A yellow circular sign with an X typically indicates a railroad crossing ahead. This sign warns drivers to be cautious and prepared to stop in case a train is approaching. It is important to obey this sign and be vigilant for any oncoming trains to ensure safety on the road.
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A yellow circular sign with an X in the middle of it means a railroad crossing is coming up. It is used to let drivers known when a railroad crossing is coming.
Pi x r2 x h
Pi x r² x h
1 circular mil = 1 mil x 1 mil a=d2 so if a wire has a diameter of 80 mils, it has an area of 6400 circular mils.
"At least" is expressed with the "greater or equal" sign, for example, x >= 100. (I don't know how to draw the greater-or-equal sign here - it is a horizontal line beneath the greater sign).
It means you manipulate the equation in such a way that "y" is alone to the left of the equal sign, and everything else (including "x") is to the right.