The approximate weights of two animals are 5.36 x 104 lbs. and 6.2 x 104 lbs. Find the total weight of the two animals. Write the final answer in scientific notation with the correct number of significant digits.

12 x 104 lbs.
5.9 x 104 lbs.
1.22 x 105 lbs.
1.2 x 105 lbs.

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Respuesta :

The total weight of the two animals is 1.2 x 10^5 lbs

How to determine the total weight of the two animals?

The given parameters are

Animal 1 = 5.36 x 104 lbs.

Animal 2 = 6.2 x 104 lbs

Rewrite the parameters properly

Animal 1 = 5.36 x 10^4 lbs.

Animal 2 = 6.2 x 10^4 lbs

The total weight of the two animals is calculated as

Total weight = Animal 1 + Animal 2

This gives

Total weight = 5.36 x 10^4 lbs + 6.2 x 10^4 lbs.

Factor out 10^4 lbs

Total weight = (5.36 + 6.2) x 10^4 lbs.

Evaluate the sum

Total weight = 11.56 x 10^4 lbs.

Rewrite as

Total weight = 1.156 x 10^5 lbs.

Approximate

Total weight = 1.2 x 10^5 lbs.

Hence, the total weight of the two animals is 1.2 x 10^5 lbs

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