Which point represents the vertex of the marked angle?

a
b
c
d
e

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

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 : )

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4