Question

how many significant figures are in 6090?

Explanation:

Step1: Recall significant - figure rules

Non - zero digits are always significant. Zeros between non - zero digits are significant.

Step2: Analyze the number 6090

The digits 6, 0 (between 6 and 9), 9, and 0 (trailing non - decimal zero but after non - zero digits) are significant.

Answer:

4