<h2>
Length of track is 168 meter</h2>
Step-by-step explanation:
Let l be the length of track.
Running speed = 4 m/s
Jogging speed = 2 m/s
Total time taken = 2 minutes 6 seconds. = 126 seconds
That is

Length of track is 168 meter
p(not A)=0.18
p(A&B)= 0.44
A= 0.44- 0.18
= 0.26
P(B given A)= 0.26+0.18+0.44
=0.7
Answer:
60 ÷ 20 = the answer is 3 ok I know here the answer was it helpful please rate it can u fund me a question about invited or dared to fight against-________ please tell me if u know the answer
Answer:

Step-by-step explanation:
The given system of equations is

and

The augmented matrix is
![\left[\begin{array}{ccc}2&4&|8\\6&3&|-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%264%26%7C8%5C%5C6%263%26%7C-3%5Cend%7Barray%7D%5Cright%5D)

![\left[\begin{array}{ccc}1&2&|4\\6&3&|-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%26%7C4%5C%5C6%263%26%7C-3%5Cend%7Barray%7D%5Cright%5D)

![\left[\begin{array}{ccc}1&2&|4\\0&-9&|-27\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%26%7C4%5C%5C0%26-9%26%7C-27%5Cend%7Barray%7D%5Cright%5D)

![\left[\begin{array}{ccc}1&2&|4\\0&1&|3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%26%7C4%5C%5C0%261%26%7C3%5Cend%7Barray%7D%5Cright%5D)

![\left[\begin{array}{ccc}1&0&|-2\\0&1&|3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%26%7C-2%5C%5C0%261%26%7C3%5Cend%7Barray%7D%5Cright%5D)
Hence 
The given sum for n = 1 to n = 15 is equal to 255, so the correct option is B.
<h3>
How to find the sum of the given series?</h3>
We want to find the sum of the series whose elements are of the form:
(2n + 1)
From n = 1 to n = 15.
Then our sum will be:
(2*1 + 1) + (2*2 + 1) + ... + (2*15 + 1).
3 + 5 + ... + 31
This is the sum of all odd numbers in the interval [3, 31]
Which gives:

So the correct option is B.
If you want to learn more about sums:
brainly.com/question/24295771
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