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Question

What is the exponent () in 1.3×10=13,000?

A
3
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B
4
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C
5
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D
6
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Solution

The correct option is B 4
Need to find:–––––––––––––– The exponent () in 1.3×10=13,000

Multiplying by 10=101: Decimal point moves 1 unit to the right, i.e.,
1.3×10=13.0=13

Multiplying by 100=102: Decimal point moves 2 units to the right, i.e.,
1.3×100=130.0=130

Multiplying by 1,000=103: Decimal point moves 3 units to the right, i.e.,
1.3×1,000=1,300.0=1,300

Multiplying by 10,000=104: Decimal point moves 4 units to the right, i.e.,
1.3×10,000=13,000.0=13,000–––––––––––––––––––––––––––––––––––

1.3×10,000=1.3×104=13,000.0=13,000––––––––––––––––––––––––––––––––

Hence, the exponent () in 1.3×10=13,000 is 4, i.e., option (b.) is the correct one.

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