Plz help and if you don't answer correctly i will report

In the rectangle below ac=30 units what is de

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Which numbers have the same absolute value? choose all that apply. asap will mark at brainliest