To determine which is greater, we can calculate the area of each bubble and compare them.
The formula for the area of a circle is A = πr^2, where A is the area and r is the radius.
For the single bubble with a radius of 7 cm, the area would be:
A = π(7 cm)^2 = 153.94 cm^2
For each of the seven bubbles with a radius of 1 cm, the area would be:
A = π(1 cm)^2 = 3.14 cm^2
The total area of all seven bubbles would be:
Total area = 7 x 3.14 cm^2 = 21.98 cm^2
Comparing the two areas, we can see that the area of the single bubble with a radius of 7 cm is greater than the total area of the seven bubbles with a radius of 1 cm.
Therefore, the area of a bubble with a radius of 7 cm is greater than the total area of seven bubbles, each with a radius of 1 cm.