A company that makes robotic vacuums claims that their newest model of vacuum lasts, on average, two hours when starting on a full charge. To investigate this claim, a consumer group purchases a random sample of five vacuums of this model. They charge each unit fully and then measure the amount of time each unit runs. Here are the data (in hours): 2.2, 1.85, 2.15, 1.95, and 1.90. They would like to know if the data provide convincing evidence that the true mean run time differs from two hours. The consumer group plans to test the hypotheses H0: μ = 2 versus Ha: μ ≠ 2, where μ = the true mean run time for all vacuums of this model. Are the conditions for inference met?
No, the random condition is not met.
No, the 10% condition is not met.
No, the Normal/large sample condition is not met.
Yes, all conditions for inference are met.
Answer:
2 one is the right one
Step-by-step explanation:
A group of friends wants to go to the amusement park. They have no more
than $110 to spend on parking and admission. Parking is $19.25, and tickets
cost $30.25 per person, including tax. Write and solve an inequality which
can be used to determine x, the number of people who can go to the
amusement park.
Answer:
if the number of the friends is x...
19.25+30.25x ≤ 110
x ≤ 3
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Helppppp
a. 90
b. 85
c. 75
d. 115
Answer:
85is the correct answer
Anika buys a pair of shin guards for $8.58 and several pairs of soccer socks for $4.29 per
pair. If she spends $25.74 before taxes, how many pairs of socks does Anika buy?
Answer:
The answer is 4 pairs of socks
Step-by-step explanation:
So basically long story short, this is a simple division and multiplication problem.
(x+3)^2=43
When taking the square root of both sides of this equation, how many solution will the equation have?
In what ratio must 40m3 be decreased to become 24m3?
Answer:
40m3 must be decreased by 40% to become 24m3.
Step-by-step explanation:
To determine in what ratio must 40m3 be decreased to become 24m3, the following calculation must be performed:
40 = 100
24 = X
24 x 100/40 = X
2400/40 = X
60 = X
100 - 60 = 40
Therefore, 40m3 must be decreased by 40% to become 24m3.
The green parallelogram is a dilation of the black parallelogram. What is the scale factor of the dilation?
A) 1/3
B) 1/2
C) 2
D) 3
=============================================================
Explanation:
"The green parallelogram is a dilation of the black parallelogram"
This tells us that the preimage is the black parallelogram and the image is the green one.
In short, the mapping is [tex]\text{black} \to \text{green}[/tex]
The image is smaller than the preimage (green is smaller than black), indicating the scale factor is some value of k such that 0 < k < 1. We can rule out choices C and D because of this.
--------------------
Measuring along the top, we can see that the black parallelogram goes from x = -6 to x = 8. Check out the image shown below where I've marked your given diagram, adding on helpful lines to show this going on.
The number-line distance from x = -6 to x = 8 is 14 units, so the top side of the black parallelogram is 14 units long.
The corresponding top side of the green parallelogram is 7 units long (because it spans from x = -3 and x = 4; as shown in blue in the figure below).
Divide the image length over its corresponding preimage length to get the scale factor.
scale factor = (image length)/(preimage length)
scale factor = 7/14
scale factor = 1/2
which points to choice B as our final answer.
Answer:
THE ANSWER IS C)2
Step-by-step explanation:
I GOT IT WRONG CUZ THIS DUDE ABOVE MEEE
(im big mad)
Match each expression in List A with an equivalent expression from List B.
Answer:
B——1
C——3
The answer u got in A and D r correct
Step-by-step explanation:
B=5x+10y-20y+5x=10x-10y=10(x-y)—- 1
C——3
Need help ASAP PLEASE DUE SOON!!!
Answer:
11
Step-by-step explanation:
all u need to do is to cube root 1331, because it is a cube. hope i helped.
Is the point (3, −5) within the shaded region?
The answer must be true or false
Answer:
its false
Step-by-step explanation:
Find the angle of x please
Answer:
i believe the answer is x= 85
Can someone Simplify this.
(2a+5)^2
Answer:
[tex]4a^{2} + 20a+25[/tex]
Step-by-step explanation:
[tex]( 2a+ 5 ) ( 2a + 5 )[/tex]
[tex]2 a ( 2 a + 5 ) + 5 ( 2 a + 5 )[/tex]
[tex]4 a^{2} + 1 0 a + 5 ( 2 a + 5 )[/tex]
[tex]4a^{2} + 1 0 a + 1 0 a + 2 5[/tex]
[tex]4a^{2} + 20a+25[/tex]
Answer:
[tex]4a^{2}[/tex]+20a+25
Step-by-step explanation:
The question and answers are there
Which net represents this box?
Answer:
image
Step-by-step explanation:
GIVING BRAINLIEST, EASY 7TH GRADE MATH PROBLEM.
Answer:
Step-by-step explanation:
c
36x+27y in factored form
What are the volume of a rectangular pyramid with a length of 39 m, a width of 15 m, and a height of 16 m?
Answer:
3120 m³
Step-by-step explanation:
The diameter of a circle is 50.267 feet. Find the circumference of the circle and use 3.14 for π. Round your answer to the nearest whole number.
The circumference is
feet.
Answer:
C=2πr=2·π·25.13≈157.9153
Step-by-step explanation:
If 5 inches represent 12 miles, how many inches represent 108 miles?
In direct variation y = kx. What is the value of k if y = 20 and x = 4 ?
What was the function of the polis as it developed in Greek civilization?
Answer: "A city-state, or polis, was the community structure of ancient Greece. Each city-state was organized with an urban center and the surrounding countryside. Characteristics of the city in a polis were outer walls for protection, as well as a public space that included temples and government buildings."
"The polis was a structure of community amongst the ancient Greek world and it controlled a surrounding territory of land. An individual polis was independent from the other poleis in regards to legal, religious, social, political and judicial institutions and practices."
Answer:
~The function of the polis as it developed in Greek civilization is it was designed for areas such as private, public, religious functions and buildings. It was often used in the Iron age development for public buildings. Hoped that helped.~
Step-by-step explanation:
The circle is divided into 3600 equal parts. Point O represents the center of the circle. The measure of angle
Answer:
0.1°
Step-by-step explanation:
Okay so, a circle is 360° and the circle is divided into 3600 parts. So, to find the measurement of one of those angles, we would do 360°/3600= 0.1°.
Can somebody help me out my grade are bad
Answer:
N-3
Step-by-step explanation:
8. Let U= {x:x e P and x< 12} be the
universal set and A = {1, 3, 5, 6, 7},
B= {4, 6, 7,9}.
Find: i) A' ii) B' iii) An B'
Answer:
b is a answer I think so hmmm
Which is an expression for 175 without a perfect square factor in the radicand?
simply 1/2 square root of 32
I NEED HELP ASAP
The volume of a cylinder is 14,130 ft 3 . If the diameter is 30 feet, calculate the height of the cylinder
Answer:
V = PI*r2h
In plain english the volume of a cylinder can be calculated by squaring the radius, multiplying that value by PI, then multiplying by the height. You can also think of it as finding the area of a flat circle (PI * radius squared) and multiplying by the height to find volume.
Here is a step-by-step case that illustrates how to find the volume of a cylinder with a radius of 3 inches and a height of 5 inches. In this example PI will be 3.14.
V = pi * r2 * h
= pi * 32 * 5
= pi * 9 * 5
= 3.14 * 45
= 141.37 cubic inches
Step-by-step explanation:
The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm.
The height of the cylinder is given by h = 20 feet
What is a Cylinder?A cylinder is a three-dimensional shape consisting of two parallel circular bases, joined by a curved surface. The center of the circular bases overlaps each other to form a right cylinder. The volume of a cylinder is
Volume of Cylinder = πr²h
Surface area of cylinder = 2πr ( r + h )
where r is the radius of the cylinder
h is the height of the cylinder
Given data ,
Let the height of the cylinder be h
Now , the volume of the cylinder V = 14,130 feet³
The diameter of the cylinder d = 30 feet
So , the radius of the cylinder r = d/2 = 15 feet
And , Volume of Cylinder = πr²h
On simplifying , we get
14,130 = π( 15 )²h
Divide by 225 on both sides , we get
πh = 62.8
Divide by π on both sides , we get
h = 62.8 / 3.14
h = 20 feet
Therefore , the value of h is 20 feet
Hence , the height of the cylinder is 20 feet
To learn more about cylinder click :
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The sum of two numbers is 41. The larger number is 21 more than the smaller number. What are the numbers?
Please help!
Answer:
srry its 31 and 10
Step-by-step explanation:
the numbers are 20 and 21
Hope I helped! :)
Matching the Transformed Function to its Graph
Use your knowledge of transformations to find the matching graph.
f(x) = 2 sqrt x + 1
Answer:
D
Step-by-step explanation:
Used graphing calculator. Correct on edge.
By transformations, the resultant graph will be option D.
What is called Dilation?Dilation is a non-rigid transformation that stretch the graph vertically.If F(x) = k.f(x), then the graph will stretch vertically by k units.What is translation?Translation is a rigid transformation that shift the graph upwards or downwards.If F(x)=f(x)+k, then the graph shift upwards k units.If F(x)=f(x)-k, then the graph shift downwards k units.Hence, the resultant graph of
[tex]f(x) = 2 \sqrt{x } + 1[/tex]will be option D.
Learn more about transformation of graph here:
https://brainly.com/question/1548871
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