Question

Add . Which is the correct sum?
(1 point)
7.3 × 10 + 1.8 ×
7 10
7
9.1 × 10
7
9.1 + 10
7
8.1 × 10
7
9.1 × 10
14

Answer 1

To calculate the correct sum from the given options, we'll first clarify the mathematical expressions involved. Assuming each option presents a scientific notation multiplied or summed, we can perform the required calculations.

1. **Calculate each expression:**

- **Option 1:** \(7.3 \times 10^7 + 1.8 \times 10^7\)
- **Option 2:** \(9.1 \times 10^7\)
- **Option 3:** \(9.1 + 10^7\) — note that adding \(10^7\) directly doesn’t connect with scientific notation consideration.
- **Option 4:** \(8.1 \times 10^7\)
- **Option 5:** \(9.1 \times 10^{14}\)

2. **Perform the sum for Option 1:**

\[
7.3 \times 10^7 + 1.8 \times 10^7 = (7.3 + 1.8) \times 10^7 = 9.1 \times 10^7
\]

3. **Compare the result with other options:**

- **Result of Option 1:** \(9.1 \times 10^7\) matches **Option 2** \( (9.1 \times 10^7) \).

Thus, the correct sum is **Option 2: \(9.1 \times 10^7\)**.