Seraphina is driving two hours to visit her family. for the first hour, she traveled at a speed of 59 miles per hour. then, in the second hour, she traveled at a speed of 72 miles per hour. what is the percentage increase of seraphina's speed? if necessary, round to the nearest tenth of a percent.

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality