The scale of a map is 1:1000000. what are the real distances between two points if the distance between them on this map is 1cm Answer it in km

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?