Land elevations

Question

The land elevations in Nevada fall from the 13,143-foot height of Boundary Peak tot he Colorado River at 470 feet. To the nearest tenth, what is the range of these elevations in miles?

Answer 1

subtract 470 from 13,143 to find the range in feet,

then divide the difference by 5,280 because there are 5,280 feet in one mile. Round to the nearest 1/10 of a mile.