A physical education class has 21 boys and 9 girls. Each day, the teacher randomly selects a team captain. Assume that no studen
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The surface area of a sphere is 
where r is the radius;
The circumference is
so that 
using this value we can evaluate the surface area of 1 ball as:
For 100 ball you get:
The circumference is
For 100 ball you get:
Answer:
Let
Solution:
Step-by-step explanation:
See attached for step-by-step
