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The approximate weights of two animals are 4.23 x 10^3 lbs. and 8.7 x 10^

3 lbs. Find the total weight of the two animals. Write the final answer in scientific notation with the correct number of significant digits.


1.29 x 10^4 lbs.

1.3 x 10^4 lbs.

5.1 x 10^3 lbs.

12 x 10^3 lbs.
HELP ASAP correct answer please

Respuesta :

Answer: 1.29 x 104 lbs.

Step-by-step explanation:

4.23 x 103 lbs. and 8.7 x 103 lbs.

4.23 x 103 + 8.7 x 103 =

4.23 x 10^3 + 8.7 x 10^3 =

(4.23+8.7) x 10^3 =

(4.23+8.70) x 10^3 =

(12.93) x 10^3 =

1.293 x 10 x 10^3 =

1.293 x 10^1 x 10^3 =

1.293 x 10^(1+3) =

1.293 x 10^4 =

1.293 x 10^4 = 1.29 x 104 lbs.
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