# NCERT solutions Mathematics Textbook for Class 8 chapter 12 Exponents and Powers

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### Chapter 12 - Exponents and Powers

#### Page 200

Express the given numbers in standard form.

0.0000000000085

Q 1.1 | Page 200 |

Express the given numbers in standard form.

0.00000000000942

Q 1.2 | Page 200 |

Express the given numbers in standard form.

6020000000000000

Q 1.3 | Page 200 |

Express the given numbers in standard form.

0.00000000837

Q 1.4 | Page 200 |

Express the given numbers in standard form.

31860000000

Q 1.5 | Page 200 |

Express the given numbers in usual form.

3.02 × 10−6

Q 2.1 | Page 200 |

Express the given numbers in usual form.

4.5 × 104

Q 2.2 | Page 200 |

Express the given numbers in usual form

3 × 10−8

Q 2.3 | Page 200 |

Express the given numbers in standard form.

1.0001 × 109

Q 2.4 | Page 200 |

Express the given numbers in standard form.

5.8 × 1012

Q 2.5 | Page 200 |

Express the given numbers in standard form.

5.8 × 1012

Q 2.5 | Page 200 |

Express the given numbers in standard form.

3.61492 × 106

Q 2.6 | Page 200 |

Express the number appearing in the given statements in standard form

1 micron is equal to 1/1000000 m

Q 3.1 | Page 200 |

Express the number appearing in the given statements in standard form

Charge of an electron is 0.000, 000, 000, 000, 000, 000, 16 coulomb.

Q 3.2 | Page 200 |

Express the number appearing in the given statements in standard form

Size of a bacteria is 0.0000005 m

Q 3.3 | Page 200 |

Express the number appearing in the given statements in standard form

Size of a plant cell is 0.00001275 m

Q 3.4 | Page 200 |

Express the number appearing in the given statements in standard form

Thickness of a thick paper is 0.07 mm

Q 3.5 | Page 200 |

In a stack there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack?

Q 4 | Page 200 |