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Quantities and Units

Q1:

The number 65,000 expressed in scientific notation as a number between 1 and 10 times a power of ten is

A 0.65 × 104

B 6.5 × 104

C 65 × 104

D 650 × 103

ANS:B - 6.5 × 104

The number 65,000 can be expressed in different scientific notations.

6.5 x 10^4
65 x 10^3
650 x 10^2
6500 x 10^1 .

These are all right, but based on the question "expressed in scientific notation as a number between 1 and 10 times a power of ten "
Option B is the correct answer, the number "6.5" is between 1 and 10.



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