111.009 rounded to four significant digits is 111.0
Three of them.
1.0e3L
1,000 to 2 s.f., or 1,000 (2 s.f.) or 1,000.
Because March 14th or 3-14 are the first 3 digits of pi which are 3.14
111.009 rounded to four significant digits is 111.0
4.
Three of them.
111.0
111.0
1.0e3L
1042L rounded off to two significant digits is 1000L. The digit "1" in the hundreds place is the most significant digit, so the number is rounded down to 1000L.
1,040 to 3 s.f., or 1,040 (3 s.f.) or 1,040.
1,000 to 2 s.f., or 1,000 (2 s.f.) or 1,000.
Because March 14th or 3-14 are the first 3 digits of pi which are 3.14
One. Although integers ending in 0 are ambiguous. If the number is known to be accurate to the nearest ten, for example, then there are 3 significant digits.
significant digits