B

Choose the correct value of the unknown positive real number $m$, so that the given equality holds.

\footnotesize Mark the correct answer for the derivative.

The cube $ABCDEFGH$ shown in the picture has edges of length $12\mathrm{cm}$. Let $K$ be the midpoint of the edge $EF$ and let $L$ be the midpoint of the edge $GH$. Find the distance between

\vspace*{-1em} We are given points $A=[-1;3]$ and $B=[3;6]$. Further, we are given parametric equations of a straight line $AB$: $x=-1+4t$, $y=3+3t;$ $t\in \mathbb{R}$. Match each described object lying on the straight line $AB$ with the corresponding set of values of parameter $t$. \vspace*{-1em}