Speed of a jet is 130000 m - s- In the standard form- we write it as 1-3 - 10 a m - s- The value of a is -A- 4B- 5C- 6D- -6

The correct option is B 5Speed of the jet=130000 m/s=13× 10000 m/s =13× 10^4 m/s=1.3× 10× 10^4 m/s =1.3× 10^5 m/s (∵ a^m× a^n=a^m+n) ...

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Standard VII

Mathematics

Normal Form to Standard Form

Speed of a je...

Question

Speed of a jet is 130000 m/s. In the standard form, we write it as $1.3 \times 10^{a}$ m/s. The value of a is .

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Solution

The correct option is B 5
$Speed of the jet = 130000 m/s = 13 \times 10000 m/s$
$= 13 \times 10^{4} m/s = 1.3 \times 10 \times 10^{4} m/s$
$= 1.3 \times 10^{5} m/s (∵ a^{m} \times a^{n} = a^{m + n})$

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Speed of a jet is 130000 m/s. In the standard form, we write it as 1.3×10a m/s. The value of a is .

The correct option is B 5Speed of the jet=130000 m/s=13×10000 m/s =13×104 m/s=1.3×10×104 m/s =1.3×105 m/s (∵am×an=am+n)

Speed of a jet is 130000 m/s. In the standard form, we write it as $1.3 \times 10^{a}$ m/s. The value of a is .

The correct option is B 5
$Speed of the jet = 130000 m/s = 13 \times 10000 m/s$
$= 13 \times 10^{4} m/s = 1.3 \times 10 \times 10^{4} m/s$
$= 1.3 \times 10^{5} m/s (∵ a^{m} \times a^{n} = a^{m + n})$