Question

What is the product written in scientific notation? (1.4 × 103)(2.5 × 10–6) A. 3.9 × 10–3 B. 3.9 × 10–18 C. 3.5 × 10–3 D. 3.5 × 10–2

Answer 1

Just multiply as shown below:-

1.4 * 2.5 = 3.5
10^-6 and 10^3 = 10^-6+3 = 10^-3

3.5 * 10^-3

Answer: C. 3.5 × 10–3

Answer 2

Hi

1.4 × 10³ × 2.5 × 10⁻⁶ = 1.4 × 2.5 × 10³ × 10⁻⁶ = 3.5 × 10⁻³

1.4 × 2.5 = 3.5 

10³ × 10⁻⁶ = 10³⁻⁶ = 10⁻³

Answer: C) 3.5 × 10⁻³