Question
What is 0.00000025 expressed in scientific notation?
A. 2.5×10^−8
B. 2.5×10^−7
C. 2.5×10^7
D. 2.5×10^8
A. 2.5×10^−8
B. 2.5×10^−7
C. 2.5×10^7
D. 2.5×10^8
Answers
GPT-4o mini
To express the number 0.00000025 in scientific notation, we need to move the decimal point so that there is only one non-zero digit to its left.
For 0.00000025, we move the decimal point 8 places to the right, which gives us 2.5. Since we moved the decimal point to the right, the exponent will be negative.
Thus, the scientific notation is:
\[ 2.5 \times 10^{-8} \]
Therefore, the correct answer is:
**A. \( 2.5 \times 10^{-8} \)**
For 0.00000025, we move the decimal point 8 places to the right, which gives us 2.5. Since we moved the decimal point to the right, the exponent will be negative.
Thus, the scientific notation is:
\[ 2.5 \times 10^{-8} \]
Therefore, the correct answer is:
**A. \( 2.5 \times 10^{-8} \)**