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Exponents and Powers — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSExponents and Powers1 Mark
MCQ
Size of a bacteria is $0.00000063m$ Express it into standard form:
  • A
    $6.3 \times 10^{-6}$
  • B
    $6.3 \times 10^{-10}$
  • ✓
    $6.3 \times 10^{-7}$
  • D
    $6.3 \times 10^{-8}$
✓

Answer

Correct option: C.
$6.3 \times 10^{-7}$
C.   $6.3 \times 10^{-7}$
Solution:
$0.00000063 = 6.3 \times 10^{-8}$
$= 6.3 \times 10 \times 10^{-8}$
$= 6.3 \times 10^{-7}$

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