Question

Scientific Notation Online Practice
Complete this assessment to review what you've learned. It will not count toward your grade.
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Question
Which number is correctly written in scientific notation?(1 point)
Responses

0.2520 × 10−3
0.2520 times 10 superscript negative 3 baseline

25.20 × 103
25.20 times 10 cubed

10 × 103
10 times 10 cubed

2.520 × 103

Answer 1

In scientific notation, a number is correctly written when it is in the form \(a \times 10^n\), where \(a\) is a number greater than or equal to 1 and less than 10, and \(n\) is an integer.

Let’s evaluate the responses:

1. **0.2520 × 10−3** - Not in proper scientific notation, as \(0.2520\) is less than 1.
2. **25.20 × 103** - Not in proper scientific notation, as \(25.20\) is greater than 10.
3. **10 × 103** - Not in proper scientific notation, as \(10\) is not less than 10.
4. **2.520 × 103** - This is properly written in scientific notation, as \(2.520\) is between 1 and 10.

Thus, the correctly written number in scientific notation is **2.520 × 103**.