Question

1)Simplify root of 5( 2 3/4 -3/10) ,

2) (root of 64 × root of 0.0064) + root of 0.64

Answer 1

$$\begin{gathered} \left(\sqrt{64}\times \sqrt{0.0064}\right)+\sqrt{.64} \\ =\left(\sqrt{8\times 8}\times \sqrt{0.08\times 0.08}\right)+\sqrt{0.8\times 0.8} \\ =\left(8\times 0.08\right)+0.8 \\ =0.64+0.8 \\ =1.44 \end{gathered}$$