Respuesta :

superman1987

Answer:

6.47 x 10⁵.

Explanation:

  • Rules for counting for multiplication or division:

The results are reported to the fewest significant  figures.

  • (2.08 x 10³) has 3 significant figures.
  • (3.11 x 10²)  has 2 significant figures.

So, the result should has 3 significant figures:

(2.08 x 10³)(3.11 x 10²) = 6.4688 x 10⁵.

  • To obtain the result with only 3 significant figures, we should use rules for rounding :

• In a series of calculations, carry the extra digits through to  the final result, then round.

• If the digit to be removed :

✓ is less than 5, the preceding digit stays the same.

For example, 1.33 rounds to 1.3.

✓ is equal to or greater than 5, the preceding digit is

increased by 1. For example, 1.36 rounds to 1.4.

So, the result will be 6.4688 x 10⁵ = 6.47 x 10⁵.

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