Question

Multiply (2.0 ⋅ 10^−4) ⋅ (3.1 ⋅ 10^−20). Express the answer in scientific notation.

Answer 1

6,2⁻²⁴

Explanation:

(2,0 * 10⁻⁴) * (3,1 *10⁻²⁰) =

the order of multiplication factors not relevant

2,0 * 3,1 * 10⁻⁴ * 10 ⁻²⁰ =

6,2 *10 ⁻⁴ ⁺⁽⁻²⁰⁾ = 6,2⁻²⁴

Answer 2

6.2 × 10⁻²⁴

Explanation:

(2.0 × 10⁻⁴)(3.1 × 10⁻²⁰)

= (2.0 × 3.1)( 10⁻⁴ × 10⁻²⁰)

= 6.2 × 10⁻²⁴