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Sarah is testing different types of planting soil to determine which type is most effective in growing blueberry bushes. She purchases two different brands of planting soil from a local store. Sarah applies Brand A to 1 area of the yard and Brand B to another area of the yard, both of which receive full sunlight. She waters the area with Brand B daily; she waters the area with Brand A every other day. At the end of the study, Sarah concludes Brand B is more effective in growing blueberry bushes. Why is her conclusion not valid,

Answers

Answer 1

Sarah's conclusion is invalid, because she is testing two variables at once without a control value. In order for the experiment to be valid, Sarah should either apply the same soil to both areas (assuming they are, in fact, the same). Or, she should water both equally. At this time, we don't know if B grew "better" due to the brand or the amount of water received.

Related Questions

Draw a bar model to represent the expression m divided by 4

Answers

Bar models can be used to represent the quotient and the product of numbers or expressions

How to draw the bar model

Represent the division of m by 4 with x.

So, we have:

[tex]\frac m4 = x[/tex]

Multiply both sides of the equation by 4

[tex]4 * \frac m4 = x * 4[/tex]

Evaluate the products

[tex]m = x * 4[/tex]

So, we have:

[tex]m =4x[/tex]

See attachment for the bar model

Answers

Acceleration is the change in velocity, so if there is zero acceleration, the ball's speed and direction are constant. Therefore, the only plausible answer to our question is B. This is because the ball's speed stays the same, and its direction is also constant.

Please help with this.

Quadrilateral ABCD is inscribed in circle O.

What is m∠C ?

Enter your answer in the box.

Answers

Hello,

When you have an polygon inscribed in a circle, the opposite angles are supplementary.

Therefore, we can write and solve the following equation.
2x + 3 + 4x + 3 = 180
6x = 174
x = 29

If you substitution 29 into the expression for C, you will find that C = 59.
2(29) + 1 = 59

Good luck,
MrEQ

Consider the diagram.

The congruence theorem that can be used to prove △LON ≅ △LMN is

SSS.
ASA.
SAS.
HL.

Answers

Side Side Side is the answer

We have been given an diagram and we are asked to find the congruence theorem that can be used to prove △LON ≅ △LMN.

We can see from our diagram that side LO of △LON equals to side LM of △LMN. We can also see that side ON △LON of equals to side MN of △LMN. Side LN equals to itself.

We can see that three sides of triangle LON are congruent to three sides of triangle LMN. Therefore, by SSS (Side-Side-Side) congruence △LON ≅ △LMN.

If a and b are real numbers and if y = ax + b is a direct variation equation, what do you know about a and b?

Answers

y = ax + b
We observe that the given equation is the generic equation of a line.
Where,
a = represents the slope of the line. That is, the rate of change of the given function. (in this case it is constant).
b = is the cut point with the y axis.

PLEASE HELP ASAP! BRAINLIEST TO BEST/RIGHT ANSWER

Answers

i think that should be "D" or "A"

The answer is .5 or 1/2

In need of some help please.

Answers

By the Pythagorean theorem
50^2 = x^2 +(x +34)^2
2500 = 2x^2 +68x + 1156
x^2 +34x -672 = 0
(x -14)(x +48) = 0
x = 14 or -48

The distance from the wall to the base of the ladder is 14 ft.

_____
7-24-25 is a Pythagorean triple. The dimensions here are double those values. It can be handy to know a few of the Pythagorean triples, as that can let you write down the answers to problems without having to go through the equations.

One gallon of paint covers 200 square feet. How many gallon are needed to paint a rectangular floor that is 60 feet by 40 feet

Answers

Area of floor=(60)(40)=2400 square feet

1 gallon for 200 sq ft

(2400 sq ft)/(200 sq ft) = 12 gallons of paint

A bag contains 18 blocks numbered from 1 to 18. Two blocks are selected from the bag at the same time. Let event E = the two numbers differ by 11. How many outcomes are in E? A) 7 B) 14 C) 28 D) 292

Answers

the correct answer is A 7

Answer:

A) 7

Step-by-step explanation:

E is when the numbers differ by 11, so these pairs work:

(1, 12), (2, 13), (3, 14), (4, 15), (5, 16), (6, 17), (7, 18)

Thus, there are 7 outcomes where the numbers differ by 1

Which relationship shows an inverse variation?
x: 2,3,4,5
f(x):1,4,9,16

x:1,2,3,4
f(x):2,8,18,32

x:1,2,3,4
f(x):4,3,2,1

X:2,4,6,8
f(x):12,6,4,3,

Answers

Only in the 4th selection do you have x*f(x) = constant (= 24). That selection shows an inverse variation.

Answer:

x : 2,4,6,8

f(x) :12,6,4,3

This table represents the relationship of an inverse variation.

Step-by-step explanation:

We are asked to find which relationship shows an inverse variation.

Inverse variation means that there exist a constant 'k' such that:

f(x)=k/x

or, k=x·f(x)

x : 2, 3, 4, 5

f(x): 1, 4, 9, 16

if x=2 and f(x)=1

k=2

but if x=3 and f(x)=4

we get: k=12.

Hence, we do not obtain a same constant k.

x: 1,2,3,4

f(x):2,8,18,32

when x=1 , f(x)=2

⇒ k=2

when x=2 , f(x)=8

⇒ k=16

Hence, we did not get a same constant 'k'.

x: 1,2,3,4

f(x):4,3,2,1

when x=1, f(x)=4

⇒ k=4

when x=2 , f(x)=3

⇒ k=6

Hence, we did not get a same constant 'k'.

x :2,4,6,8

f(x) :12,6,4,3

when x=2 f(x)=12

⇒ k=2×12=24

when x=4 f(x)=6

⇒ k=4×6=24

when x=6 f(x)=4

⇒ k=6×4=24

when x=8 f(x)=3

⇒ k=8×3=24

Hence, we get a constant 'k=24' for all the values of x.

Hence, option: 4 shows relationship of an inverse variation.

x :2,4,6,8

f(x) :12,6,4,3

Please help on the circle question ASAP

Answers

Area = pi * radius ^2
314 = 3.14 * radius ^2
100 = radius ^2
radius = 10

Please help :( 2 questions..

If c(x)=5/x-2 and d(x)=x+3 what is the domain of (cd)(x)?

And, if f(x)=7+4x and g(x)=1/2x, what is the value of (f/g)(5)?,

Answers

First note that since there are no parantheses in c, then c(x)=(5/x)-2. If c(x)=(5/x)-2 and d(x)=x+3, then (cd)(x) means multiply c(x)*d(x). c(x)*d(x)=[(5/x)-2]*(x+3). We multiply each term by each term and we get (5/x)*x-2*x+3*(5/x)-2*3=(5/x)(x/1)-2x+(3/1)(5/x)-6=5-2x+(15/x)-6. Since we have an x in the denominator, it cannot be 0. There are no other restrictions except x cannot be 0. SO the domain is (-infinity,0)U(0,infinity) or All Real numbers except x=0. For (f/g)(5), f(5)=7+4*5=27 and g(5)=(1/2)(5)=(5/2). (f/g)(5)=f(5)/g(5)=27/(5/2) and by inverting and multiplying we get 27*(2/5)=54/5.

I just took the test for the first question its all real values of x except x=2. I got it right. And i believe the answer to the second one is 270. Hope this helps! Good luck (:

A 36-foot long fence is placed around a square garden. What is the length of one side of the garden? (1 point)

4 feet
6 feet
9 feet
12 feet

Answers

36/4 = 9 Feet on Each Side

If we know the length of the fence around a garden, we know the garden's perimeter. We also know that the garden is a square. Since squares have four sides that are each the same length, we know that the length of 1 side will be 36 feet / 4, or 9 feet.

What equation is equivalent to 9^(x-3)=729?

Answers

729 = 9³

The 2nd selection is appropriate.

Answer:

Next one is six

Step-by-step explanation:

Im doing the assignment rn, it always seems about halfway through an edge course brainly users lose braincells because they keep saying next one is 81.333

Currently, the highest tax bracket in united state is____.

A. 1%
B. 10%
C. 0%
D. 35%

Answers

the answer should be D hope this helps :)

Answer:

35%

Step-by-step explanation:

An angle measures 44° more than the measure of a supplementary angle. what is the measure of each angle?

Answers

the measure of each angle is 68*

The correct answers are:

68° and 112°.

Explanation:

Let x be the measure of the smaller angle.

The larger angle would then be x+44.

Since the angles are supplementary, their sum measures 180°. This gives us the equation:

x+(x+44) = 180

Combining like terms, we have

2x+44 = 180

Subtract 44 from each side:

2x+44-44 = 180-44

2x = 136

Divide each side by 2:

2x/2 = 136/2

x = 68

The smaller angle measures 68°.

The larger angle is 44° more:

68+44 = 112°

The rule (x,y) →(x + 7, y - 10) represents a translation

7 units left and 10 units up

7 units right and 10 units down

7 units right and 10 units up

7 units left and 10 units down

Answers

The last on is the answer hopes this helps

help help help me
please

Answers

when the base is the same, and it is a ÷, subtract the exponents (if it is a ×, add the exponents):
-11/3-(-2/3)=-9/3=-3
4^(-3)=1/4³=1/64
the first choice is correct.

[tex]4^{- \frac{11}{3} }:4^{- \frac{2}{3} }=4^{- \frac{11}{3}-(- \frac{2}{3})}=4^{- \frac{11}{3}+ \frac{2}{3}}=4^{- \frac{9}{3}}=4^{-3} = \frac{1}{4^3}= \frac{1}{64} [/tex]

The answer is A

If a plane slices a cube through three points that are equidistant from one of its vertices, which of the following best describes the cross-section of the cube?

Answers

Answer: The cross section would be a triangle.

Imagine a object that is a cube, like a dice. Start at one vertice and measure down 3 edges the same distance.

Now, imagine that you cut through those 3 dots and cut off the corner. The resulting base of your new shape would be the cross section. It would be a triangle.

Answer:

Triangle

Step-by-step explanation:

A cube is a three-dimensional figure with six congruent square faces. The cube below is sliced by a plane through three points that are equidistant from one of its vertices.

The cross-section created by the plane is an equilateral triangle.

Therefore, traingle is the best choice.

A horse-drawn carriage tour company has found that the number of people that take their tour depends on the price charged per customer. The more the company charges for a tour, the fewer people decide to take the tour.

The function c(x)=50+5x represents price charged per customer where x is the number of $5 increases they charge over a rate of $50 per person.

The function p(x)=100−2x represents the number of customers expected for the day, where x is the number of $5 increases they charge over a rate of $50 per person.

What does (p⋅c)(2) mean about the horse-drawn carriage tour company?

The horse-drawn carriage tour company can expect to take in $3760 when the charge per customer is $60.

The horse-drawn carriage tour company can expect to take in $5760 when the charge per customer is $60.

The horse-drawn carriage tour company can expect to take in $3760 when the charge per customer is $40.

The horse-drawn carriage tour company can expect to take in $5760 when the charge per customer is $40.

Answers

(p * c) =
(100-2x) (50+5x)

(p * c) (2) =
(100-2*2) (50+5*2)
(96) (60)
=5760

Answer is B.

Answer:

B. The horse-drawn carriage tour company can expect to take in $5760 when the charge per customer is $60.

Step-by-step explanation:

We have,

The function representing the price charged by the customers is [tex]c(x)=50+5x[/tex].

The function representing the number of customers is [tex]p(x)=100-2x[/tex].

Then, the product of the functions is given by,

[tex](p\times c)(x)=p(x)\times c(x)\\\\(p\times c)(x)=(100-2x)(50+5x)\\\\(p\times c)(x)=-10x^2+400x+5000[/tex]

Substituting x = 2 in the above product gives,

[tex](p\times c)(2)=-10\times 2^2+400\times 2+5000\\\\(p\times c)(2)=-40+800+5000\\\\(p\times c)(2)=\$ 5760[/tex]

Also, the charge per customer when x = 2 is,

[tex]c(x)=50+5x\\\\c(x)=50+5\times 2\\\\c(x)=50+10\\\\c(x)=\$ 60[/tex]

Hence, the product (p-c)(2) represents,

B. The horse-drawn carriage tour company can expect to take in $5760 when the charge per customer is $60.

AC←→ is tangent to the circle with center at B.
The measure of ∠ACB is 71°.

What is the measure of ∠ABC?
Enter your answer in the box.
m∠ABC = __ °

Answers

I'm pretty sure the answer is "19", but if i'm wrong please don't kill me.

Answer: The value of m∠ABC = 19 °

Step-by-step explanation:

Since we have given that

AC is tangent to the circle with center at B.

The measure of ∠ACB = 71°

And we know that "Radius is the shortest distance from the center to the tangent".

So, Radius is always perpendicular to the tangent.

So, the measure of ∠BAC = 90°

Consider, ΔABC, we get that

[tex]\angle ABC+\angle BAC+\angle ACB=180^\circ\\\\\angle ABC+90^\circ+71^\circ=180^\circ\\\\\angle ABC=180^\circ-90^\circ-71^\circ\\\\\angle ABC=19^\circ[/tex]

Hence, the value of m∠ABC = 19 °

Easy Algebra 2 Rational Expressions question

Answers

Set the bottom equal to 0

x - 8 = 0
x = 8

PLEASE HELP!!!
A park charges $15 for one round of miniature golf and a reduced fee for each additional round played. If Tom paid $25 for 6 rounds of miniature golf, what is the reduced fee for each additional round played?

Answers

1 round = $15
6 round = $25

So, (25-15/6-1) = 10/5 = 2.

Check:
1r - 15
2r - 17
3r - 19
4r - 21
5r - 23
6r - 25

A company developed the following linear model to help budget annual expenses over time. In this model, x represents the number of years after 2009, and y represents the expense budget (in dollars). Interpret the y-intercept. y = 189,785 + 37,896x

A. The company's expense budget for 2009 was $189,785.

B. The company's expense budget for 2008 was $37,896.

C. The company's expense budget for 2009 was $37,896.

D. The company's expense budget for 2008 was $189,785.

Answers

The only reasonable answer I could think for this is "A.The company's expense budget for 2009 was $189,785."
I believe this because since x is the years after 2009 then you wouldn't times that by the expense budget for that year or any year eliminating B and C. When finding the total expense budget for this you would have to take in account the budget from 2009 so that would lead it to add 189,758. Since we are talking about after 2009 then D would be eliminated since 2008 is before 2009.
I hope this helps! Good luck!

Your friend is looking at laptops for college, and is comparing the different screen sizes. Use the diagram and formula below to find the width of the laptop screen. Round your answer
D= W^2+H^2
(The image of the figure is a rectangle in half, the top side is D= 17inch the H= 9inch, W is blank)
Mutiple choices are
A. W= 16.7 inch
B. W= 9.9 inch
C. W= 8 inch
D. W= 14.4 inch

Answers

For this case what we should do is write correctly the given equation:
D ^ 2 = W ^ 2 + H ^ 2
We substitute the values:
D = 17inch
H = 9inch
Substituting:
17 ^ 2 = W ^ 2 + 9 ^ 2
We clear the value of W:
W = root (17 ^ 2 - 9 ^ 2)
W = 14.4 inch
Answer:
The width of the laptop screen is:
D. W = 14.4 inch

Answer:

The Answer is 14.4inch for Apex!

Step-by-step explanation:

Forty percent of the sheets of construction paper are secondary colors. There are 25 sheets of construction paper. How many of those sheets are secondary colors?

Answers

10 of those sheets are secondary colors.

40% = 0.4
0.4(25) = 10

Total Number of sheets of construction paper= 25

The Percent of the sheets of construction paper that are secondary color = 40%

Percent means out of 100.To find number of secondary color sheet we find 40% of 25.

40%=[tex] \frac{40}{100} [/tex]

Number of sheets which are of secondary color=[tex] \frac{40}{100} of 25 =\frac{1000}{100} =10 [/tex]

Number of secondary color sheets =10.

Ellipses have symmetry through only their major axis?
True or False?

I think false. They have them through both major and minor.,

Answers

False. Ellipses have symmetry through both major and minor axis. In order to actualize, think about folding the ellipse in half on both axis, this will create two mirror images, and thus two lines of symmetry.

A few years ago, a total of 2682 thousand people lived in the metropolitan areas of Las Vegas, Nevada, and Sacramento, California. Sacramento had 276 thousand more residents that Las Vegas. What was the population of each metropolitan area? 50 POINTS

Answers

2,682,000 total

2,682,000 - 276,000 = 2,406000

2,406,000 / 2 = 1,203,000 lived in Nevada

1,203,000 + 276,000 = 1,479,000 lived in California

A store sells 1 gallon of lemonade for 7 dollars and 1 quart of lemonade for 2 dollars. Horace has 11 dollars to buy 6 quarts of lemonade for a party.Explain whether he has enough money.

Answers

To find how much 6 quarts would cost we would need to do 6q(x)$2 to find the total. 6q(x)$2=$12 [Q as in quarts] He would need one more dollar to be able to purchase 6 quarts, but he only has enough money for 5.

starting with 25 members a club doubled its membership every year write the function f(n) that expresses the number of members after six years

Answers

[tex]\bf \qquad \textit{Amount for Exponential Growth}\\\\ A=P(1 + r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\\ r=rate\to r\%\to \frac{r}{100}\\ t=\textit{elapsed time}\\ \end{cases}[/tex]

now, we know they're doubling every year, so the rate of growth is 100%, so whatever amount, + 100% is just double that much, therefore,

[tex]\bf \qquad \textit{Amount for Exponential Growth}\\\\ A=P(1 + r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\to &25\\ r=rate\to 100\%\to \frac{100}{100}\to &1.00\\ t=\textit{elapsed time}\to &6\\ \end{cases} \\\\\\ A=25(1+1)^6\implies A=25(2)^6\implies A=1600[/tex]

The number of members after six years is 1600.

We have given that,

starting with 25 members a club doubled its membership every year write the function f(n) that expresses the number of members after six years.

What is the formula for exponential growth?

[tex]A=P(1+r)^t[/tex]

A=Amount

P=initial amount

r=rate

t=time

now, we know they're doubling every year, so the rate of growth is 100%, so whatever amount, + 100% is just double that much, therefore

[tex]A=25(1+1)^6\\A=25(2)^6\\A=1600[/tex]

Therefore we get the number of members after six years is 1600.

To learn more about exponential growth visit:

https://brainly.com/question/7920039

#SPJ2

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