Can you help me please

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Find the value of x. give reasons to justify your solutions! c ∈ ae

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 : )