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3 years ago

This one as well please

Mathematics

1 answer:

marissa [1.9K]3 years ago

7 0

Answer:

1/11

Step-by-step explanation:

If there are 11 counters and there's only 1 white one, that makes it to where there's only a 1 in 11 chance of you choosing that one white counter.

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Based on this topic sentence, which text structure will be used to write the rest of the paragraph?

USPshnik [31]

Answer:

Look for unstated cause-and-effect relationships

In some paragraphs, the cause-and-effect relationship is not directly stated. In these cases, you will have to “read between the lines” to find the cause-and-effect relationship. Use clues from the paragraph to identify a cause-and-effect relationship.

To find the effect, ask yourself: “What happened?”

To find the cause, ask yourself: “Why did it happen?”

Let’s look at some examples:

The Great Barrier Reef is threatened by global warming; the rising water temperature causes reef bleaching, making the reef less colorful and more prone to disease.

Reef bleaching is the effect; global warming and rising temperatures are the cause.

I tried my hand at all of the ball sports you can imagine, including lacrosse, basketball, soccer, and softball, which is why I found myself on the track during 9th-grade tryouts.

In this example, the cause is implied (being bad at team sports), and the effect, or result, is trying out for track and field.

Step 2: Look for the signal words that show cause-and-effect relationships.

Step 3: Look for effects that are also causes. Effects can form a chain in which one effect goes on to cause a second effect, which may then cause a third effect and so on. Study this example:

When people cut down trees to clear land, they destroy the habitats of birds. This reduces the number of nest sites. As a result, fewer baby birds are hatched, and the bird population declines.

Cause 1: People cut down trees.

Effect 1: The habitats of birds are destroyed.

Effect 2: The number of nest sites is reduced.

Effect 3: Fewer baby birds are hatched.

Effect 4: The bird population declines.

7 0

3 years ago

A calculus student takes a 20-question, multiple choice test with 5 answer choices for each question. find the mean and standard

mario62 [17]

Suppose the student guesses the answers, we shall consider this a binomial probability problem of success. This implies that getting a question right is p=1/5.
The number of questions is n=20 questions.
The mean of binomial distribution is
mean=n*p= 20*1/5=4

b] The standard deviation of a binomial distribution is given by:
σ=√(n*p*(1-p))
=√(20*0.2*0.8)
=1.79~1.8

Answer:
μ=4 ; σ=1.8

4 0

4 years ago

What is 13 more than 3 times a number is 34 and what is the solution

NARA [144]

Answer:

13 + 3x = 34

Variables:

x = random number

6 0

3 years ago

A study shows that employees who begin their workday at 9:00 a.m. vary their times of arrival uniformly from 8:40 a.m. to 9:30 a

arlik [135]

Answer:

20 %

Step-by-step explanation:

This question can be easily solved using The Rectangular, or Uniform Distribution of Probability

The probability of people arriving between 8:40 am and 9:30 am is uniformly distributed and can be represented by a rectangle attached as figure 1 .

The total area of this green rectangle must be equal to 1 because the total probability is always equal to 1.

We are interested in finding the red region which is for the time range of 9:00 am to 9:10am shown in the figure 2 attached:

First we need to find the Height of this rectangle:

To find the value of Height:

The formula for the area of rectangle = Base x Height

Base = b – a

In our case b – a is the difference in time from 8:40 am to 9:30 am

So, b – a = 50 (mins)

Similarly, Height x Base = 1 because max probability is equal to 1

Height = 1/ (b – a) because Base x Height must be equal to 1 (max probability)

Height = 1/ (b – a )

Height = 1/(Base)

Height = 1/50

Now once we have the value of Height we can find the desired probability of any region by multiplying the Height with the given time range in the question. In our case the time range is 9:00 am to 9:10 am which means 10(mins). Therefore,

Probability = Height x 10

Probability = 1/50 x 10

Probability = 1/5

To convert it into percentage

1/5 x 100% = 20% (Answer)

3 0

3 years ago

Point C is located 8 inches from Point A and 6 inches from Point B. Points A and B are 2 inches apart. which statement is true?

jek_recluse [69]

I think Point A and B are 2 inches apart or all of them is right

5 0

4 years ago