A large supermarket chain was interested in seeing if they could increase their holiday sales by starting their Black Friday sales 2 hours earlier than normal. To test this, they randomly selected half of their 500 stores and told them to start their sales at the new starting time, while the other half of the stores would start at the standard starting time. Which of these answers represents an element of replication in this study?
a. they randomly selected half
b. their 500 stores
c. while the other half of the stores would start at the standard starting time
d. 250 stores

Answer:

4/6 or 2/3.

Step-by-step explanation:

You need to multiply 1/2 by 3/3 so you can can the denominater having a 6.

Answer:

So, we know that the speed of the aircraft is 600 miles /per hour/. The question is, how many miles does it travel over 6 hours?

Since “per hour” means it travels that far in 1 hour, we need to take that speed (600mph) and multiply it by 6, since we were asked about the distance in 6 hours.

So:

600*6=3600

And we get a total of 3600 miles traveled in 6 hours, as opposed to 600 miles in 1 hour.

Answer:

8.38 m^3

Step-by-step explanation:

The volumes are in proportion to the cubes of their radii.

Compare volumes in the form  big cone / small cone.

[tex]\frac{131}{V_\text{small}}=\frac{5^3}{2^3}\\\frac{131}{V_\text{small}}=\frac{125}{8}[/tex]

"Cross multiply."

[tex]125V_\text{small}=8\cdot131\\125V_\text{small}=1048\\V_\text{small}=\frac{1048}{125}\approx 8.34\text{ cm}^3[/tex]

Answer:

The required confidence inteval = 94.9%.

Step-by-step explanation:

Confidence interval: Mean ± Margin of error

Given: A confidence interval for the true mean diameter of all oak trees in the neighbourhood is calculated to be (36.191, 42.969).

i.e.  Mean + Margin of error = 42.969               (i)

Mean - Margin of error = 36.191                    (ii)

Adding (i) and (ii), we get

[tex]2Mean =79.16\\\\\Rightarrow\ Mean= 39.58[/tex]

Margin of error = 42.969-39.58             [from (i)]

= 3.389

Margin of error = [tex]t^* \dfrac{\sigma}{\sqrt{n}}[/tex]

here n= 25 [tex], \ \sigma=8.25[/tex]

i.e.

[tex]3.389=t^*\dfrac{8.25}{5}\\\\\Rightarrow\ t^* = \dfrac{3.389}{1.65}\\\\\Rightarrow\ t^* =2.0539 \[/tex]

Using  excel function 1-TDIST.2T(2.054,24)

The required confidence inteval = 94.9%.

Answer:

O A).

Step-by-step explanation:

Answer:

A = (-6, 4)

B = (2,2)

C =  (-2, 2)

Step-by-step explanation:

If a coordinate (x, y) is dilated by a factor of k, the resulting coordinate will be expressed as (kx, ky). Note that each coordinate is multiplied by the scale factor

Given the coordinates (-3,2),(1,1)(-1,-1), if they are dilated by a factor of 2, the resulting coordinate will be;

A = (2(-3), 2(2)) = (-6, 4)

B = (2(1),2(1)) =(2,2)

C = (2(-1), 2(-1)) = (-2, 2)

Answer:

the mean is 7

Step-by-step explanation:

used a mean calculator

Answer:

(-3/8)/(-1/3)

=(-3/8) x (-3)

=9/8

=11/8

Step-by-step explanation:

Answer:

$420

Step-by-step explanation:

In the figure, the living room is 5 cm by 3.5 cm.

We use the scale to convert to the real measurements.

1 cm = 4 ft

5 cm * 4 ft/cm = 20 ft

3.5 cm * 4 ft/cm = 14 ft

The actual dimensions of the room are 20 ft by 14 ft.

actual area = 20 ft * 14 ft = 280 ft²

carpet cost = $1.50/ft²

cost of carpet = 280 ft² * $1.50/ft²

cost of carpet = $420

Answer: $420

Answer:

Step-by-step explanation:

Do 51360-48000= (A)

Then do

Difference (A) / 48000

All times by 100

Answer:

a = 14

Step-by-step explanation:

28[-14]=14;

-14

Answer:

A= -14

Step-by-step explanation:

a + 28 = 14

28-14=14

make 14 an negative then add

-14 + 28 = 14

*pls give brainlist*

Answer:

14.1 ft

Step-by-step explanation:

A = 200 ft^2

s = √A

s = √(200ft^2)

s = 14.1 ft

Please mark brainliest if this helped!

Please mark brainliest if this helped!

The length of each side of his patio is S = 14.1ft.

Given that,

Chip has enough concrete to pave a square area of 200ft^2 for a backyard patio,

Use the formula S=√A.

We have to determine,

The length of each side of his patio.

According to the question,

Chip has enough concrete to pave a square area of 200ft^2 for a backyard patio,

To obtain the length of each side of patio using the given formula.

Formula; [tex]S= \sqrt{A}[/tex]

Where, [tex]A = 200ft^2[/tex]

Substitute the value of A in the given formula,

[tex]S = \sqrt{A}\\\\S = \sqrt{100 (ft)^2}\\\\S = 14.1ft[/tex]

Hence, The length of each side of his patio is S = 14.1ft.

To know more about Surface Area click the link given below.

https://brainly.com/question/11777802

Answer:

A,b I’m pretty sure

Step-by-step explanation:

Answer:

b=3/4

Step-by-step explanation:

((3/4)x)/2=9/32

The length of the base will be 3/4. The length of the base from formula of area of triangle.

The area of the triangle is half of the length and base of the triangle.Area of triangle is found as;

[tex]\rm A= \frac{1}{2} \times L \times B\\\\ A=\frac{9}{32} \\\\ \frac{9}{32} =\frac{1}{2} \times \frac{3}{4} \times B \\\\ B=\frac{3}{4}[/tex]

Hence,the length of the base will be 3/4.

To learn more about area of triangle refer;

https://brainly.com/question/19305981

#SPJ2

Answer:

Explanation:

7 - 1 = 6

2/3 = 4/6

so

5 - r = 4

r = 5 - 4

r = 1

(1, 1) (7, 5)

Answer:

Step-by-step explanation:

Standard equation of a circle is given by,

(x - h)² + (y - k)² = r²

Here, (h, k) is the center of the circle.

From the graph given in the picture,

Center of the circle → (-1, 1)

Radius of the circle = 3 units

Therefore, standard equation of the circle will be,

(x + 1)² + (y - 1)² = 3²

(x + 1)² + (y - 1)² = 9

General equation of the circle is the expanded form of the standard equation.

x² + 2x + 1 + y² + 1 - 2y = 9

x² + y² + 2x - 2y + 2 = 9

x² + y² + 2x - 2y - 7 = 0

Therefore, general equation of the given circle is,

x² + y² + 2x - 2y - 7 = 0

Answer:D

Did it on khan academy

Answer:

the number of miles did he drive the truck is 276 miles

Step-by-step explanation:

The computation of the number of miles did he drive the truck is as follows

Let us assume the mileage be m

Now according to the question

0.8m + 18.99 = 239.79

0.8m = 239.79 - 18.99

0.8m = 220.8

m = 276

Hence, the number of miles did he drive the truck is 276 miles

The above represent the linear equation

Answer:

-7

Step-by-step explanation:

Answer:

(-9) + 9 = 0

The integer that should be added is nine

Step-by-step explanation:

when you have a negative integer and you added it by itself but it's a positive instead of a negative the positive takes over the negatives and makes it zero. I hope that made sense

Answer:

1/5

Step-by-step explanation:

5 out of 25 reduces to 1 out of 5

Answer:

[tex]x=-9[/tex]

Step-by-step explanation:

[tex]36^{x-3}=1296^{x+3}\\(6^2)^{x-3}=(6^4)^{x+3}\\2(x-3)=4(x+3)\\x-3=2x+6\\x+6=-3\\x=-9[/tex]

Short answer (I write nPr = P(n, r) and nCr = C(n, r) ):

P (6, 4) = 6! / (6 - 4)! = 6! / 2! = 720 / 2 = 360

C (6, 4) = P (6, 4) / 4! = 6! / (4! (6 - 4)!) = 360 / 24 = 15

Long answer:

P(n, r) counts the number of permutations of n objects taken r at a time, given by

P(n, r) = n ! / (n - r )!

A permutation is a unique arrangement of objects such that the order in which they are arranged is taken into account. For example, if the objects in question are the numbers in the set {1, 2, 3}, then

• there are 3! = 6 total possible permutations if we take all 3 numbers at once:

123, 132, 213, 231, 312, 321

• there are 3!/(3-2)! = 3!/1! = 6 total permutations if we only take 2 numbers at once:

12, 13, 21, 23, 31, 32

• there are 3!/(3-1)! = 3!/2! = 3 total permutations if we take only 1 number at a time:

1, 2, 3

• and there is 3!/(3-0)! = 3!/3! = 1 way of permuting the 3 numbers without taking any of them:

(the permutation itself is just empty space)

By contrast, C(n, r) counts the combinations of n items taken r at a time, given by

C(n, r) = P(n, r) / r !

A combination is like a permutation, but the order of the objects doesn't matter. Continuing with the previous example of arrangements of the numbers from {1, 2, 3}, we have

• 3! / (3! (3-3)!) = 1 combination taking all 3 numbers at once:

123

(the other 5 permutations listed earlier are made up of the same numbers, so we consider them duplicates)

• 3! / (2! (3-2)!) = 3 combinations taking only 2 numbers at once:

12, 13, 23

• 3! / (1! (3-1)!) = 3 combinations taking only 1 number:

1, 2, 3

• 3! / (0! (3-0)!) = 1 combination taking none of them:

(again, empty space)

The main point is that the order of objects is considered across permutations, while it's ignored across combinations.

Answer:

1\9

Step-by-step explanation:

probability of picking 6 once is 1/3

then picking 6 again would be 1/9

Answer:

2.5 Grams

Step-by-step explanation:

You divide 25 by 10 giving you 2.5 Grams.

Answer:

It does not restate the thesis.