Question

I need to know this answer I've worked it out but not sure

Answer 1

= r^-5 s^4t ^4
= s^4 t^4 / r^5

answer

answer is B, s^4 t^4 / r^5

Answer 2

$\cfrac{r^{-3}s^5t^2}{r^2st^{-2}} = \cfrac{s^4*t^2*t^2}{r^2*r^3} =\cfrac{s^4t^4}{r^5}$

Answer is B.