The given answer from the calculator is 9.1E-2, which means 9.1 × 10⁻² in scientific notation. This is equivalent to:

$9.1 × 10^{-2} = \frac{9.1}{100} = 0.091$

Now, let's analyze the given answer choices:

1. 9.1 × 10⁻² ✅ (Correct, as it matches the given value)
2. 0.091 ✅ (Correct, as it's the decimal equivalent of 9.1 × 10⁻²)
3. 9.1⁻² ❌ (Incorrect, since 9.1⁻² means 1 / (9.1²), which is not 0.091)
4. 0.012 ❌ (Incorrect, as 0.012 is not equal to 0.091)
5. -18.2 ❌ (Incorrect, completely unrelated value)
6. 9.1 · 10⁻² ✅ (Correct, as it's another way of writing 9.1 × 10⁻²)

Correct Answers:

✔ 9.1 × 10⁻²
✔ 0.091
✔ 9.1 · 10⁻²

Do you want further clarification on any step?

Related Questions:

1. How do you convert scientific notation to decimal form?
2. Why is 9.1⁻² not equivalent to 9.1 × 10⁻²?
3. How do negative exponents work in mathematical expressions?
4. What are some common mistakes when interpreting scientific notation?
5. How do you convert a decimal number back into scientific notation?

Tip:

When converting scientific notation to decimal, remember that 10⁻² means dividing by 100, 10⁻³ means dividing by 1000, and so on.