### Sample significant figure problems:

### d) 511.600

### Answer

### To determine the number of significant figures in this number
we must apply rule #1 and #4...

### 1. All nonzero digits are significant.

### 4. Zeros are significant when they
appear; in the middle of a number, at the end of a number that
includes a decimal point.

### Therefore this number has 6 significant figures (sig figs).