I need help with this

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Determine the domain and range of the given function. the domain is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}. the range is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}.

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units