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Leni [432]
3 years ago
11

It takes 12 hours for a single hose to fill a large vat. When a second hose is added, the vat can be filled in 4 hours.

Mathematics
2 answers:
sveticcg [70]3 years ago
8 0
The answer is 3 because you divide 12 and 4
aliina [53]3 years ago
4 0

Its 6 hours.

I should probably explain it, the reason for this is mainly just by dividing the fact that adding the other hose takes away 8 hours of work we can deduce that the amount of water it can put out can do it 2 times faster than the normal hose so the answer is 6

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Kayla and Josh are watching marathons of their favorite TV show. Episodes of Kayla's show are 120 minutes long, while episodes o
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Answer:

  1080 minutes

Step-by-step explanation:

The greatest common factor (GCF) of the two times is 15 minutes, so their least common multiple is (120×135)/15 = 1080 minutes.

In that time, Kayla will have watched 9 shows, and Josh will have watched 8.

It will be 1080 minutes before they start again at the same time.

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3 years ago
What is the ratio of 1.5 inch screws to 2.5 inch screws?
Ugo [173]

Step-by-step explanation:

1.5 : 2.5

= 1.5/2.5

15/25

3/5

the ratio is 3 : 5

4 0
3 years ago
Last Friday Bill had $22. Over the weekend he recieved some money for washing the dog. He now has $41. How much money did he rec
mariarad [96]

Answer:

He received  19 dollars

Step-by-step explanation:

On Friday he had $22 and now he has $41.

We will need to do the reverse operation of addition, and that will be subtraction.

$41 - $22 = $19

5 0
3 years ago
A multiple-choice test contains 25 questions, each with 4 answers. Assume a student just guesses on each question. (a) What is t
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Answer:

9.68*10^-10

Step-by-step explanation:

The problem above can be solved using the binomial probability relation :

Where ;

P(x = x) = nCx * p^x * q^(n-x)

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p = 1/4 = 0.25

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P(x > 20) = p(x = 21) + p(x = 22) +.. + p(x = 25)

Using the binomial probability calculator to save computation time :

P(x > 20) = 9.68*10^-10

6 0
3 years ago
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