Final answer:
The total area of five coasters is approximately 192.4 square centimeters.
Step-by-step explanation:
The diameter of a coaster is 7 centimeters, so the radius is half of the diameter, which is 3.5 centimeters. To find the area of a circle, you use the formula A = πr², where A is the area and r is the radius.
Therefore, the area of one coaster is approximately 38.48 square centimeters. To find the total area of five coasters, you multiply the area of one coaster by 5.
Therefore, the total area of five coasters is approximately 192.4 square centimeters.