Question $8$

The correct value of the following expression is:

$\frac{({10}^{70}{10}^{-40}{)}^3}{({10}^{60}{)}^{\frac{1}{3}}}$

${10}^{60}$

${10}^{80}$

${10}^{70}$

${10}^{40}$

Question $9$

Round off $5\mathrm{.}99999$ to four significant figures.

$5\mathrm{.}999$

$6$

$6\mathrm{.}000$

$6\mathrm{.}444$