Compare the thickness of a piece of paper to the diameter of a wire on a computer chip.

Thickness of a piece of paper $=0.0016 \mathrm{cm}$

Diameter of a wire on a computer chip $=0.000003 \mathrm{m}$

The number of red blood cells per cubic millimetre of blood is approximately $5.5$ million. If the average body contains $5$ litres of blood, what is the total number of red cell in the body? $(1$ litre $=1,00,000 {\mathrm{mm}}^3)$. If the total number f blood cells in the body is $k\times {10}^{12}$. Find the value of $k$.

Multiplicative inverse of ${\left(\frac{-4}{5}\right)}^2=$_____.

The standard form of $0.000182=$_____ $\times {10}^{-4}$ .

The standard form of $0.00000003572$ is _____ $\times {10}^{-8}$ .

Write the expanded form of $273.92$ using exponents.

If $(-7{)}^x\times {\left(\frac{1}{-7}\right)}^{-3}=7^8$, then value of $x$ is _____.