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Quantities and Units - Engineering

Q1:

The number 4,500,000 can be expressed as

A 4,500 × 106

B 4.5 × 106

C 4.5 × 10-3

D either 4,500 × 104 or 4.5 × 106

ANS:B - 4.5 × 106

45*10^5 divided by 10 and multiple by 10.
(45*10^5 *10)/10.
4.5*10^6.
Answer B is correct.