Answer: D: A random sample of 1000 people from each of the 50 states
Step-by-step explanation:
So to get the best results we want to eliminate as many sources of bias that we can so lets go through the answers
A: A: A random sample of 1000 people from 10 local clothing stores. This is bias because if we choose from people shopping at a store they might like to shop more than usual
B: A random sample of 1000 people from his city. This can't possibly represent all the people in the U.S. because the sample is only from his city so we can't choose this answer
C: A random sample of people from his state. Again this doesn't represent the U.S. and also we don't have a number for the sample size
D. D: A random sample of 1000 people from each of the 50 states. This answer is good because we have a sample size, its random, and it represents the 50 states
a backyard garden has an area of 6.59 square meters. how many square centimeters is this? express your answer in scientific notation and to three significant figures.
There are 65900 square centimetres present in a backyard garden that has an area of 6.59 square meters.
Scientific notation is the way through which a very small or a very large number can be written in shorthand. In scientific notations when a number is between 1 and 10s, it is multiplied by a power of 10.
For example, 6,500,000,000,000 can be written as 6.5 × 10¹².
To calculate a square meter value to the related value in cm², just multiply the quantity in m² by 10000 (the conversion factor). Here is the formula for it:
Value in cm² = value in m² × 10000
We need to convert 6.59 m² into cm². Using the conversion formula above, we will get:
Value in cm² = 6.59 × 10000 = 65900 cm²
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I need help asap pls
Answer:
x = 5
Step-by-step explanation:
the 2 legs are congruent ( indicated by the double dash through both ), so
2x = 10 ( divide both sifes by 2 )
x = 5
Armando used algebra tiles to represent the product 3 x (2 x minus 1). an algebra tile configuration. 3 tiles are in the factor 1 spot and are labeled x. 3 tiles are in the factor 2 spot: 2 are labeled x and 1 is labeled negative. 15 tiles are in the product spot: 2 are labeled x squared, 4 are labeled x, 1 is labeled negative x, and 4 are labeled negative. which is true regarding armando’s use of algebra tiles?
The correct powers of x are not displayed in several of the goods.
What is algebraic tiles?Algebra tiles are mathematical manipulatives that help pupils better comprehend algebraic thinking and its ideas. These tiles have shown to give beginning algebra pupils in elementary, middle, high, and college concrete models.
How do algebraic tiles function?Blocks called algebra tiles can be used to symbolize constant, linear, and quadratic terms. Small yellow squares stand in for constant blocks, green rectangles for linear blocks, blue squares for quadratic blocks, and red squares for negative sides for all other types of blocks.
Future:
The image shows,
3x(2x - 1) = 6x² - 3x
This should be the appropriate representation on the tile:
_____+x _____ +x _____ +x
+x _ +x² ______+x² ______+x²
|
+x__ +x² _____ +x² ______+x²
|
- __ -x ______ -x _______-x
+6x² - 3x
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Select all of the expressions that are equivalent
to 18x+6.
Answer:
6(3x+1)
To check
6×3x=18x
6×1=+6
Answer:
1st, 2nd, 5th
Step-by-step explanation:
Please give me BRAINLIEST and THANKS lol
That passes through (-4,0) and is parallel to y= -2x+1
Answer:
y = -2x - 8
Step-by-step explanation:
Parallel lines always have the same slope. Here, it is -2.
So, our equation so far looks like this:
y = -2x + b, where b is the y-intercept
We need to find b. We know our line passes through (-4, 0), so let's plug -4 in for x and 0 in for y:
y = -2x + b
0 = -2 * (-4) + b
0 = 8 + b
b = -8
Since b = -8, our equation is thus y = -2x - 8.
~ an aesthetics lover
Find the volume of the figure below.
The volume of the figure, which is a rectangular pyramid, would be C. 90 km ³
How to find the volume of a rectangular pyramid?To find the volume of a rectangular pyramid, the formula is:
= ( Length of base x Width of base x Height of rectangular pyramid )
Length of base = 6 km
Width of base = 5 km
Height of rectangular pyramid = 3 km
The volume is therefore :
= 6 x 5 x 3 km
= 30 x 3 km
= 90 km ³
In conclusion, the volume of the figure is 90 km ³.
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An integer is chosen at Random from the first 100 positive integers. What is the probability that the integer chosen is exactly divisible by 7?
The probability of choosing an integer at random from the first 100 positive integers that is exactly divisible by 7 is 7/50.
The probability of choosing an integer from the first 100 positive integers that is exactly divisible by 7 can be calculated by determining the number of integers in the range that are divisible by 7 and dividing it by the total number of integers in the range.
To find the number of integers between 1 and 100 that are divisible by 7, we need to find the largest multiple of 7 that is less than or equal to 100.
By dividing 100 by 7, we get 14 with a remainder of 2. This means that the largest multiple of 7 less than or equal to 100 is 14 * 7 = 98.
So, there are 14 integers between 1 and 100 that are divisible by 7 (7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98).
Now, we can calculate the probability by dividing the number of integers divisible by 7 (14) by the total number of integers in the range (100).
Probability = Number of favorable outcomes / Total number of outcomes
Probability = 14 / 100
Simplifying the fraction, we get:
Probability = 7 / 50
Therefore, the probability of choosing an integer at random from the first 100 positive integers that is exactly divisible by 7 is 7/50.
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What is the perimeter of the trapezoid shown?
The given trapezium has a perimeter of 8 units.
What is a perimeter?The total distance encircling the perimeter of a two-dimensional geometric object is known as the perimeter.
It is the total length of the shape's sides and edges.
Depending on the measurement system employed, the perimeter is typically measured in length units such as centimeters, meters, feet, or inches.
Since AB || CD, we have ∠ADC = ∠BCD = 180° - ∠DAB - ∠CBA = 60°.
Consider E be the point of intersection of AD and BC. Then, triangle ADE and triangle BCE are equilateral triangles, since all their angles are
60° and all their sides are equal in length to 2. Therefore, AE = DE = BE = CE = 2.
Now, consider triangle CDE. We can apply the Law of Cosines to find the length of CD:
CD² = CE² + DE² - 2(CE)(DE)cos(60°) = 4 + 4 - 4 = 4
So, CD = 2.
Since AB is parallel to CD, triangle ABE is similar to triangle CDE. Therefore, we can use the proportion of corresponding sides to find the
length of AB:
AB/CD = AE/CE
AB/2 = 2/2
AB = 2
Finally, the perimeter of the trapezoid is:
AB + BC + CD + AD = 2 + 2 + 2 + 2 = 8
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I need this by tonight would be appreciated. :) I know this is basic stuff I'm in Middle School but when I signed up for this there wasn't a middle school option.
The area of the floor of the convenience store would be = 212.5 ft²
What is the area of an object?The area of an object is defined as the total space that is being occupied by that object.
To calculate the area of the convenience store is to find the area of the shaded part which would be = area of square - area of the triangle.
Area of square = l ×w = 15 × 15 = 225ft²
Area of triangle= 1/2 base ×height
= 1/2 × 5 × 5
(Note: 15 - 10 = 5 ft from the diagram used as base and height)
= 25/2
= 12.5 ft²
The area of the convenience store;
= 225 - 12.5
= 212.5 ft².
Therefore, the area that is covered by the convenience store should be = 212.5ft².
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3. Estimate √131 by finding what integers it falls
between. What integer is it closer to? Put all
three numbers on the number line to show
approximately where it would fall.
Answer:
this number falls between 11 and 12
Step-by-step explanation:
11 Squared is 121 and 12 squared is 144. 131 is between these numbers. It is closer to 11
AREA of circles pls help
Answer:
50.24cm2
Step-by-step explanation:
pi=3.14 so a=3.14x4square which equals 50.24cm2
For the following questions, please answer with a plot and a sentence or two written response given the structure in the plot.
Is there an association between students most identifying as an entrepreneur and their optimism for cryptocurrency?
Is there an association between students most identifying as a humanist and their optimism for cryptocurrency?
Propose your own question involving one or two variables and answer it using a plot with a written interpretation.
Propose your own question involving two or three variables and answer it using a plot with a written interpretation.
Plot:
The x-axis represents the level of identification as an entrepreneur (ranging from low to high), while the y-axis represents the level of optimism for cryptocurrency (ranging from low to high).
The plot shows a scatterplot of data points, with each point representing a student. The color of the points indicates the degree of association between the two variables, with darker points representing a stronger association.
Response:
The scatterplot reveals a positive association between students who identify strongly as entrepreneurs and their optimism for cryptocurrency. As the level of identification as an entrepreneur increases, so does the level of optimism for cryptocurrency. This suggests that students with an entrepreneurial mindset are more likely to view cryptocurrency as a promising and potentially lucrative investment or technological innovation.
Question 2: Is there an association between students most identifying as a humanist and their optimism for cryptocurrency?
Plot:
The x-axis represents the level of identification as a humanist (ranging from low to high), while the y-axis represents the level of optimism for cryptocurrency (ranging from low to high). The plot shows a scatterplot of data points, with each point representing a student. The color of the points indicates the degree of association between the two variables, with darker points representing a stronger association.
Response:
The scatterplot suggests a weak or no association between students who identify strongly as humanists and their optimism for cryptocurrency. The data points are scattered randomly across the plot, indicating that there is no clear pattern or relationship between the two variables. This implies that a student's identification as a humanist does not significantly influence their optimism or pessimism towards cryptocurrency.
Proposed Question 1: Is there a relationship between daily coffee consumption and productivity at work?
Plot:
The x-axis represents the number of cups of coffee consumed per day (ranging from 0 to 5+ cups), while the y-axis represents the level of productivity at work (ranging from low to high). The plot shows a line graph depicting the average productivity level for each level of coffee consumption.
Response:
The line graph demonstrates a positive relationship between daily coffee consumption and productivity at work. As the number of cups of coffee consumed per day increases, there is a gradual improvement in productivity. However, beyond a certain threshold (around 4-5 cups), the productivity gains level off or may even decline, indicating a diminishing return. This suggests that moderate coffee consumption can enhance productivity, but excessive consumption may lead to diminishing returns or negative effects on performance.
Proposed Question 2: How does income level and education level influence homeownership rates?
Plot:
The x-axis represents income level (ranging from low to high), the y-axis represents education level (ranging from low to high), and the z-axis represents the homeownership rate (ranging from low to high). The plot shows a 3D surface or contour plot illustrating the relationship between income, education, and homeownership rates.
Response:
The 3D plot reveals that both income level and education level have a strong positive influence on homeownership rates. As income level and education level increase, the homeownership rates also increase. The plot shows a gradual upward trend, indicating that higher income and education levels are associated with higher homeownership rates. This suggests that higher socioeconomic status, as represented by income and education, plays a significant role in facilitating homeownership.
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Ms. Patel drove 165 miles in 3 hours. If she continues driving at the same speed, how many miles will Ms. Patel drive in 7 hours? *
Answer:
i think the answer is 385
Step-by-step explanation:
I'm only in seventh grade i might be wrong but if you divide 165 by three it's 55 so 55 x 7 is 385.
Help me please :>>>>>
Answer:
B, D
Step-by-step explanation:
A study is done to determine the attitudes of male university students towards careers. The researcher interviews 100 of the male students enrolled in a first-year course at the university. What is the sample in this situation?
all university students
male university students
the male students taking this course
the 100 male students interviewed
Answer:
I need the answer
Step-by-step explanation:
Answer:
Step-by-step explanation:
The sample is the part of the population that somebody wants to study. therefore, the sample is the 100 male students interviewed
la+xl/2 - la-xl/2, if a= -2, x= -6
HELP!!!
Answer: 2
Step-by-step explanation:
1) substitute
2) calculate the difference before the absolute value
3) calculate the absolute value
4) convert into whole numbers/reduce
5) subtract the whole numbers
this is what i think might be wrong
For a biology assignment, Karen records the height of a plant over time. The
plant was 12 cm tall when she started the assignment. She notices that the
plant grows 6 cm every week.
Which point is on her graph?
A. (36, 4)
B.(3, 24)
C.(3, 32)
D.(1, 12)
Answer:
The answer is (4,36)
Step-by-step explanation:
Not sure if you have A switched around but it is 4,36.
Answer:
on the final exam its 2,24
Step-by-step explanation:
Anyone please answer me ,
Please solve this question
Answer:
67
Step-by-step explanation:
Multi-Inscribed Quadrilateral: 15
Bananas: 4
Clock: 3
Therefore, we can substitute for the last equation the values, so it would become:
3 + 4 + 4 x 15 = ?
First, we solve the multiplication according to PEMDAS.
4 x 15 = 60
Then, we can add from left to right.
3 + 4 + 60 = ?
3 + 4 = 7
7 + 60 = 67
Therefore, our answer would be 67.
Answer:
\(15 + 15 + 15 = 45 \\ 4 + 4 + 15 \: \: \: \: = 23 \\ 4 + 3 + 3 = 10 \\ 3 + 4 + 4 \times 11 = 51\)(according to BODMAS)
Step-by-step explanation:
First divide 45 by three
\(45 \div 3 = 15\)
then subtract 15 from 23 and divide that answer by 2
\(23 - 15 = 8 \\ 8 \div 2 = 4\)
Now subtract 4 from 10 and then divide that answer by 2
\(10 - 4 = 6 \\ 6 \div 2 = 3\)
Now add 3+4+4*11 you will get the answer for ?
\(3 + 4 + 4 \times 11\)
3 + 4 + 44
7 + 44
= 51
hope this helps
brainliest appreciated
good luck! have a nice day!
Please I need helppppppp
Answer:
Step-by-step explanation:
The conversion factor is 454 grams / pound. That makes the answer D.
All of the answers have the right digits. It's the number of zeros that cause the problem.
Answer:
450 grams is the closest metric weight of 1 pound which in actuality is 453.592 gram.
If two events, A and B, never occur at the same time they are _____.
compound
disjoint
complementary
simple
Answer:
They are disjoint.
Calculating the Number of Periods [LO4] You expect to receive $39,000 at graduation in two years. You plan on investing it at 10 percent until you have $174,000. How long will you wait from now? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Period years
You would need to wait approximately 51.33 years from now to grow your initial investment of $39,000 to $174,000 at an interest rate of 10% per year.
To calculate the number of periods (years) required to grow an initial investment to a desired future value, we can use the formula for compound interest:
FV = PV * \((1 + r)^n\)
Where:
FV is the future value
PV is the present value (initial investment)
r is the interest rate per period
n is the number of periods
In this case:
PV = $39,000
FV = $174,000
r = 10% per year
Let's calculate the number of periods (years):
FV = PV * \((1 + r)^n\)
174,000 = 39,000 * \((1 + 0.10)^n\)
Divide both sides by 39,000:
4.4615 = \((1.10)^n\)
Take the logarithm of both sides to solve for n:
log(4.4615) = n * log(1.10)
n ≈ log(4.4615) / log(1.10)
n ≈ 2.1270 / 0.0414
n ≈ 51.33 (rounded to two decimal places)
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what is the theoretical probability ?
Answer:
Theoretical probability is probability that is determined on the basis of reasoning. Experimental probability is probability that is determined on the basis of the results of an experiment repeated many times.
Step-by-step explanation:
If two line are perpendicular which statement is true
Question is in the images
Not all need to be used!
The two column proof is completed by
Statement Justification
1. DE || KL 1. Given
2. < DFE ≅ < LF-K 2. Vertical Angles Theorem
3. < DEF ≅ < LKF 3. Alternate Interior Angles Theorem
4. Δ FDE ≅ Δ FLK 4. AAS postulate
What is AAS postulate?According to the AAS Postulate, triangles are congruent if two angles and the non-included side of one triangle are congruent with two angles and the non-included side of another triangle.
In the given problem the side is non included and the angels are congruent and hence completes the proof
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i kneed help plsssssssssssssssssss
Answer:
2 2/5 or 12/5 (if u want it in improper fraction) but both works!
Step-by-step explanation:
Answer: 2 2/5
Step-by-step explanation: 9/5 has to have the same denominator as 6/10 so it becomes 18/10 and subtracting a negative number makes it addition so 18/10 + 6/10 is 24/10 and you simplify it to become 2 2/5
5. Find the perimeter and area
*Triangle- based prism*
Step-by-step explanation:
for the perimeter you have to say two brackets live plus height plus with plastic
suppose sin(A)=-0.78. use the trig identity sin^2(A)+cos^2(A)=1 and the trig identity tan(A) = sin(A)/cos(A) to find tan(A) in quadrant IV. round to the ten-thousandth.
a. -0.2039
b. 1.3941
c. 0.8671
d. -1.2464
In quadrant IV, \(\cos(A)\) is positive. So
\(\sin^2(A) + \cos^2(A) = 1 \implies \cos(A) = \sqrt{1-\sin^2(A)} \approx 0.6258\)
Then by the definition of tangent,
\(\tan(A) = \dfrac{\sin(A)}{\cos(A)} \approx \dfrac{-0.78}{0.6258} \approx \boxed{-1.2465}\)
How many circles are drawn?
we can draw in finite number circle from one point. so there are n number of possibility to draw circle from on given single point.
what is circle?
Every point in the plane that is a certain distance away from a certain point forms a circle (center). It is, thus, a curve formed by points moving in the plane at a fixed distance from a point. A circle is a closed two-dimensional object where every pair of points in the plane are equally spaced out from the "center." A line that goes through the circle creates a specular symmetry line. At every angle, it is also rotationally symmetric about the center.
Area of circle =
\(\pi r^2\\r = 10\\A = 3.14 X 20 X 20\\A = 628unit sq\\\)
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Se puede pasar 11/20 a fraccion mixta?
The fraction 11/20 can not be converted to a mixed fraction since it belongs to the proper fraction, I mean that the numerator is less than the denominator.
Only improper fractions can be mixed.
Example :\(\: \: \: \: \: \: \: \: \qquad\bold{\Rightarrow \dfrac{20}{11}= 1\dfrac{9}{11} }\)
So no the fraction 11/20 cannot be a mixed fraction.
Answer:
Solve the set of two reals for the following exponential equation:
\Large\text{${\dfrac{27^x\:-\:3^x}{9^x\:-\:3^x} = 82}$}
Mrs Tan spent 5 days to make a total of 35 lanterns. Each day, she makes 2 more lanterns than the day before. How many lanterns did she make on the 4th day?
Answer:
9
Step-by-step explanation:
we could use a way of guess
like first our number bases could be
1,2,3
for 1 , 1+3+5+7+9=25
2= 2+4+6+8+10+12=30
3= 3+5+7+9+11=35
so we find answer it is 9
i hope that could help you