4
37.753 rounded to one significant figure becomes 40
40
Rounded to one significant figure it becomes 40
40
39 remains 39 when rounded to one significant figure.
40 is no more significant than other numbers, and considerably less so than numbers such as π or e.
To one significant digit, 37.19 is 4x101. Writing it as 40 makes it unclear as to whether you have 1 significant digit or 2.
40 hundreds, or 40 x 100 = 4,000 (four thousand)
First, you have to figure out what 40% of 250 is. Then, you have to substract that number from 250.So:40% of 250 = 0,40 * 250 = 100250 - 100 = 150
both 40 and 400 have one because there is no "." the 0.7000 has four SF because you know that the first three digits after the seven are exact while the last zero could be rounded. the concept is a little tough to get but once you do its pretty simple.
Aboriginals have been in Australia for 40 to 60 thousand years. There's no way of telling who was the first.
50-40 thousand years ago