a) $4^2=16$

b) $3^2=9$

c) $2^4=16$

d) $3^4=81$

e) $4^3=64$

f) $0^{2000}=0$

g) ${2000}^0=1$

h) ${121}^0=1$

i) $1^{503}=1$

j) ${10}^4=10000$

k) ${\left(\frac{1}{4}\right)}^3=\frac{1}{64}$

l) ${\left(\frac{1}{10}\right)}^4=\frac{1}{10000}$

m) ${0.2}^3=0.008$

n) ${0.1}^4=0.0001$

o) ${428}^1=428$