Answer
a) 6$x^3$$y^5$
b) $\frac{25w^4}{z}$
Work Step by Step
a) (3$x^3$$y^2$)(2$y^3$) = (2)(3)$x^3$$y^{2+3}$ = 6$x^3$$y^{5}$
b) $(5$$w^2$$z^{-2}$)$^{2}$($z^3$) = $5^2$$w^{(2)(2)}$$z^{(-2)(2)}$$z^3$ = 25$w^4$$z^{-4+3}$ = 25$w^4$$z^{-1}$ = $\frac{25w^4}{z}$