Jeff is traveling from atlanta to columbia and then to charleston. he decides to plot the cities on a coordinate plane. he puts atlanta at (0, 0), columbia at (21, 0) and charleston at (24, -11). he lets each tick mark represent 10 miles. which formula would correctly solve for the distance from columbia to charleston? a) √24² + (-11)² b) √24² - 11² c) √3² + (-11)² d) √3² - 11²