jesuslovesusall3
10.10.2019 •
Mathematics
What is the area of a circle whose radius is 10 meters?
a: 20 pi
b: 25 pi
c: 100 pi
d: 400 pi
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Ответ:
10
Step-by-step explanation:
A group of 10 people is choosing a chairperson and vice-chairperson. They put all 10 people's names into a hat. The first name drawn becomes chair. The second name drawn becomes vice-chair. How many possible combinations of chair and vice-chair are there?
19
90
100
10! (10 factorial)
Youre Welcome! :)