code class$=$"asciimath"$>$A $2\mathrm{.}0-$C charge moves with a velocity of $(2\mathrm{.}0$i $+4\mathrm{.}05+6\mathrm{.}0$k$)($ m$)/($s$)$ and experiences a magnetic force of $(4\mathrm{.}01-20]+12$k