Answer: Since 81 mice have black fur, around 63.28% (Approx. 68.3%) of the mice have black fur.
Explanation: Evaluate the question carefully. We have a population of 128 mice, and 47 of them have gray fur, and the rest have black fur. That means that the other mice, besides the 47, have black fur.
![128 - 47 = 81](https://tex.z-dn.net/?f=128%20-%2047%20%3D%2081)
To calculate percentages, I come up with proportions. 81 black fur mice over the total mice is equal to x over 100.
![\frac{81}{128} = \frac{x}{100}](https://tex.z-dn.net/?f=%5Cfrac%7B81%7D%7B128%7D%20%3D%20%5Cfrac%7Bx%7D%7B100%7D)
To solve the proportion, cross multiply and then divide.
![81 * 100 / 128 = 63.28125](https://tex.z-dn.net/?f=81%20%2A%20100%20%2F%20128%20%3D%2063.28125)
Round your answer to the nearest tenth.
%
Bohr's model treats electron energy levels as clearly defined orbital paths around the nucleus like planets orbit the Sun. The cloud model treats the energy levels as probability clouds, regions in which electrons are likely to be found.