Written in usual form, 3 x 10^-5 is:
A0.03000
B0.00003
C0.00030
D0.00300
Answer & Solution
Correct answer: B. 0.00003
1. A negative exponent of five means five decimal places.
2. So 3 moves five places to the right of the point.
3. The usual form is 0.00003.
4. So the answer is 0.00003.
_Source: NCERT Class 8 Mathematics, Ch 10 'Exponents and Powers'_
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