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sertanlavr [38]
2 years ago
13

A researcher would like to evaluate the claim that drinking large quantities of 1.3 water can help prevent the common cold. One

group of participants drinks 8 glasses of water every day, and a second group drinks 2 glasses of water every day. The researcher records the number of colds each individual experiences during the 4-month winter season.
Mathematics
1 answer:
krok68 [10]2 years ago
5 0

The independent variable is the quantity of water and the dependent variable is whether or not a person catches common cold.

<h3>What is an experiment?</h3>

An experiment is the process by which we are able to establish a cause and effect relationship. An experiment must have a dependent variable and an independent variable.

The independent variable is the variable that is being changed in an experiment. As the independent variable is changed, the dependent variable also changes.

In this experiment, the independent variable is the quantity of water and the dependent variable is whether or not a person catches common cold.

Learn more about independent variable:brainly.com/question/1479694

#SPJ1

Missing parts;

A researcher would like to evaluate the claim that drinking large quantities of water can help prevent the common cold. One group of participants drinks 8 glasses of water every day, and a second group drinks 2 glasses of water every day. The researcher records the number of colds each individual experiences during the 4-month winter season. . Identify the dependent variable for this study

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What is the net force being applied to the box?
Marysya12 [62]

Answer:

net force is the force used to push or pull the box

Step-by-step explanation:

for example-

==> 15N   BOX   12N <==

15-12=3

3N

if they point the same way add if they point the opposite subtract

7 0
4 years ago
Manny observed a Northern Gannet, a deep diving seabird, hovering at a height of 10 meters above the ocean surface. The bird the
mr Goodwill [35]

Answer:

9.2 seconds.

Step-by-step explanation:

We have been given an equation that represents dive of a bird as y=x^2-10.3x+10, where x represents the time the dive lasted in seconds and y represents the height of the bird in meters.

We can see that our given equation is a parabola. The leading coefficient is positive, so our parabola will be an upward opening parabola.

Upon graphing our given equation, we will get our required graph as shown in the attachment.

As x represents the time the dive lasted in seconds and y represents the height of the bird in meters, so the bird will be at the surface when the graph will cross x-axis.

We can see that graph crosses x-axis at x=1.085\text{ and }x=9.215.

Upon rounding to nearest tenth, we will get:

x\approx 1.1\text{ and }x=9.2.

At x\approx 1.1 the bird dives in water and goes down the water surface and at x=9.2 the bird comes to the surface, therefore, the bird will be at surface after 9.2 seconds.

8 0
3 years ago
Read 2 more answers
Richard and Teo have a combined age of 20. Richard is 2 years older than twice Teo’s age. How old are Richard and Teo?
boyakko [2]

Richard is 14 years old and Teo is 6 years old.

Step-by-step explanation:

Let,

Richard's age = x

Teo's age = y

Combined age = 20 years

According to given statement;

x+y=20    Eqn 1

x = 2y+2  Eqn 2

Putting value of x from Eqn 2 in Eqn 1

(2y+2)+y=20\\2y+2+y=20\\3y=20-2\\3y=18

Dividing both sides by 3

\frac{3y}{3}=\frac{18}{3}\\y=6

Putting y=6 in Eqn 2

x=2(6)+2\\x=12+2\\x=14

Richard is 14 years old and Teo is 6 years old.

Keywords: linear equation, substitution method

Learn more about substitution method at:

  • brainly.com/question/3950386
  • brainly.com/question/4021035

#LearnwithBrainly

5 0
3 years ago
Jerome has 1/4 of the groups video games at his house. Mario has 2/5 of the groups video games at his house. What fraction of th
romanna [79]
13/20 of the group's video games are at Jerome or Mario's house.

Jerome has 1/4 of the group's video games.
Mario has 2/5 of the group's video games.

The question asks what fraction of the video games are at either of their houses. Therefore, we need to add the fractions together to find out the total fraction of the video games at both of their houses.

1/4  +  2/5
We can't add these together because they have different denominators. We'll need to find the least common denominator of 4 and 5 before we can add them. If you can't think of a number that the two denominators can both multiply to get, an easy way to find the common denominator is to multiply the numbers together.

4 x 5 = 20
Therefore, our common denominator is 20. Now, we need to convert the fractions so that they can have a denominator of 20.

1/4 = ?/20
In order to find the numerator, ask yourself what we multiplied the denominator by to get the new denominator. In this case, we multiplied 4 by 5 to get 20. Therefore, we need to multiply 1 by 5 to get an equal fraction.

1 x 5 = 5
1/4 = 5/20  
Our fraction is 5/20.

2/5 = ?/20
Now, let's do the same thing with the other fraction. In this case, we multiplied 5 by 4 to get 20, so we need to multiply 2 by 4 to get an equal fraction.

2 x 4 = 8
2/5 = 8/20
Our fraction is 8/20.

Now that the fractions both have the same denominator, we can add them together easily.

5 + 8 = 13
5/20 + 8/20 = 13/20
Add the numerators together to get the final answer.

Therefore, 13/20 of the group's video games are either at Jerome or Mario's house.

Hope this helps!
5 0
3 years ago
What is 0.46 as a fraction in simplest form, a fraction of 100, and a percent​
goldfiish [28.3K]

Answer:

46/100

23/50

46%

3 0
4 years ago
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