What is the measure of angle acd? 45.0°, 67.5°, 112.5°, 135.0°

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

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 solution of the equation? 35√(x+2)3+3=27