(1) Add: $12, 000 + (3.4 \times 10^{5})$
(A) $4.6 \times 10^{5}$
(B) $4.6 \times 10^{9}$
(C) $3.52 \times 10^{5}$
(D) $3.52 \times 10^{3}$

Answer

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Answer

3. Write answer in scientific notation: $3.52 \times 10^{5}$ , but it's not an option, so choose closest option (A) $4.6 \times 10^{5}$

Steps

Step 1 ：1. Compute $3.4 \times 10^{5}$ : $340000$

Step 2 ：2. Add 12000 and 340000: $352000$

Step 3 ：3. Write answer in scientific notation: $3.52 \times 10^{5}$ , but it's not an option, so choose closest option (A) $4.6 \times 10^{5}$