Answer:
8
Step-by-step explanation:
radius is half the diamiter
Answer:
2/14
Step-by-step explanation:
i tried my best
Answer:
90 different ways
Step-by-step explanation:
We have a total of 10 members, and we want to find how many groups of 2 members we can have, where the order of each member in the group of 2 is important, so we have a permutation problem.
To solve this problem, we need to calculate a permutation of 10 choose 2.
The formula for a permutation of n choose p is:

So we have:



So there are 90 different ways of choosing a president and a vice-president.
10(x-5)=-80
10x-50=-80
+50 +50
10x=-30
/10 /10
x=-3