Find 0.078 - (5.2 × 10^-³). Express your answer in scientific notation. Do not round your answer.

Answer 1

We can rewrite $0.078$ in scientific notation as $7.8 \times 10^{-2}$. Therefore, $0.078-(5.2 \times 10^{-3}) = 7.8 \times 10^{-2}-(5.2 \times 10^{-3}) = \boxed{7.7948 \times 10^{-2}}$.