The value of a collectible after t years is given by the formula v (t) = 750(0.8)". What is the value of the collectible after 10 years? Round to the nearest cent (hundredths place).

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 : )