Answer:
The number of significant figures are 4.
Step-by-step explanation:
The significant figures of a number are those that have a real meaning and, therefore, provide some information.
Significant figures are counted from left to right, starting with the first non-zero digit. The zeros preceding the first non-zero number are not significant. But in a decimal number the zeros to the right of the comma are significant.
So, in this case, all the figures are significant, being a total of 4 (7,1,1,0).