Question

how many significant figures in the number below? 4.56 x 10^3

Explanation:

Step1: Recall significant - figures rule for scientific notation

In scientific notation \(a\times10^{n}\), the significant figures are determined by the digits in \(a\).

Step2: Count digits in \(a\)

For \(4.56\times 10^{3}\), the number \(a = 4.56\). The digits 4, 5, and 6 are significant. So there are 3 significant figures.

Answer:

3