Answer
a) The constant and the variable both get the exponent (via distribution).
b) $r^{20}$$s^{20}$
Work Step by Step
a) $(3n)^2$ = $3^2$*$n^2$ = $9n^2$
Both the constant and the variable get the exponent.
b)
$(rs)^{20}$ = $r^{20}*s^{20}$ = $r^{20}s^{20}$
