Mathematics

Problem

The position of a particle moving along a line is

s(t)=3t^{3}-5t^{2}+4t+7

, where

s

is measured in meters and

t

in seconds. What is the particle’s velocity at

t=2\text{ s}

? a)

26\text{ m/s}

20\text{ m/s}

-4\text{ m/s}

18\text{ m/s}