If you have three friends, how many ways can you introduce them to someone?
2 answers:
Answer: 6
Step-by-step explanation:
Given : The number of friends : 3
If we introduce one by one , then the number of ways to introduce them is given by permutations .
We can choose first friend in 3 ways , second in 2 and the third in one way.
Then , the number of ways of introducing 3 friends one at a time is given by :-
Therefore, the number of ways of introducing 3 friends = 6
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Answer:
Francine run 5.495 miles
Step-by-step explanation:
Given :
Francine ran laps around the circular track in the school gym.
The track has a diameter of 1/2 miles.
To Find : About how far does Francine run?
Solution :
First we need to calculate the perimeter of circular track :
Perimeter of circle :
Since we are given the diameter = 1/2 miles = 0.5 miles
So, Radius will be (Diameter/2) = 0.5/2 = 0.25 miles
So, The perimeter will be:
Since
⇒
⇒
Thus the circular track is of 1.57 miles .
Since she ran = 7/2=3.5 laps
1 lap = 1.57 miles
So, 3.5 laps = 1.57*3.5 =5.495 miles .
Hence , Francine run 5.495 miles