As given by the question:
There are given the expression;
(a):
[tex]\begin{gathered} 1.4^2=1.4\times1.4 \\ =1.96 \end{gathered}[/tex]
Hence, the value of the expression is 1.96.
Now,
(b):
[tex]\begin{gathered} 300\div2(0.5+4.5)^2=300\div2(5)^2 \\ =300\div2(25) \\ =300\div50 \\ =6 \end{gathered}[/tex]
Hence, the value of the given expression is 6.
(B):
[tex]\begin{gathered} \frac{1}{3}\div2\cdot(\frac{1}{2})^3=\frac{1}{3}\div2\cdot(\frac{1}{8}) \\ =\frac{1}{3}\div2\cdot(\frac{1}{8}) \\ =\frac{1}{3}\times\frac{1}{2}\cdot(\frac{1}{8}) \\ =\frac{1}{48} \end{gathered}[/tex]
Hence, the value of the given expression is shown below:
[tex]\frac{1}{48}[/tex]
