Im finally at Sasuke's and Naruto's Power o((>ω< ))o.

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Find the solution of each of the following.

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 : )