Final answer:
Camila can iron 40 shirts per hour, Evelyn can iron 20 shirts per hour. If Camila worked 6 hours and Evelyn worked 9 hours, the total shirts ironed between the two workers would be 420 shirts.
Step-by-step explanation:
To find the total number of shirts ironed between Camila and Evelyn, we need to calculate the number of shirts each person can iron in their respective hours and then add them together.
Camila can iron 40 shirts per hour, so in 6 hours she can iron 6 * 40 = 240 shirts.
Evelyn can iron 20 shirts per hour, so in 9 hours she can iron 9 * 20 = 180 shirts.
To find the total, we add the number of shirts Camila and Evelyn can iron: 240 + 180 = 420 shirts.