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Sati [7]
3 years ago
8

You are taking a multiple-choice test that has eight questions. each of the questions has three answer choices, with one correct

answer per question. if you select one of these three choices for each question and leave nothing blank, in how many ways can you answer the question?
Mathematics
1 answer:
sukhopar [10]3 years ago
5 0
Alright, so there are three answers. Start with 3, and for each question you answer, you can select three more, so it's 3*3 for two questions and so on, resulting in 3^8= 6561

This is assuming you mean <span>how many ways can you answer the test, not the question</span>
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Answer:

The distance between the two boats after 2.5 hours is 57 m.

Step-by-step explanation:

The distance covered by each boat after 2.5 hours are:

speed = \frac{distance}{time}

distance = speed x time

For boat A, speed = 14 km/h and time = 2.5 hrs.

So that,

distance = 14 x 2.5

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For boat B, speed = 18 km/h and time = 2.5 hrs.

So that,

distance = 18 x 2.5

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The distance between the two boats after travelling 2.5 hours can be determined by applying the cosine rule. Let the distance be represented by x, so that:

a^{2} = b^{2} + c^{2} - 2bc Cos A

x^{2} = 45^{2} + 35^{2} - 2(45 x 35) Cos 90^{o}

   = 2025 + 1225 - 3150 (0)

   = 3250

x = \sqrt{3250}

  = 57.0088

x = 57.0 m

The distance between the two boats after 2.5 hours is 57 m.

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3 years ago
The proceeds from a saturday car wash are directly proportional to the number of cars washed. the total after 7 cars is $140. ho
maks197457 [2]
140/7=20. Which means they charge $20 per car.
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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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