Question

Helpp plsss and thank youu

Answer 1

answer : option C

$(4r^{-2}st^4)^2(r^{-4}st^6)^{-2}$

Multiply the exponent -2 inside the parenthesis

$(4^2r^{-4}s^2t^8)(r^{8}s^{-2}t^{-12})$

When we multiply same terms we add the exponents

$(4^2r^{-4+8}s^{2-2}t^{8-12})$

$(4^2r^{4}s^{0}t^{-4})$

Now make the exponent positive

$\frac{16r^4}{t^4}$