Null and alternative hypothesis: The null hypothesis is that the mean weight of the diabetics insured by two employers is similar.
In contrast, the alternative hypothesis is that the mean weight of the diabetics insured by two employers is not equal. Level of significance: The level of significance
(α) is the probability of rejecting the null hypothesis when it is valid. The commonly used level of significance is 0.05.
Test statistic: Assuming the population variances are equal, the test statistic is the t-distribution.
Decision Rule: Reject H0 if the t-value is greater than 2.060 or less than -2.060 and accept H0 if the t-value is between 2.060 and -2.060.
State Output: Assuming equal variances, the p-value associated with a two-tailed t-test for equality of means is 0.2682.Statistical decision: Since the p-value is greater than 0.05, we accept the null hypothesis and conclude that the mean weight of diabetics insured by the two employers is equal.
Conclusion: Therefore, there is no considerable difference in the mean weight of diabetics insured by two employers in the City of Asheville and Mission-St. Joseph’s Health System. Linear regression model and interpretation (if necessary): A linear regression model was not necessary in this study.
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You hear on the news that over the next 5 years the inflation rate will skyrocket to 12% if today a new blu-ray movie costs $19.99 assuming continuous compounding how much will the same disk cost in 5 years?
The Blu-ray movie will cost approximately $36.42 in 5 years with an inflation rate of 12% and continuous compounding.
To calculate the future cost of the Blu-ray movie in 5 years with an inflation rate of 12% and continuous compounding, we can use the formula for continuous compound interest:
A = P * e^(rt)
Where:
A = Future value
P = Present value
e = Euler's number (approximately 2.71828)
r = Annual interest rate (in decimal form)
t = Time period in years
In this case, the present value (P) is $19.99, the inflation rate (r) is 12% or 0.12, and the time period (t) is 5 years. Substituting these values into the formula, we get:
A = 19.99 * e^(0.12 * 5)
Calculating the exponent first:
0.12 * 5 = 0.6
Then:
e^0.6 ≈ 1.82212
Finally:
A = 19.99 * 1.82212 ≈ 36.42
Using the formula for continuous compound interest, we calculated that a Blu-ray movie that costs $19.99 today will cost approximately $36.42 in 5 years, assuming an inflation rate of 12% and continuous compounding.
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I think it is 40, but I need some make sure I am right
Answer:
40 is the answer I also got 40
Mary and Will rent a tandem bike for $10/hr. Which value is the
dependent variable? Which is the independent variable? Write an
equation to represent the relationship between the number of
hours, h, and the total cost, c.
Answer:
Step-by-step explanation:
c = 10h
h is the independent variable.
c is the dependent variable.
Please I need help please!
Answer:
3/2
Step-by-step explanation:
move all the variables to the left 0=2x-3
divide both sides -2x=-3
then your answer is 3/2
six times the sum of a number and 2 is -36
Step-by-step explanation:
six times the sum of a number and 2 is -36
Solution,
Let the number be x, then
6(x+2)=-36
6x+12=-36
6x=-36-12
6x=-48
x=-48/6
x=-8
I want to know if they are equivalent
Answer:
not equivalent
Step-by-step explanation:
You want to know if (x² +1) is equivalent to (2/3x² +1/3x² +1 +x).
SimplifiedThe second expression simplifies to ...
(2/3 +1/3)x² +x +1 = x² +x +1
This 3-term expression has an extra term that is not found in the first expression. The two expressions are not equivalent.
__
Additional comment
You can combine like terms (expressions with the same variables to the same powers), but you cannot combine unlike terms. The added x term in the second expression is what makes it not equivalent to the first expression.
Equivalent expressions have the same graph. These do not.
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Are the ones with answers correct? I just want to make sure I’m right
Answer:
yes just make sure to pay close attention
Factor the equation and show your work.
x^2 + 14x + 49
Answer: (x+7)(x+7), 7 plus 7 is 14 and 7 times 7 is 49
Evaluate the indefinite integral: -1 + C. (32*dz Hint: In WebWork, you write z with "abs(x)". ()
The answer is: ∫(-1)dz = -z + C
To evaluate the indefinite integral of -1 with respect to z, we need to find the antiderivative of -1. The antiderivative of -1 is -z. Since it's an indefinite integral, we should also include the constant of integration, C. Therefore, the answer is:
∫(-1)dz = -z + C
The process of finding the antiderivative of a function is known as integration. An indefinite integral is an integral that does not have any specific limits of integration. It is represented by the symbol "∫" and does not have any numerical value until a constant of integration is added.
In this case, we are asked to evaluate the indefinite integral of -1 with respect to z. To find the antiderivative of -1, we need to find a function whose derivative is -1. This is because the derivative and antiderivative are inverse operations.
The antiderivative of -1 is -z because the derivative of -z with respect to z is -1.
∫(-1)dz = -z + C
Where C is the constant of integration. It is important to include the constant of integration when finding the antiderivative because any constant value will have a derivative of 0. Therefore, adding the constant of integration ensures that all possible antiderivatives of a function are accounted for.
The result of the indefinite integral, -z + C, represents the set of all functions whose derivative is -1.
To check the answer, we can take the derivative of -z + C with respect to z:
d/dz(-z + C) = -1 + 0 = -1
This confirms that -z + C is indeed an antiderivative of -1.
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a cylinder has a radius of 5mm and a height of 8mm. what is the volume in terms of pi.
The volume of the given cylinder is 400π cubic millimeter.
Given that, a cylinder has a radius of 5 mm and a height of 8 mm.
We know that, the volume of a cylinder is πr²h.
Here, volume = π×5²×8
= π×25×8
= 400π
Therefore, the volume of the given cylinder is 400π cubic millimeter.
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Need help
What is the equation of a line that passes through the point (0, -2) and has a slope of -3?
y = -2
y = -2x - 3
y = -3x - 2
y = -3
Answer:
y = -3x - 2
Step-by-step explanation:
Since the line passes through the point (0, -2), -2 is the y-intercept
Using the slope-intercept form for a line we have
y = -3x - 2
Marie needs 2 1/4 yards of fabric
She already has 1 3/8 yards.
How many yards of fabric does she need
a
1/8 yard
b
3/4 yard
c
7/8 yard
d
1/4 yard
1 1/3 x 3/5 and simplify
Answer:
4/5
Step-by-step explanation:
1 1/3 = 4/3
4/3 x 3/5
times the denominator and numerator = 12/15
divide by HCF which is 3
4/5
Question 4 Three draws are made without replacement from a box containing 5 tickets; two of which are labeled "1", and one eac labeled, "2", "3" and "4" Find the probability of getting two "1's. 0.3 something else 0.4 0.288 0.16
The probability of getting two "1's" out of three draws without replacement from the box is 0.3, which matches the first option.
How to find the probability of getting three "1's" out of three draws?To find the probability of getting two "1's" out of three draws without replacement from a box containing 5 tickets, we can use the following steps:
Step 1: Determine the total number of possible ways to draw three tickets from the box without replacement. This can be calculated using the formula for combinations:
C(5, 3) = 5! / (3! * 2!) = 10
Step 2: Determine the number of ways to draw two "1's" and one other ticket. There are two "1's" in the box, so we can choose two of them in C(2, 2) = 1 way. The third ticket can be any of the remaining three tickets in the box, so we can choose it in C(3, 1) = 3 ways. Thus, there are 1 x 3 = 3 ways to draw two "1's" and one other ticket.
Step 3: Calculate the probability of getting two "1's" by dividing the number of ways to draw two "1's" and one other ticket by the total number of possible draws:
P(two "1's") = 3 / 10
Therefore, the probability of getting two "1's" out of three draws without replacement from the box is 0.3, which matches the first option.
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Write a method to approximate the area of a circle centered at
origin
with radius r. Note that you should forget the existence of
the well known formula area =
πr2.
The equation of a circles with r
The estimated area of the circle is then: Estimated area = 0.7 x 4r²= 2.8r²
To estimate the area of a circle with the center at origin and radius r, there are various methods you can use.
One of them is Monte Carlo Integration.
Monte Carlo Integration is a numerical technique used to calculate an estimate of an area by performing a probability simulation. In this case, the simulation involves generating a random sample of points within the circle, and then counting the number of points that lie within it.
Here is a simple method for using Monte Carlo Integration to estimate the area of a circle with center at origin and radius r:
Step 1: Create a square of side length 2r centered at the origin, with vertices (r, r), (r, -r), (-r, r), and (-r, -r). This square completely encloses the circle.
Step 2: Generate a large number of random points within the square, using a uniform distribution. For example, you could use a computer program to generate 10,000 random points with x and y coordinates between -r and r.
Step 3: Count the number of points that lie within the circle. To do this, you can use the Pythagorean theorem to check if each point is inside or outside the circle. If a point has coordinates (x, y), then it lies within the circle if x^2 + y^2 ≤ r^2.
Step 4: Estimate the area of the circle by multiplying the proportion of points that lie within the circle by the area of the square. The proportion of points that lie within the circle is equal to the number of points within the circle divided by the total number of points generated.
The area of the square is 4r^2.
The estimated area of the circle is then:
Estimated area = Proportion of points in circle x Area of square
= Number of points in circle / Total number of points x 4r²
For example, if 7,000 of the 10,000 random points lie within the circle, then the proportion of points within the circle is 0.7.
The estimated area of the circle is then:
Estimated area = 0.7 x 4r²
= 2.8r²
This method is easy to use, and it becomes more accurate as the number of random points generated increases.
For best results, you should generate at least 10,000 points.
The estimated area may not be precise like the known formula, but the result would be quite close to the actual area of the circle.
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What is the measure of angle 1?
90
Step-by-step explanation:
It's a right-angle triangle
Hope this helps!
In which choice do all three points lie on the same straight line?
A (0, 1), (–1, 3), (1, 3)
B (4, 2), (2, 1), (4, –2)
C (0, 0), (8, 0), (0, 8)
D (1, 2), (2, 4), (4, 8)
Answer:
D
Step-by-step explanation:
we'll use the complex number system to solve this exercice
the coordinates of the last triplet are : (1,2) , (2,4) and (4,8) The affixes are then
\(1 + 2i = a \\2 + 4i= b = 2a \\4+8i = c = 2b = 4a\)
for the points to be aligned the fraction \(\frac{c-a}{b-a}\) should be a real number
\(\frac{c-a}{b-a} = \frac{4a-a}{2a-a} = \frac{3a}{a} = 3\)
so the points are aligned
Answer:
D (1, 2), (2, 4), (4, 8)
Step-by-step explanation:
Hope this helps
A circle has a diameter of 10 inches. What is the circumference of the circle? (Write an exact answer using Pi)
Answer:
31.42 in
Step-by-step explanation:
C=πd=π·10≈31.41593in
Sarah scored an 8/10 on the spelling test and Jonathan scored 75% of Sarah’s score on the spelling test. What is the score of Jonathan?
\(\frac{3}{5}\) is the score of Jonathan.
What is percentage?Percentage, which may also be referred to as percent, is a fraction of a number out of 100%. Percentage means "per 100" and denotes a piece of a total amount.
To calculate the percentage , Use the percentage formula:
\(X * \frac{Percentage}{100} = Y\)
According to the question:
Sarah scored on the spelling test = \(\frac{8}{10}\)
Jonathan scored = 75%
By formulating both the values;
\(\frac{8}{10} * \frac{75}{100}\)
= \(\frac{3}{5}\)
Therefore , \(\frac{3}{5}\) is the score of Jonathan.
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plz help need to finish by 12:00 am
30.
\(g(x)=2x^2+18x-14\\\\a)\\g(9)=2\cdot9^2+18\cdot9-14=162+162-14=310\\\\b)\\ g(3x)=2(3x)^2+18(3x)-14=18x^2+54x-14\\\\c)\\ g(1+5m)=2(1+5m)^2+18(1+5m)-14=\\\\=2(1+10m+25m^2)+18+90m-14=2+20m+50m^2+4+90m=\\\\=50m^2+110m+6\)
31.
\(h(y)=-3y^3-6y+9\\\\a)\\h(4)=-3(4)^3-6(4)+9=-3\cdot64-24+9=-192-15=-207\\\\ b)\\h(-2y)=-3(-2y)^3-6(-2y)+9=24y^3+12y+9\\\\c)\\h(5b+3)=-3(5b+3)^3-6(5b+3)+9=\\\\=-3[(5b)^3+3\cdot(5b)^2\cdot3+3\cdot5b\cdot3^2+3^3)-30b-18+9=\\\\=-375b^3-675b^2-405b-81-30b-9=-375b^3-675b^2-435b-90\)
32.
\(f(t)=\dfrac{4t+11}{3t^2+5t+1}\\\\a)\\f(-6)=\dfrac{4(-6)+11}{3(-6)^2+5(-6)+1}=\dfrac{-24+11}{3(36)-30+1}=\dfrac{-13}{108-29}=-\dfrac{13}{79}\\\\b)\\f(4t)=\dfrac{4(4t)+11}{3(4t)^2+5(4t)+1}=\dfrac{16t+11}{48t^2+20t+1}\\\\c)\\f(3-2a)=\dfrac{4(3-2a)+11}{3(3-2a)^2+5(3-2a)+1}=\dfrac{12-8a+11}{3(9-12a+4a^2)+15-10a+1}=\\\\=\dfrac{-8a+23}{27-36a+12a^2+16-10a}=\dfrac{-8a+23}{12a^2-46a+43}\)
33.
\(g(x)=\dfrac{3x^3}{x^2+x-4}\\\\a)\\g(-2)=\dfrac{3(-2)^3}{(-2)^2+(-2)-4}=\dfrac{3(-8)}{4-2-4}=\dfrac{-24}{-2}=12\\\\b)\\g(5x)=\dfrac{3(5x)^3}{(5x)^2+(5x)-4}=\dfrac{3(125x^3)}{25x^2+5x-4}=\dfrac{375x^3}{25x^2+5x-4}\\\\c)\\g(8-4b)=\dfrac{3(8-4b)^3}{(8-4b)^2+(8-4b)-4}=\dfrac{3[8^3-3\cdot8^2\cdot4b+3\cdot8\cdot(4b)^2-(4b)^3]}{64-64b+16b^2+8-4b-4}=\\\\=\dfrac{3(512-768b+384b^2-64b^3)}{16b^2-68b+68}=\dfrac{3\cdot4(128-192b+96b^2-16b^3)}{4(4b^2-17b+17)}=\\\\=\dfrac{384-576b+288b^2-48b^3}{4b^2-17b+17}\)
find the critical value 0.10,5.value t0.10,5. (use decimal notation. give your answer to four decimal places.
The critical value t0.10,5 is approximately 1.4759.
To find the critical value t0.10,5 (also written as t(0.10,5)), you'll need to consult a t-distribution table. This critical value represents the t-score that has a probability of 0.10 (10%) in the upper tail of the distribution and 5 degrees of freedom.
Using a t-distribution table or a calculator, the critical value t0.10,5 is approximately 1.4759.
Your answer: The critical value t0.10,5 is approximately 1.4759.
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what does parallelepiped focus on
Answer:
A parallelepiped has three sets of four parallel edges; the edges within each set are of equal length. Parallelepipeds result from linear transformations of a cube (for the non-degenerate cases: the bijective linear transformations).
Step-by-step explanation:
A parallelepiped focuses on three-dimensional figures formed by six parallelograms.
How to explain the parallelepiped?A parallelepiped shape has the following features
They are three-dimensional figuresThey are formed by 6 parallelogramsOpposite parallelograms are congruentThink of a cube or a cuboid.
Notice that they contain squares and rectangles
A parallelepiped is to a parallelogram as a square is to a cube and a rectangle to a cuboid
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2/6 2/3 5/12 1/4 7/9 in ascending order
and
2/7 2/4 11/14 3/2 5/8 in also ascending order
Answer:
5/12 ,7/9 ,1/3 , 2/3, 1/4
2/7 ,2/4, 5/8, 11/4 ,3/2
Step-by-step explanation:
Round the number to 3
significant figures.
0.2590100
Answer:
0.259
Step-by-step explanation:
There are some rules in determining what numbers are significant figures.
All non-zero numbers are significant.Zeroes between two non-zero numbers are significant.Zeroes at the front of a number are not significant.Trailing zeroes are only significant if there is a decimal point.We can determine how many significant figures the number currently has.
The first zero is not significant.2, 5, 9, and 1 are significant because they are non-zero numbers.The zero between 9 and 1 is significant because it is a captive zero.The zeroes at the end of the number are significant because they are trailing zeroes.There are currently seven significant figures. In order to round the number to three significant figures, we must round it to the thousandths place, or the 9.
The rounding rules are:
If the digit in the place after the number we are rounding is less than 5, you round down (or in other words, keep the number the same; Ex: 74 becomes 70)If that digit is greater than 5, you round up (Ex: 78 becomes 80)Since 0 is less than 5, the number rounded to 3 significant figures is 0.259.
A box has the shape of a rectangular prism with height 33 cm. If the height is increased by 0.6 cm, by how much does the surface area of the box increase? Use pencil and paper. Show your work. Then show a second way to solve the problem. Explain which way you like better and why. 15 cm 6.3 cm The surface area increases by cm- 33cm. 6.3cm 15cm
The total increase in surface area is 189 cm², indicating that there has been a combined growth or expansion of surfaces by 189 square centimeters in the given context or scenario.
To find the increase in surface area of the box, we need to calculate the difference between the new surface area and the original surface area.
Let's calculate the original surface area:
Original surface area = 2(length × breadth + length × height + breadth × height)
= 2(15 cm × 6.3 cm + 15 cm × 33 cm + 6.3 cm × 33 cm)
= 2(94.5 cm² + 495 cm² + 207.9 cm²)
= 2(797.4 cm²)
= 1594.8 cm²
Now, let's calculate the new surface area when the height is increased by 0.6 cm:
New surface area = 2(15 cm × 6.3 cm + 15 cm × (33 cm + 0.6 cm) + 6.3 cm × (33 cm + 0.6 cm))
= 2(15 cm × 6.3 cm + 15 cm × 33.6 cm + 6.3 cm × 33.6 cm)
= 2(94.5 cm² + 501 cm² + 211.68 cm²)
= 2(807.18 cm²)
= 1614.36 cm²
Now, we can calculate the increase in surface area:
Increase in surface area = New surface area - Original surface area
= 1614.36 cm² - 1594.8 cm²
= 19.56 cm²
Second approach:
The increase in surface area can also be calculated by considering only the two faces affected by the change in height, which are the top and bottom faces of the box.
Each face has a length of 15 cm and a breadth of 6.3 cm. The increase in height is 0.6 cm.
The increase in surface area of one face = 15 cm × 6.3 cm
= 94.5 cm²
Since there are two faces (top and bottom), the total increase in surface area is:
Total increase in surface area = 2 × 94.5 cm²
= 189 cm²
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My oscillation has a frequency of 7 hertz. What is the period?
The period of the oscillation is 1/7 seconds
How to determine the period of the oscillation?From the question, we have the following statement that can be used in our computation:
Frequency = 7 hertz
The period of the oscillation is calculated as
Period =1/Frequency
Substitute the known values in the above equation, so, we have the following representation
Period =1/7
Hence, the period is 1/7
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A sample of bacteria taken from a river has an initial concentration of 2.1 million bacteria per milliliter and its concentration triples each week. (a) Find an exponential model that calculates the concentration after x weeks. (b) Estimate the concentration after 1.6 weeks. (a) B(x) = (Type an equation usingx as the variable.)
The exponential model that calculates the concentration of bacteria after x weeks can be represented by the equation B(x) = 2.1 million * (3^x), the concentration after 1.6 weeks would be approximately 14.87 million bacteria per milliliter.
This equation assumes that the concentration triples each week, starting from the initial concentration of 2.1 million bacteria per milliliter.
To estimate the concentration after 1.6 weeks, we can substitute x = 1.6 into the exponential model. B(1.6) = 2.1 million * (3^1.6) ≈ 14.87 million bacteria per milliliter. Therefore, after 1.6 weeks, the estimated concentration of bacteria in the river would be approximately 14.87 million bacteria per milliliter.
The exponential model B(x) = 2.1 million * (3^x) represents the concentration of bacteria after x weeks, where the concentration triples each week. By substituting x = 1.6 into the equation, we estimate that the concentration after 1.6 weeks would be approximately 14.87 million bacteria per milliliter.
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7) What does a multiplier of \( 1.2 \) mean?
A multiplier of 1.2 means the value is multiplied or increased by a factor of 1.2.
A multiplier is a term used to represent a factor by which a value is multiplied or increased. It is a numeric value that indicates the extent of the increase or expansion of a given quantity. Multiplication by a multiplier results in scaling or changing the magnitude of the original value.
A multiplier of 1.2 indicates that a value will be increased by 20% or multiplied by a factor of 1.2. This means that when the multiplier is applied to the original value, the resulting value will be 1.2 times the original.
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Find the Surface area of the trapezoid
please help
show work
Answer:
259.5
Step-by-step explanation:
8.1*12=97.2
Area of trapiezium = 1/2(b+a)h
(2.8+8.1)=10.9
10.9*3/2=16.35
16.35*2=32.7
2.8*12=33.6
33.6+32.7+97.2=163.5
4*12*2=96
163.5+96=259.5
help meeeeeeeeeeeeeee pleaseee
The table of solutions for this quadratic equation (y = -2x²) include the following:
x y_
-2 -8
-1 -2
0 -0
1 -2
2 -8
Also, a graph of the solution of this quadratic equation is shown in the image attached below.
How to determine the solution and plot the graph?In Mathematics, the valid and true solutions to the given quadratic equation (y = -2x²) are referred to as ordered pairs and they can be determined by substituting the x-values contained in the table into the quadratic equation as follows;
When x = -2, the y-value for this quadratic equation is given by:
y = -2x²
y = -2(-2)²
y = -2 × 4
y = -8
When x = -1, the y-value for this quadratic equation is given by:
y = -2x²
y = -2(-1)²
y = -2 × 1
y = -2
When x = 0, the y-value for this quadratic equation is given by:
y = -2x²
y = -2(0)²
y = -2 × 0
y = 0
When x = 1, the y-value for this quadratic equation is given by:
y = -2x²
y = -2(1)²
y = -2 × 1
y = -2
When x = 2, the y-value for this quadratic equation is given by:
y = -2x²
y = -2(2)²
y = -2 × 4
y = -8
In conclusion, you would notice that a graph of this quadratic equation is parabolic (u-shaped) in nature with a slope of -2.
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