There are around \( 7.6 \times 10^{8} \) cows and \( 4.9 \times 10^{7} \) horses in the United States. How many cows and horses in total are in the United States?
\( 7.11 \times 10^{8} \)
8. \( 09 \times 10^{8} \)
\( 7.11 \times 10^{1} \)
\( 8.09 \times 10^{7} \)

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Answer

\( 8.09 \times 10^{8} \)

Steps

Step 1 ：\( 7.6 \times 10^{8} + 4.9 \times 10^{7} \)

Step 2 ：\( (7.6 \times 10^{1}) \times 10^{8} + (4.9 \times 10^{0}) \times 10^{8} \)

Step 3 ：\( 8.09 \times 10^{8} \)