Chapter 5 - Section 5.2 - More Work with Exponents and Scientific Notation - Exercise Set - Page 268: 87

$2.5808 \times 10^{-5}$ square meters.

$4 \times 10^{-2} \times 6.452 \times 10^{-4}$ $= 4 \times 6.452 \times 10^{-4} \times 10^{-2}$ Using $[a^{m} \times a^{n} = a^{m+n}]$ $= 25.808 \times 10^{-6}$ square meters. OR $2.5808 \times 10^{-5}$ square meters.