Answer:


In scientific notation, a number is written between 1 and 10 multiplied by a power of 10.
where m lies between 1 and 10 and n is an integer.
So, 78744 can be written in scientific notation as :

Significant digits in the answer depends on the least significant digits in the multipliers. The significant digits in the multipliers is 3. Therefore, the answer must contain 3 significant digits.
Answer:
