State two features that are shown by all molecules

characteristics of molecules are:

1. Molecules have definite size and mass.

2. Molecules have space between them.  

3. Molecules are in constant random motion.

4. A molecule has only one configuration

5. The mass is equal to sum of masses of all individual atoms in molecular structure

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All the molecules have definate size and definate mass, According to their function. :D

This is a perfect example of exponential decay. In this case the growth factor should be represented by a fraction, and it is! This forest, starting out with apparently ( 800? ) pine trees, has a disease spreading, which kills 1 / 4th of each of the pine trees yearly. Therefore, the pine trees remaining should be 3 / 4.

Respectively 3 / 4 should be the growth factor, starting with 800 pine trees - the start value. This can be represented as such,

- where a = start value, b = growth factor, t = time ( variable quantity )

____

Thus, the function can model this problem. The forest after t years should have P( t ) number of pine trees remaining.