simplify write in scientific notation

(9x10^-3)^2

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To simplify and write the expression (9x10^-3)^2 in scientific notation, follow these steps:

Step 1: Square the base.
(9x10^-3)^2 = (9^2)x(10^-3)^2

Step 2: Simplify each part separately.
(9^2) = 81
(10^-3)^2 = 10^(-3x2) = 10^-6

Step 3: Multiply the simplified results together.
81x10^-6 = 8.1x10^-5

Therefore, (9x10^-3)^2 simplified and written in scientific notation is 8.1x10^-5.