6 + 3 (10× - 22) could someone please help me solve this​

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 : )

What is the area of the shaded sector?

The area of each triangle is 7 square units. the surface area of the triangular prism is