Exponents and P...

If $$\left(\dfrac{3}{2}\right)^2 \times \left(\dfrac{3}{2}\right)^{a+5}=\left(\dfrac{3}{2}\right)^8$$, then $$a =$$______ .

Which expression is equivalent to $$(9^{ \ 2})$$ 

$${ \left( \dfrac { 2 }{ 3 }  \right)  }^{ 0 }=?$$

If $$x$$ be any non-zero integer and $$m,n$$ be positive integers, then $$x^m \times x^n$$ is equal to

If $$x$$ be any non-zero integers, then $$x^{-1}$$ is equal to

If $$y$$ is any non-zero integer, then $$y^0$$ is equal to ....

Choose the correct answer from the given four options:
The usual form of $$5.658 \times 10^5$$ is

The standard form of $$751.65$$ is

Evaluate the following:
$$ 2.3 \times {10}^{11} + 3.2 \times{10}^{11}$$

Which of the following numbers should be added to $$4 \times {10}^5$$ to get $$5.3 \times {10}^5$$?