Question

1721 to 1 significant figure
1975 to 2 significant figure
76.71 to 1 decimal point​

Answer 1

1.) 2000
2.) 2000
3.) 76.8

1 significant figure just means one number that isn’t a 0

2 significant figures just means 2 numbers that aren’t 0s

1 decimal point just means that after the decimals there’s only one number

Hope this helps :D

Answer 2

If you need it rounded, it would be 2 then 20 then 76.1. If you just need the base numbers, it would be 1 then 19 then 76.7