A student observes a difference in the activity level of fish at a pet store. The fish in an aquarium near the window are swimming around more quickly tha the fish in an aquarium placed in the back of the store. The student forms a hypothesis about the effect of sunlight on fish activity levels and arranges to conduct an experiment. Which variable could be an independent variable in the student's experiment? types of fish sold speed of swimming fish amount of time fish were active temperature of water in fish tank​

Answers

Answer 1

Answer: Types of fish sold

Answer 2

The type of fish sold is the independent variable in the student's experiment. So, the correct option is (A).

What are Variables?

A variable is any kind of characteristic, number, or quantity which can be measured or counted. It can also be called a data item. Examples of variables are age, sex, occupation income and expenses, country of birth, capital expenditure, class grade, eye color, and vehicle type.

There are two types of Variables are:

1. Dependent variable

A dependent variable is a type of variable which changes as the result of independent variable manipulation which is the outcome interested in measuring, and it "depends on" the independent variable.

2. Independent variable

An independent variable is the type of variable which is manipulated or varied in an experimental study in order to detect its effects. This is "independent" because it is not affected by any other variable in the study.

In above case, this is independent because types of fish characteristic is not dependent for the experiment.

Thus, the type of fish sold is the independent variable in the student's experiment. So, the correct option is (A).

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Related Questions

HELPPPPPPPPPPPPPPPPPPPPPPPP

Which of the following expressions is a common factor when the expressions x2 – 9 and x2 – 5x + 6 are factored?

A.
x + 3

B.
x2

C.
x – 3

D.
x – 2

Answers

i believe the answer is C, x-3.

52,428 divided by 34

Answers

1542..................

Answer:

1542

Step-by-step explanation:

use, or to compare the following numbers. -2 or 12 <>

Answers

Answer:

-2 < 12

Step-by-step explanation:

12 is bigger than -2.

Arian has 780 in a savings account that earns 2.5% simple interest annually. How much money will be in her account if she does not make any deposits or withdrawals in 2 years?

Answers

Answer:

819

Step-by-step explanation:

We solve the above question using simple interest

The formula for the total amount in a bank amount when it earn simple interest annually is:

A = P(1 + rt)

When

P = Initial amount in the account = 780

r = Simple Interest rate = 2.5% = 0.025

t = 2 years

A = 780(1 + 0.025 × 2)

A = 780(1 + 0.050)

A = 780(1 .050)

A = 819.00

The amount of money that will be in her account if she does not make any deposits or withdrawals in 2 years is 819.

What is the range of the cluster in the scatter plot?

A: Between 4 and 8 years of experience
B: Between 6 and 12 years of experience
C: Between $10,000 and $60,000
D: Between $40,000 and $60,000

Answers

Answer:

b

Step-by-step explanation:

answer :


b


hope this helped

What is an equation in slope-intercept form for the line that passes through the points (1, -3) and (3, 1)?

A. y= 3x + 1
B. y= x-3
C. y= 2x + 5
D. y= 2x-5


° ♡ ₒ ♡ °
thank you!

Answers

D.y=2x-5


I think, i hope this helps
The slope intercept form is y= 2x-5

Can you please mark BRAINLEST

What is the solution for x in the equation?

29 + 15x = -x − 3

A. x= 1/2

B. x= -1/2

C. x= 2

D. x= -2

Answers

Answer:

x=-2

Step-by-step explanation:

Solve the inequality and enter your solution as an inequality comparing a variable to a number x+9>13

Answers

Answer:

x>4

Step-by-step explanation:

Step 1: Subtract 9 from both sides.

x+9−9>13−9

x>4

(2x - 9) (x + 4) = 0
What the answer

Answers

Answer:

x = 4.5 AND x = -4

Step-by-step explanation:

for the first answer

add 9 to 0 and divide by 2

for the second answer

subtract 4

Answer:

x = 9/2 and x = -4

Step-by-step explanation:

you can set each expression in the parenthesis' equal to zero. this is due to it being multiplication so if one parenthesis equals 0, the answer will be 0

2x - 9 = 0 and x + 4 = 0

starting with 2x-9=0

add 9 to both sides

2x = 9

divide by 2

x = 9/2

then do x + 4 = 0

subtract 4

x = -4

so your two answers are

x = 9/2 and x = -4

Someone plz help T^T

Answers

Answer:

No

Step-by-step explanation:

parallel means they do not touch.

Find 20% 0f 80.

using double number line

Answers

Answer:

100%     -     80

---------------------

20%      -      x

[tex]100x=80*20\\100x=1600\\x=\frac{1600}{100}\\x=16[/tex]

-1/6 x -3/5 the answer has to be a fraction

Answers

-1/6 x -3/5 = 3/30 = 1/10

The product of -1/6 x -3/5 = 1/10

The given expression is,

-1/6 x -3/5

In mathematics, a fraction is defined as a portion of the total. If a pizza is cut into four equal pieces, each slice is represented by 14. Fractions make it easier to distribute and assess numbers and speed up calculations. The depiction of fractions appears easier without the use of decimal values.

Now proceed the product,

Multiply numerator with numerator and denominator with denominator,

Therefore,

-1/6 x -3/5 = -1x(-3)/6x5

                = 3/30

                = 1/10

Hence,

-1/6 x -3/5 = 1/10

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I want to know how to expand x(4 - 3.4y)

Answers

X(4-3.4y)
= 4x - 3.4xy

Answer:

X(4-3.4y)

= 4x - 3.4xy

Step-by-step explanation:

Please help! I don't get it cause the person that was teaching it had horrible handwriting ;-;

Answers

Answer: power of a power

Step-by-step explanation:

in the expression (x^4)^9, 4 and 9 are powers. 9 is the power of x^4, so you have to multiply 4 by 9 to get x^36. this means it's a power of a power

Dr. Montgomery recently graduated from medical school and his wife bought him an engraved stethoscope. The stethoscope cost $160.00. The sales tax in his city is 8%. What is the total cost of the stethoscope in dollars and cents including sales tax?

Answers

Answer:

172.8

Step-by-step explanation:

Answer:

172.8

Step-by-step explanation: Dont Trust Me But Its Right B)

-1/6 + 4/5 Write your answer in simplest form

Answers

Answer:19/30

Step-by-step explanation:

1. multiply and divide(left to right)-1/6

=-1/6+4/5

2.multiply and divide(left to right)4/5

=-1/6+4/5

3. add and subtract(left to right)-1/6+4/5=19/30

=19/30

What is the area of the football field in the scale drawing? Assume that the field is shaped like a rectangle.

Answers

Answer:

i mean might as well get free points now that its 2 weeks old

Step-by-step explanation:

Answer:

Pythagorean Theorem: the diagonal of the football field is the hypotenuse. Let´s say the diagonal is C and the two other sides are A and B.

Width = A

Length = B

Diagonal = C

so: a2+b2=c

2502+1002=c2

2500+10000=c2

12500=c2

c=√12500

c=111.80 yards

Step-by-step explanation:

the ambitous jackle

In function for every input there is exactly one output

Answers

Answer:

It should be true, because without an output or input it would be an alien device that doesn't need any energy to work, making it true, also i dont really know if its true

Help !!! ANYBODY PLEASE HELP IM BEGGING U

Answers

Answer:

Step-by-step explanation:

Blue- x+10y-10z

A rectangular prism has a length of 10in, a height of 15in, and a width of 8in. What is its volume, in cubic in?

Answers

Answer:

1200 inc^3

Length x width x height

10 x 8 x 15= 1200

X, Y and Z are three points on a map. Y is 75km and on a bearing of 200° from X. Z is on a bearing of 150°, from Y. Z is due south of X. Calculate the distance between X and Z rounded to 1 DP.

Answers

Answer:

The distance between X and Z is approximately 114.9 km

Step-by-step explanation:

The given parameters are;

The distance of Y from X = 75 km

The bearing of Y from X = 200°

The bearing of Z from Y = 150°

The bearing of Z from X = 180°

In triangle XYZ, we have;

∠YZX = 180° - (130° + 20°) = 30°

By sine rule, we have;

(75 km)/sin(30°) = XZ/(sin(130°))

XZ = sin(130°) × (75 km)/sin(30°) ≈ 114.9 km

The distance between X and Z ≈ 114.9 km. to one decimal place.

What is the x-coordinate of the point that divides the directed line segment from J to K into a ratio of 2:5? m 4 m ][xz – xı) + x, -4 -2 2 4 ​

Answers

Answer:

2

Step-by-step explanation:

im sure its 2 i hope this helps

?? anyone know thank you

Answers

Answer:

19/20 is the correct answer

Answer:

19/20 quart

Step-by-step explanation:

the denominator should be the same so find some thing that is common to 4 and 5 so 20 and find what 4 in to 20 go 5 times so multiply 5×3=15 and 4×1=4 so add them together 15+4 = 19 so put 19 and 20 together equal 19/20

Find the slope of the graph below* Help me out ty

Answers

Answer:

-1

Step-by-step explanation:

When the line is slanting down it means its negative.

The answer is M = -1

The boys wrestling team scored a total of 36 points. Pins are worth 6 points. Major
decisions are worth 4 points. Write an equation to represent this situation.

Answers

Answer:

6p + 4d = 36

Step-by-step explanation:

If p = number of pins and d = number of major decisions, then the equation is 6p + 4d = 36.

Hope this helps!

Solve the inequality.
-4(2n-6)

Answers

Answer: -8n + 24

Step-by-step explanation:

-4(2n-6)

-8n + 24

Answer:-8n+24

Step-by-step explanation:

Find the inverse of function f.
$() = 9x + 7
OA /--) = 7x + 9
OB. 1 (1) = = -1
Oc. 7-1() = -98
OD. () = gr - 1
7

Answers

Answer:

C) f-1(x) = -9x - 7 the inverse of multiplication is division

someone do these please!

Answers

Answer:

I think the first option is better.

Step-by-step explanation:

First : 5.75% of $5000 is 287.5. 287.5 * 24 = 6900

And 6.55 of $5000 is 325. 325 * 36 = 117000

If she takes the first option it would be better because it is nearer to what she can afford. It is also better because it helps her make more than 5000 in less time.

HOPE THIS HELPED.

IF IT DOESN'T PLEASE COMMENT.

PQR with P(3, 6), 2-6, 6), R(0, 9); (x, y) = (x-3, y + 7)
оа
Ob
P'(0, 13), O'(-9, 13), R'(-3, 16)
P'(10,3), Q'(1,3), R' (7, 6)
P'(3, 7), e'(-6, 7), R' (0,7)
P'(-3, 13), e' (3, 13), R'(-3, 16)

Answers

Answer:

We have the answer as:

P'(0, 13), O'(-9, 13), R'(-3, 16)

Step-by-step explanation:

Here, we want to find the coordinates of the image after applying the transformation rule to the pre-image

what the transformation rule is saying is that we subtract 3 from the x-coordinate and add 7 to the y-coordinate

mathematically, we have these as follows;

P’ = (3-3, 6 + 7) = (0,13)

Q’ = (-6-3, 6 + 7) = (-9,13)

R’ ( 0-3, 9 + 7) = (-3, 16)

What is valué of the x-coordínate that is 9 units to the left (5,-8)

Answers

Answer: -4

Step-by-step explanation:

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