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bekas [8.4K]
3 years ago
10

Combinatorics problem. A web site was hit 300 times over a period of 15 days Show that over some period of 3 consecutive days, i

t was hit at least 60 times.
Mathematics
1 answer:
crimeas [40]3 years ago
6 0

Answer:

There is a period of 3 consecutive days in which the website was hits at least 60 times.

Step-by-step explanation:

A web site was hit 300 times over a period of 15 days.

To solve this question we will use the Pigeonhole Principle.

Here, n = 300 and k = 5

We will find \frac{n}{k} to get that there is a hole with at least \frac{300}{5}=60 pigeons.

Hence, there is a period of 3 consecutive days in which the website was hits at least 60 times.

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Answer:

A = (-1,5) or  (-1,-3)

Step-by-step explanation:

A = (-1,y)    B = (2,1)

 

(Distance from A to B) = √[(-1-2)² + (y-1)²] = 5

                                    =√[9 + y² - 2y + 1] = 5

Squaring on both sides

                                     =  y² - 2y + 10 = 25

                                       =y² - 2y -15 = 0

                                      = (y-5)(y+3) = 0

                                         y = 5 or -3

Therefore, A = (-1,5) or  (-1,-3)

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4 years ago
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A plane flies at a steady rate of 40 mph while a second plane flies at a steady rate of 100 mph. The planes are 200 miles apart
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Answer:

1\ \text{hour}\ 25\ \text{minutes and }12\ \text{seconds}

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They will meet in 1\ \text{hour}\ 25\ \text{minutes and }12\ \text{seconds}.

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