If you can answer my riddle I will mark as brainlest ok? RIDDLE: If you give me food I will live but if you give me water I will die. What am I?

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

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

What is the value of x enter your answer in the box (3x+50