Andhra Pradesh Board Solutions for Chapter: Exponents and Powers, Exercise 8: Exercise - 4.2

In a pack, there are $5$ books, each of thickness $20 \mathrm{mm}$ and $5$ paper sheets each of thickness $0.016 \mathrm{mm}$. What is the total thickness of the pack.

Express the following in the standard form.

The diameter of a wire on a computer chip is $0.000005 \mathrm{cm}$

In a pack, there are $5$ books, each of thickness $20 \mathrm{mm}$ and $5$ paper sheets each of thickness $0.016 \mathrm{mm}$. If the total thickness of the pack in standard form is $1.0008\times a^b$, then $a+b=$

Rakesh solved a problem of exponents in the following way. Do you agree with the solution? If not why? Justify your argument.

$x^{-3}\times x^{-2}=x^{-6}$

Rakesh solved a problem of exponents in the following way. Do you agree with the solution? If not why? Justify your argument.

$\frac{x^3}{x^2}=x^4$

Rakesh solved a problem of exponents in the following way. Do you agree with the solution? If not why? Justify your argument.

${\left(x^2\right)}^3=x^8$

Rakesh solved a problem of exponents in the following way. Do you agree with the solution? If not why? Justify your argument.

$x^{-2}=\sqrt{x}$

Rakesh solved a problem of exponents in the following way. Do you agree with the solution? If not why? Justify your argument.

$3x^{-1}=\frac{1}{3x}$