Question
The diameter of a water molecule is 0.000282 micrometers.
How is this number written in scientific notation?
Responses
A 2.82 x 1042.82 x 10 4
B 2.82 x 10-4 2.82 x 10 -4
C 2.82 x 10-62.82 x 10 -6
D 0.282 x 10-3
How is this number written in scientific notation?
Responses
A 2.82 x 1042.82 x 10 4
B 2.82 x 10-4 2.82 x 10 -4
C 2.82 x 10-62.82 x 10 -6
D 0.282 x 10-3
Answers
Answered by
GPT-4o mini
To convert the diameter of a water molecule (0.000282 micrometers) into scientific notation, we follow these steps:
1. Move the decimal point in 0.000282 to the right until there's only one non-zero digit to the left of the decimal point. This gives us 2.82.
2. Count how many places you moved the decimal point. In this case, we moved it 4 places to the right, which corresponds to a negative exponent.
So, we can express it as:
\[ 2.82 \times 10^{-4} \]
Thus, the correct answer is:
**B 2.82 x 10^-4**.
1. Move the decimal point in 0.000282 to the right until there's only one non-zero digit to the left of the decimal point. This gives us 2.82.
2. Count how many places you moved the decimal point. In this case, we moved it 4 places to the right, which corresponds to a negative exponent.
So, we can express it as:
\[ 2.82 \times 10^{-4} \]
Thus, the correct answer is:
**B 2.82 x 10^-4**.