Question

m=k/s solve for k
Answer choices
K=m/s
K=ms
K=s/m
K=m+s

Answer 1

                                 M = k/s

Watch closely:

Multiply each side by 's':    M s = k

Answer 2

$m=\frac{k}s$
$s*m=s*\frac{k}s$
$\boxed{m*s=k}$