Question

how many significant figures are in this number ? 1.7 × 10⁻³

Explanation:

Step1: Recall significant figure rules for scientific notation

In scientific notation \(a\times10^{n}\), the significant figures are in the coefficient \(a\). Non - zero digits are always significant.

Step2: Analyze the coefficient \(1.7\)

The coefficient here is \(1.7\). The digit \(1\) and the digit \(7\) are non - zero digits. So we count the number of non - zero digits in the coefficient. There are 2 non - zero digits.

Answer:

2