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

\[=1.4\times10^3\times2.5\times10^{-6}\]

Answer 2

\[=(1.4\times2.5)\times10^{3-6}\]

Answer 3

\[=3.5\times10^{-3}\]