Question

how many significant figures are in the following number: * 0.000000000076
2
11
12
3
how many significant figures are in the following number: * 0.06780
6
5
4

Explanation:

Step1: Recall significant - figure rules

Non - zero digits are always significant. Leading zeros (zeros before non - zero digits) are not significant. Trailing zeros in a number with a decimal point are significant.

Step2: Analyze 0.00000000076

The leading zeros are not significant. Only the 7 and 6 are significant. So there are 2 significant figures.

Step3: Analyze 0.06780

The leading zero is not significant. The non - zero digits 6, 7, 8 and the trailing zero are significant. So there are 4 significant figures.

Answer:

1. A. 2
2. C. 4