\( \Large \left(9.95\right)^{2} \times \left(2.01\right)^{3} = 2 \times \left(?\right)^{2} \)
Here, 9.95 is approximated to 10. 2.01 is approximated to 2 because calculating the squares or cubes of whole number is much easier than to calculate the square or cube of decimal numbers
\( \Large 2 \times \left(?\right)^{2} = \left(10\right)^{2} \times \left(2\right)^{3} = 100 \times 8 = 800 \)
= \( \Large \left(?\right)^{2} = 800 \)
= \( \Large \left(?\right)^{2} = 400 \)
Therefore, \( \Large ? = 20 \)