Find the speed of a particle with the given position function. 
Definitions:
Polypeptide
An organic linear polymer comprised of numerous amino-acid residues linked in a sequence, which constitutes a portion of or an entire protein molecule.
MRNA
Messenger RNA, a type of RNA that carries genetic information from DNA to the ribosome, where proteins are synthesized.
Surface Area
The total area of the external layer or surface of an object or body, often relevant in processes such as absorption and evaporation.
Volume Ratio
A comparative measure of the volume of one substance or entity to another, often used in scientific experiments and calculations.
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