of logarithmic equations. The value of b to the nearest tenth is 0.1
<h3>Exponential equations</h3>
They are inverse of logarithmic equations. Given the exponential function that modelled the penicillin concentration, in micrograms per milliliter as shown:
![P(t) = 200b^{\frac{6}{5} }](https://tex.z-dn.net/?f=P%28t%29%20%3D%20200b%5E%7B%5Cfrac%7B6%7D%7B5%7D%20%7D)
If the value of P(t) is 10, hence;
![10 = 200b^{\frac{6}{5} }\\\frac{10}{200} = b^{\frac{6}{5} } \\0.05= b^{\frac{6}{5} } \\](https://tex.z-dn.net/?f=10%20%3D%20200b%5E%7B%5Cfrac%7B6%7D%7B5%7D%20%7D%5C%5C%5Cfrac%7B10%7D%7B200%7D%20%3D%20b%5E%7B%5Cfrac%7B6%7D%7B5%7D%20%7D%20%5C%5C0.05%3D%20b%5E%7B%5Cfrac%7B6%7D%7B5%7D%20%7D%20%5C%5C)
Take the ln of both sides
ln0.05 = 6/5 lnb
-2.995 = 1.2 ln b
lnb = -2.495
b = e^-2.495
b = 0.08
Hence the value of b to the nearest tenth is 0.1
Learn more on exponential function here; brainly.com/question/2456547
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