6 cm
4 cm
9.5 cm
4 cm
6.5 cm
I need help I have to find the perimeter for this

Given this information, which expression must represent the value of b?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

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 : )