Which phrase describes a model in science?

a structure that is always built to be an exact copy of an object
a structure that is used to represent a complex system
several structures that always represent different things
something that is unique and does not imitate an object

Answers

Answer 1

The correct answer is B. A structure that is used to represent a complex system

Explanation:

A scientific model is a structure or set of concepts that aim at representing a natural phenomenon or system. This means a scientific model is not created to be an exact copy of the system but rather to act as a representation, which helps scientists to explain or understand the functions and elements of a system. For example, by creating a model of a specific ecosystem, scientists can better understand the interactions between living organisms in the ecosystem, even though the model is not an exact model of the real ecosystem. According to this, a model in science is "A structure that is used to represent a complex system"

Answer 2

Answer:

B. a structure that is used to represent a complex system

Step-by-step explanation:

just did the quiz on ed


Related Questions

I need a answer for this

Answers

Answer:

I think is A but I could be wrong.....But I don't think so because I did the math lol

Step-by-step explanation:

solve for x
9^x/9^3=9^5​

Answers

Answer:

9^x =9^5.

9^3

cross multiply

9^x=9^5×9^3

the nine cancel themselves .

x=5+3=8.

Answer:

x=8

Step-by-step explanation:

when dividing, you subtract the indicies (powers) and vice versa

rearrange the equation:

9^x=9^5​*9^3

5+3= 8 (add because when multiplying with indicies you need to add the indicies)

check answer:

9^8/9^3=9^5​

8-3=5 ✓

2|x-7|=8 solve the equation​

Answers

Answer:

2x - 7 = 8

2x = 8 + 7

2x = 15 (divide both sides by 2 to get x)

2x/2 = 15/2

x = 7.5

Step-by-step explanation:

Answer:

11, 3

Step-by-step explanation:

Substitute 11

2|11-7|=8

2|4|=8

8=8

Substitute 3

2|3-7|=8

2|-4|=8

2x4=8

8=8

Please help me, extra points !!

Answers

Hey ! I know this says extra points but what do you need help on

Monyne Phillips three coins. What is the probability that the first second and third Cornwall in the same way (either all heads or or tails) SHOW YOUR WORK

Answers

Answer:

1 in 8 chance.

Step-by-step explanation:

When a coin flips is has two outcomes: heads or tails, obviously.

Whenever you have a 50/50 probability, in this case a coin, every time you add another coin the amount of outcomes squares, or multiplies by the number of outcomes, and since we are using a coin, two. To reiterate, say we were using a die, a die is a cube, a six sided shape, so there are six outcomes. The chances of getting all sixes with one die is 1 in 6. Add another die and try to get all sixes, the chances become 1 in 36. We got this by multiplying our out comes by our outcomes

1 coin: 2 outcomes

2 coins: 4 outcomes

3 coins: 8 outcomes

Another thing:

Don't be fooled by questions being specific by saying "all heads" or "all tails"...

This is a wording trick, no matter the outcome, the chances will always be equal.

Good luck :)

Help please! I appreciate all of you people helping me:))

Answers

Answer:

∠ b = 12°

Step-by-step explanation:

Complementary angles sum to 90°, thus

a + b = 90 ← substitute a = 78

78 + b = 90 ( subtract 78 from both sides )

b = 12

That is ∠ b = 12°

Identify the graph of xy=-8 for theta=pi/4 and write and equation of the translated or rotated graph in general form.

Answers

Answer:THE ANSWER IS A

Step-by-step explanation:

CORRECT ON EDGE

Answer:

A

Step-by-step explanation:

edge

Tori's mathematics test had 75 problems: 10 arithmetic, 30 algebra, and 35 geometry problems. Although she answered 70% of the arithmetic, 40% of the algebra, and 60% of the geometry problems correctly, she did not pass the test because she got less than 60% of the problems right. How many more questions would she have needed to answer correctly to earn a 60% passing grade?

Answers

Answer:

She would need 5 more correct answers.

Step-by-step explanation:

This is from the AMC 8 1999 (the question). You can just search up the solution but okay.

70% of 10 is 7 so she got 7 arithmetic questions.

40% of 30 is 12 so she got 12 algebra questions.

60% of 35 is 21 so she got 21 geometry questions.

She got [tex]\frac{7+12+21}{10+30+35} =\frac{40}{75} =\frac{8}{15}[/tex] questions correct.

60% of 75 is 45 questions correct.

She got 40 questions correct.

She needed 5 more correct answers to get 60%.

Answer:

Step-by-step explanation:

problems solved in arithmetic=10×70 %=7

problems solved in algebra=30×40 %=12

problems solved in geometry=35×60 %=21

total problems solved=7+12+21=40

problems required for passing=75×60 %=45

so more questions required for passing=45-40=5

Which type of graphs allows the reader to view the raw data values?
Select one or more:
A Box Plot
B Stem-and-leaf plot
C Dot plot
D Histogram

Answers

Answer:

The correct option is B

B) Stem and Leaf plot

Step-by-step explanation:

The purpose of stem and leaf plot is to show the data distribution while retaining its uniqueness. Stem and leaf plot shows the raw values by retaining the original data. It is usually recommended for batches between 15 and 150 data points.

In Stem and Leaf plot, the leaves are usually the last digit of a data, which stems are the remaining digits. For example if we have 2 number suppose 171 and 176, then in stem and leaf plot, as 17 is common, it can be the stem, while last digits of both numbers i.e 1 and 6 are leaves. It can be written as:

17 |  1   6

Tara's car travels about 25 miles on one gallon of gas. She has between 10 and 12 gallons of
gas in the tank. Identify the independent and dependent quantity in the situation. Find
reasonable domain and range values.
A. number of gallons of gas; distance traveled; 10 to 12 gallons; 100 to 120 miles
B. number of gallons of gas; distance traveled; 10 to 12 gallons; 250 to 300 miles
C. distance traveled; number of gallons of gas; 10 to 12 gallons; 250 to 300 miles
D. distance traveled; number of gallons of gas; 250 to 300 miles; 10 to 12 gallons​

Answers

Answer:

B

Step-by-step explanation:

The independent value is the number of gallons of gas and the dependent value is the distance traveled, because the distance traveled is affected by how much gas is in the tank.

It is also 250 to 300, because 10 and 12 (numbers of how many gallons of gas are in the tank) multiplied by 25 (miles traveled on one can of gas) equals 250 and 300.

The distance traveled; the number of gallons of gas; 250 to 300 miles; 10 to 12 gallons​. Then the correct option is D.

What is Algebra?

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

PEMDAS rule means for the Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to solve the equation in a proper and correct manner.

Tara's car travels about 25 miles on one gallon of gas. She has between 10 and 12 gallons of gas in the tank.

The distance traveled in 10 gallons of gas will be

⇒ 25 x 10

⇒ 250 miles

The distance traveled in 12 gallons of gas will be

⇒ 25 x 12

⇒ 300 miles

The distance traveled; the number of gallons of gas; 250 to 300 miles; 10 to 12 gallons​. Then the correct option is D.

More about the Algebra link is given below.

https://brainly.com/question/953809

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ram is half his fathers age now. ten years ago he was one third his fathers age then what are their present ages

Answers

x   -  Ram's age now

Ram is half his father's age now, so his father's age is two times Ram's age:

2x  - Ram's father age now

x - 10   -  Ram's age ten years ago

2x - 10    - Ram's father age ten years ago

ten years ago he was one third his father's age so his father's age was three times Ram's age:

2x - 10 = 3•(x - 10)

2x - 10 = 3x - 30

-10 + 30 = 3x - 2x

20 = x

2x = 2•20 = 40

Answer:

Ram is 20 years old now, Ram's father is 40 years old now.

Which of the following is a counter example for the given conjecture?

Conjecture: All student have school pride.

A. Jose goes to school every day.
B. Jessica studies and is attentive in class.
C. Joanna always wears her school colors and attend all school events she possibly can.
D. John does not wear his school colors and does not attend any school event

Please answer this

Answers

Answer:

Hey mate, here is your answer. Hope it helps you.

Step-by-step explanation:

D- John does not wear his school colors and does not attend any school event.

Description in mathematics, a conjecture is a conclusion or a proposition which is suspected to be true due to preliminary supporting evidence, but for which no proof or disproof has yet been found.

The counter-example for the given conjecture is "John does not wear his school colours and does not attend any school event". Therefore, option D is the correct answer.

The given conjecture is "All students have school pride."

We need to identify a counter-example for the given conjecture.

What is a conjecture?

In mathematics, a conjecture is a conclusion or a proposition that is proffered on a tentative basis without proof. Some conjectures, such as the Riemann hypothesis or Fermat's Last Theorem, have shaped much of mathematical history as new areas of mathematics are developed in order to prove them.

Now, "All students have school pride" is not true, because not all students have school pride.

The counter-example for this conjecture is "John does not wear his school colours and does not attend any school event"

Therefore, option D is the correct answer.

To learn more about the conjecture visit:

https://brainly.com/question/24881803.

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find the greatest common factor (3x^4y^2+12x^2y^3+6x^3y4)

Answers

Answer:

3x^2y^2

Step-by-step explanation:

the gcf is 3x^2y^2 since it is the common factor in all of the terms

This sphere has a diameter of 5 m. What is the volume of the sphere?

Answers

Answer:

65.46 meters cubed

Step-by-step explanation:

Answer: the answer is V= 125/6πm^3

Step-by-step explanation: edge 2021


15. The set of ordered pairs represents a function.
{(1,3), (2, 9), (k, 12), (5,9), (8,0)}
Which of these could be the value of k?
A. 0
B. 1
C. 5
D. 8

Answers

Answer:

A. 0

Step-by-step explanation:

In a function, all x-coordinates must be different.

The given function already shows 1, 2, 5, and 8 as x-coordinates, so you must choose a number other than those.

Answer: 0

The correct option will be Option A : the value of k will be 0.

What is a function?

The function is a relation between two sets where one set is called the domain and another set is the codomain which is one one or many one relations.

If the x or input values are different then the relation will become a function.

So we can say if the x values are repeated and their corresponding y or output values are the same, then also the relation becomes a function.

If the x values are repeated and their corresponding y or output values are different, then the relation will not become a function.

Given the ordered pairs are {(1,3), (2, 9), (k, 12), (5,9), (8,0)

As we know the x value is repeated and the y value is different then the relation will not be a function.

So here in the given ordered pair, there is no any second 12. So k value should not be equal to 1,2,5,8 otherwise it will not be a function.

By checking all the options

0 is not present in x value of the given ordered pair.

Therefore the correct option will be Option A : the value of k will be 0.

Learn more about function

here: https://brainly.com/question/6561461

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(25 pts) Between which consecutive years was the decrease in the price of gold per ounce the greatest?

1975-76
1973-74
1972-73
1974-75

Answers

Answer:

1975-76

Step-by-step explanation:

On this chart, the price of gold per ounce rises almost continuously, until it suddenly drops from the years 1975 to 76 by a margin of about 40 dollars. Therefore, this these are the years with the most decrease. Hope this helps!

1975-76 is the correct answer

A student at a university makes money by buying and selling used cars. Charles bought a used car and later sold it for a 20​% profit. If he sold it for ​$4560​, how much did Charles pay for the​ car? Charles paid ​$? for the car.

Answers

Answer:

He paid $3648

Step-by-step explanation:

If you subtract 20% from 4560 which he sold it for you will get how much he paid for it.

4560 - 20% = $3648

The ratio of the lengths of corresponding parts in two similar solids is 4:1.
What is the ratio of their surface areas?
A. 16:1
B. 8:1
C. 4:1
D 641

Answers

Answer:

the ratio is 16:1

Step-by-step explanation:

surface area is measured in square units, so you should square both numbers in the linear ratio to get the ratio for the surface area.

[tex]4^{2} : 1^{2} -->16:1[/tex]

Answer:

A.16:1

Step-by-step explanation:

One polygon has a side of length 2 feet. A similar polygon has a corresponding side of length 4 feet. The ratio of the
perimeter of the smaller polygon to the larger is 2/1 or 1/2 or 1/4

Answers

The answer to your question is 2/1

HELP WILL DO ANYTHING TO GET ANSWERS

Answers

Answer:

24. 40 minutes approximately

25. 8 days

Step-by-step explanation:

24. 40 minutes

Anna: 1 hour

Peter: 3 hours

Maria: 6 hours

A way to solve this kind of question is to think about how much they can perform given the same amount of time.

Anna: 1 hour x 6: 6 hours (In 6 hours Anna can clean 6 houses)

Peter: 3 hours x 2  6 hours (In 6 hours Peter can clean 2 houses)

Maria: 6 hours x 1: 6 hours (In 6 hours Peter can clean 1 house)

Working together they can clean the house 9 times faster.

It is 0.66 hours, or approximately 40 minutes

25. 8 days

It climbs 3 feet up but then it falls 2 feet down while sleeping during

the night. So the snail actually climbs 1 foot every day. It happens in the first 7 days. On the 8th day it goes out before sleep.  

Can anyone help me out please

Answers

Answer:

5/23

Step-by-step explanation:

if you turn "3 8/5" into a mixed number you would get 23/5 then you would flip the numbers to get 5/23

Hope this helps!!! :)

Mira is applying for a mortgage, and the bank wants to know how much she makes per year. She's paid $25 an hour and
works 30 hours a week. She needs to calculate how much she makes per year.
Select the correct answer from the drop-down menu.
Mira's annual income, assuming 52 weeks per year, is $
A- 9,000
B-22,500
C-39,000

Answers

Answer:

39,000

Step-by-step explanation:

$25x30=$750

$750x52=$39000

What is the surface area of a cylinder with base redius 2 and height 9

Answers

Answer:

[tex]138.23units^2[/tex]

Step-by-step explanation:

[tex]A=2\pi rh+2\pi r^2=2*\pi *2*9+2*\pi *2^2=138.23008\\138.23units^2[/tex]

Answer:

44pi

Step-by-step explanation:

Look at the attachment

Please help me!!! :(

Answers

Answer:

280

Step-by-step explanation:

7*5*4*2=280

ANSWER ALL PLS NOW I NEED THIS ANSWERED

Answers

1. 6^2

2. -5^4

3. 3^3

4. -4^3

5. a^3

6. 1/2^6

7. Base is -12 expanded is -12x-12 exponent is 2 standard form is 144

8. Base is 1/2 and expanded is 1/2x1/2x1/2 exponent is 3 standard form is 1/8

9. Base is -9 expanded is -9x-9x-9 exponent is 3 and standard form is -729

10. 8x8x8x8

11. -3x-3

12. 8x8

13. -7x-7x-7x-7x-7

14. 7x7x7

15. 3/4x3/4x3/4x3/4x3/4

1) [tex]6^{2}[/tex]

2) [tex]-5^{4}[/tex]

3) [tex]3^{3}[/tex]

4)[tex]-4^{3}[/tex]

5)[tex]a^{3}[/tex]

6)[tex]2^{6}[/tex]

7) Base= -12 Exponent=2 Expanded= (-12)(-12) Standard Form= -144

8) Base= [tex]\frac{1}{2}[/tex] Exponent= 3 Expanded= ([tex]\frac{1}{2}[/tex])([tex]\frac{1}{2}[/tex])([tex]\frac{1}{2}[/tex]) Standard Form = [tex]\frac{1}{8}[/tex]

9) Base= -9 Exponent= 3 Expanded= (-9)(-9)(-9) Standard Form= -729

10) (8)(8)(8)(8)

11) (-3)(-3)

12) (8)8)

13)(-7)(-7)(-7)(-7)(-7)

14) (7)(7)(7)

15) ([tex]\frac{3}{4}[/tex])([tex]\frac{3}{4}[/tex])([tex]\frac{3}{4}[/tex])([tex]\frac{3}{4}[/tex])([tex]\frac{3}{4}[/tex])



Maya can run 18 miles in 3 hours, and she can bike 18 miles in 2 hours.




When Maya biked for 3 hours and then ran for 1 hour and 30 minutes, what was her average speed?

Answers

Answer:

6mph

Step-by-step explanation:

Speed = distance/time

so you would do 18/3 and you would get 6

can u pls help me with this thanks

Answers

Hey!!!

<a and <b are complementary angles.

Those angles which are exactly 90 degree are called complementary angles.

hope it helps..

A textbook store sold a combined total of 368 psychology and sociology textbooks in a week. The number of psychology textbooks sold was three times the
number of sociology textbooks sold. How many textbooks of each type were sold?
Number of psychology textbooks sold: 1
Number of sociology textbooks sold:

Answers

Step-by-step explanation:

Total books = 368.

Sociology books = 92.

Psychology books = 3 times sociology books

= 3 x 92 = 276

Total = 276 + 92 = 368

Which set a rational numbers are ordered from least to greatest?

Wrong answers will be reported!!!!

Answers

Answer:

The answer to this is A

Step-by-step explanation:

hope it helped

Answer:

A

Step-by-step explanation:

tell me if im right

A digital scale measures weight to the nearest 0.2 pound. Which
measurement shows an appropriate level of precision for the scale?

A.130.4 pounds
B.124.75 pounds
C.125 pounds
D.120 pounds

Answers

Answer:

A

Step-by-step explanation:

This option contains a number that would appear on this scale.

Answer:130.4

Step-by-step explanation:

have good day

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2|x-7|=8 solve the equation 2xsquare-6x+3=0 by completing square method How are scales and chords notated differently in TAB? What volume of 10,0 M H2SO4 is required to prepare 4.0 L of 0.50 M H2SO4?A) 0.20 LB) 0.40 LC) 0.50 LD) 1.0LE) 4.0L Please help me HURRY!!!!!! Sally makes deposits into a retirement account every year from the age of 30 until she retires at age 65. a) If Sally deposits $ 1100$1100 per year and the account earns interest at a rate of 9 %9% per year, compounded annually, how much does she have in the account when she retires? b) How much of that total amount is from Sally's deposits? How much is interest? que se necesita para que una magnitud vectorial est completamente definida ? 15. The set of ordered pairs represents a function.{(1,3), (2, 9), (k, 12), (5,9), (8,0)}Which of these could be the value of k?A. 0B. 1C. 5D. 8 Four men are to divide K500 equally among them. When the money was given, 20% was taken away.How much each did the four men receive? The May transactions of Concord Corporation were as follows. May 4 Paid $860 due for supplies previously purchased on account. 7 Performed advisory services on account for $7,490. 8 Purchased supplies for $840 on account. 9 Purchased equipment for $1,940 in cash. 17 Paid employees $500 in cash. 22 Received bill for equipment repairs of $810. 29 Paid $1,190 for 12 months of insurance policy. Coverage begins June 1. Journalize the transactions Which of the following statements is true? In market equilibrium:a. There are uncomsummated wealth destroying transactionsb. There are unconsummated value creating transactionsc. None of thesed. There are no unconsummated wealth creating transactins The way a rock reflects light is called the rock'sA. streakO B. lusterO C. cleavageD. specific gravity 2. Which is the nearest star? Could someone help me with this trigonometry question where you have find the x which is the adjacent. the reference angle is 39 degree and the opposide side is 30 cm. Sam is eating a Big Hamburger. The first bite was 20% of the Hamburger, the second bite was 20% of what is left and so every next bite is 20% of what is left. How much did the Hamburger weigh originally, if after the second bite there was 160g of it left? Tara's car travels about 25 miles on one gallon of gas. She has between 10 and 12 gallons ofgas in the tank. Identify the independent and dependent quantity in the situation. Findreasonable domain and range values.A. number of gallons of gas; distance traveled; 10 to 12 gallons; 100 to 120 milesB. number of gallons of gas; distance traveled; 10 to 12 gallons; 250 to 300 milesC. distance traveled; number of gallons of gas; 10 to 12 gallons; 250 to 300 milesD. distance traveled; number of gallons of gas; 250 to 300 miles; 10 to 12 gallons what type of animal is a girrafe? What does Ohms law state?A. Current equal voltage time resistanceB. Voltage equals resistance divided by currentC. Voltage equals current divided by resistanceD. Voltage equals current time resistance Which of the following is a counter example for the given conjecture?Conjecture: All student have school pride.A. Jose goes to school every day.B. Jessica studies and is attentive in class.C. Joanna always wears her school colors and attend all school events she possibly can.D. John does not wear his school colors and does not attend any school event Please answer this VERY EASY QUESTION. WILL MARK BRAINLIEST The Ring of Fire is a string of volcanic sites in the Pacific Ocean that stretches between the Americas, Asia, and Australia. What is the most likely cause of this volcanic activity? The Earths core pushes through tectonic plates here There is a high number of convergent tectonic plate boundaries The melting of tectonic plates by particularly hot parts of the Earth's crust The explosion of energy as a result of a collision between two nearby tectonic plates