Ответ:

  1. \(9^{2\frac12}=9^{\frac52}=\left(\sqrt9\right)^5=3^5=243\).
  2. \(0.16^{1\frac12}=0.16^{\frac32}=\left(\sqrt{0.16}\right)^3=0.4^3=0.064\).
  3. \(\left(3\frac38\right)^{\frac43}=\left(\frac{27}{8}\right)^{\frac43}=\left(\sqrt[3]{\frac{27}{8}}\right)^4=\left(\frac32\right)^4=\frac{81}{16}\).
  4. \(0.001^{\frac23}=\left(\sqrt[3]{0.001}\right)^2=0.1^2=0.01\).

Ответ: а) 243; б) 0,064; в) \(\frac{81}{16}\); г) 0,01.