Question

question 2
how many significant figures are in the following measurement?
0.00008550 km

Explanation:

Step1: Identify leading zeros

Leading zeros (before non-zero digits) are not significant. In 0.00008550, the first 5 zeros are leading.

Step2: Identify non-zero digits

Non-zero digits are always significant. Here, 8, 5, 5 are significant.

Step3: Identify trailing zero

Trailing zeros after a decimal point (after non-zero digits) are significant. The final 0 is significant.

Step4: Count significant figures

Count the significant digits: 8, 5, 5, 0.

Answer:

4