Which digit on the following number is the one that determines its precision ? 30.8

The least-significant digit is used to determine the precision. Here, that digit is the one in the tenths place, 8.

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.