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

Answer 1

To subtract decimals in scientific notation, we need to have the same power of 10. We can rewrite 0.078 as $7.8 \times 10^{-2}$. $$0.078 − (5.2 × 10^{-3}) = 7.8 \times 10^{-2} - 5.2 \times 10^{-3} = (7.8 - 5.2) \times 10^{-2} = 2.6 \times 10^{-2}$$ Therefore, the answer is $\boxed{2.6 \times 10^{-2}}$.

Answer 2

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

Answer 3

To subtract decimals in scientific notation, we need to have the same power of 10. We can rewrite 0.078 as $7.8 \times 10^{-2}$. $$0.078 − (5.2 × 10^{-3}) = 7.8 \times 10^{-2} - 5.2 \times 10^{-3} = (7.8 - 0.52) \times 10^{-2} = 7.28 \times 10^{-2}$$ Therefore, the answer is $\boxed{7.28 \times 10^{-2}}$.