Question

Some of the migratory birds travel as much as $12,487$ km to escape the extreme climatic conditions at home. Express the distance travelled by the migratory birds in scientific notation.

• A. $12.487\times {10}^3$ km
• B. $12487\times {10}^0$ km
• C. $1.2487\times {10}^4$ km
• D. $0.12487\times {10}^5$

Answer 1

The correct option is C $1.2487\times {10}^4$ km

Distance travelled by the migratory birds to avoid the extreme climatic condition at home $=12,487$ km

To represent $12,487.0$ in scientific notation, we can shift the decimal point $4$ units to the left such that we can place the decimal point just right of the leftmost non-zero number.

And, $4$ places left movement of the decimal point ensures the exponent to the base $10$ to be $4$.

$\therefore$ Scientific notation of $12,487$ km is $1.2487\times {10}^4$ km.

Hence, option (c.) is the corrent one.