Find 5.45− (3.2×10^−2) . Express your answer in scientific notation

Answer 1

We can write $5.45$ as $5.45 \times 10^0$. Multiplying, we get \[5.45\times 10^0 - (3.2\times 10^{-2}) = 5.45\times 10^0 - 3.2\times 10^{-2}.\]We have a common power of 10, so we can subtract the coefficients to get \[(5.45 - 3.2)\times 10^0.\]The result is $\boxed{2.25 \times 10^0}$ or just $\boxed{2.25}.$