Mathematics

Problem

The position of a particle moving along a straight line is given by

x = 5 t^{2} + 2 t

(SI units). Find its instantaneous velocity at

t = 3\,\text{s}

. a)

30\,\text{m}\,\text{s}^{-1}

32\,\text{m}\,\text{s}^{-1}

37\,\text{m}\,\text{s}^{-1}

17\,\text{m}\,\text{s}^{-1}