Seraphina is driving two hours to visit her family. for the first hour, she traveled at a speed of 56 miles per hour. then, in the second hour, she traveled at a speed of 71 miles per hour. what is the percentage increase of seraphina's speed? if necessary, round to the nearest tenth of a percent.

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?