Define Analytical chemistry. Why is accurate measurement crucial in science?

How many significant figures are in the following quantity, $45.26 \mathrm{ft}$.

How many significant figures are in the following quantity $0.109 \mathrm{in}$?

How many significant figures are in the following quantity $0.00025 \mathrm{kg}$?

How many significant figures are in the following quantity, $2.3659\times {10}^{-8} \mathrm{cm}$.

How many significant figures are in the following quantity, $52.0 {\mathrm{cm}}^3$?

How many significant figures are in the following quantity, $0.00020 \mathrm{kg}$?

How many significant figures are in the following quantity $8.50 \times {10}^4 \mathrm{mm}$?
 

How many significant figures are in the following quantity ?