Answer:
1/225
Step-by-step explanation:
A 2020 study showed that the presence of male pattern baldness and a severe reaction to COVID-19 had a strong association, so some suggested that having male pattern baldness might somehow cause a person to have a severe reaction to COVID-19 (since they had been bald before catching COVID-19, so that the disease could not have caused their baldness). Which option below was most likely a lurking variable?
Age
Diet
Height
Weight
Age is the most likely lurking variable in this scenario.
What is height?Height is a measure of how tall or high something is, typically referring to the distance from the bottom to the top of an object or the distance between a surface and the top of an object above it. Height can be measured in various units such as meters, feet, or inches. For example, the height of a person, a building, or a mountain can be measured in meters or feet.
Given by the question: -
As people age, they are more likely to experience male pattern baldness, and they are also at higher risk of severe illness from COVID-19. Therefore, the association between male pattern baldness and severe COVID-19 may be due to age rather than any direct causal link between baldness and COVID-19 severity. It is important to account for potential lurking variables in any study to avoid drawing incorrect conclusions about causation.
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is 3/64 rational or irrational?
Answer:
irrational because root3/root64=root3/
Step-by-step explanation:
Irrational probally I’m guessing my brother!
Jordan went to shelter to adopt a dog. There were 10 brown dogs and 10 black dogs. Jordan picked a dog, went home, then decided he wanted to go back and adopt another dog. What is the probability that he picked two black dogs?
Answer:
The probability is less likely and 2/20
Please mark me as brainliest.
10/38 is what i think it is
A simple random sample of 500 elements generates a sample proportion p= 0.81. Provide the 90% confidence interval for the population proportion (to 4 decimals). b.Provide 95% the confidence interval for the population proportion (to 4 decimals).
a) The 90% confidence interval for the population proportion is approximately (0.7777, 0.8423).
b) The 95% confidence interval for the population proportion is approximately (0.7737, 0.8463).
To calculate the confidence intervals for the population proportion, we can use the formula:
Confidence Interval = sample proportion ± margin of error
The margin of error can be calculated using the formula:
Margin of Error = critical value * standard error
where the critical value is determined based on the desired confidence level and the standard error is calculated as:
Standard Error = \(\sqrt{((p * (1 - p)) / n)}\)
Given that the sample proportion (p) is 0.81 and the sample size (n) is 500, we can calculate the confidence intervals.
a. 90% Confidence Interval:
To find the critical value for a 90% confidence interval, we need to determine the z-score associated with the desired confidence level. The z-score can be found using a standard normal distribution table or calculator. For a 90% confidence level, the critical value is approximately 1.645.
Margin of Error = \(1.645 * \sqrt{(0.81 * (1 - 0.81)) / 500)}\)
≈ 0.0323
Confidence Interval = 0.81 ± 0.0323
≈ (0.7777, 0.8423)
Therefore, the 90% confidence interval for the population proportion is approximately (0.7777, 0.8423).
b. 95% Confidence Interval:
For a 95% confidence level, the critical value is approximately 1.96.
Margin of Error = \(1.96 * \sqrt{(0.81 * (1 - 0.81)) / 500)}\)
≈ 0.0363
Confidence Interval = 0.81 ± 0.0363
≈ (0.7737, 0.8463)
Thus, the 95% confidence interval for the population proportion is approximately (0.7737, 0.8463).
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How many solutions does the equation have? 4h + 2 = 3h - 7
Answer:
1 solution
Step-by-step explanation:
4h + 2 = 3h - 7
Subtract 3h from both sides:
(4h + 2) - 3h = (3h - 7) - 3h
h + 2 = -7
Then, subtract 2 from both sides to isolate h:
(h + 2) - 2 = (-7) - 2
h = -9
There is one solution, -9.
The exterior angle of a certain regular polygon is 60°. How many sides does the polygon have?.
Work Shown:
E = exterior angle = 60 degrees
n = number of sides of the regular polygon
n = 360/E
n = 360/60
n = 6
The regular polygon has 6 sides.
Finding Angle Measures When Parallel Lines Are Cut By a Transversal
Answer:
<8, <1, <4 are all 96
<6,<7,<3, <2 are all 84
Step-by-step explanation:
7 1/2 divided by 3/4
Plz write it for me how u got it ❤️On paper then send it to me
Answer:
See below in bold.
Step-by-step explanation:
1. x^2 - 13x - 30
We need 2 numbers whose product is -30 and whose sum = -13.
They are -15 and + 2:
Answer is (x - 15)(x + 2).
2. 2x^2 + 4x - 126
First we can take 2 out to give:
2(x^2 + 2x - 63)
Now we need 2 numbers whose product is - 63 and sum = +2.
These are +9 and - 7 so
Answer is 2(x - 7)(x + 9).
3. -30x^3 + 3x^2 + 9x
First we can take out -3x to give
-3x(10x^2 - x - 3)
Now we want 2 numbers whose product is 10*-3 = -30 and whose sum is -1. They are -6 and +5 so we write the above as:
-3x(10x^2 + 5x - 6x - 3)
Now we factor the parentheses by grouping:
= -3x( 5x(2x + 1) - 3(2x + 1)
= -3x(2x + 1)(5x - 3) Answer.
The answer to the second part is 12x^2 - 13x - 21.
Part 3
1, 18.
2. 6.
3. = 5(2(-3)^2 - 3*3*4 + 4^2) - 3)) - 2(-3)(-3 + 7(4) - 1) - 3*4^2
= 5*(67) - 2(72) - 48
= 143.
4. (11m^2 - 7) - (6m^2 + 3m - 11) + (3m^2 - m - 9)
= 11m^2 - 7 - 6m^2 - 3m + 11 + 3m^2 - m - 9
= 8m^2 - 4m - 5
A = 8, B = 4 and C = 5.
A rock climber is standing at the edge of a cliff looking down into a valley and sees a lion laying 120 feet from
the base of the cliff. The angle of depression of the rock climber to the lion is 35º. How high is the cliff in feet?
Does anyone know???? (im writing this to get to 20 letters)
Answer:
x > 17
Step-by-step explanation:
Given equation:
2(x - 6) + 7 > 3x - 4(x + 8)
2x - 12 + 7 > 3x - 4x + 32 ^ Distributive Property
2x - 19 > -1x + 32 ^ Combine like-terms
3x - 19 > 32
3x > 51
x > 17
GRAPH:
17
O-------------------->
X is anywhere after O
The histogram gives information about the waiting time
Answer:
what historian
what was the information
Marcie cooked dinner for herself. The original recipe has a serving size of 3 and requires three and three sevenths pounds of chicken. How many pounds of chicken will be needed for a single serving?
one and one seventh pounds
nine and three sevenths pounds
two over 49 pounds
three sevenths pounds
Using proportions, the number of pounds that will be needed for a single serving is: one and three seventh pounds.
What is a proportion?A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct(when both increase or both decrease) or inverse proportional(when one increases and the other decreases, or vice versa), can be built to find the desired measures in the problem, or equations to find these measures.
The number of pounds for 3 people is given by:
\(3 \frac{3}{7} = 3 + \frac{3}{7} = \frac{24}{7}\)
Hence, for one person, the number of pounds can be divided by three(multiplied by 1/3), hence:
\(\frac{24}{7} \times \frac{1}{3} = \frac{24}{21}\)
24 divided by 21 has a quotient of 1 and remainder of 3, hence as a mixed number, the amount is:
one and three seventh pounds.
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Answer:
Step-by-step explanation:
the awnser is cerrot.
What are the 3 linear functions?.
Answer:
point-slope form, standard form, and slope-intercept form
Step-by-step explanation:
The three main types of linear functions are: point-slope form, standard form, and slope-intercept form.
Here is an image with each form
the length of a rectangular piece of sheet metal is longer than its width. a square piece that measures on each side is cut from each corner, then the sides are turned up to make a box with volume . find the length and width of the original piece of sheet metal.
The width of the original piece of sheet metal is (w^2 - l^2)/(3w + 3l), and the length is (l^2 - w^2)/(3w + 3l).
To solve this problem, we can use the formula for the volume of a rectangular box, which is V = lwh, where l is the length, w is the width, and h is the height.
First, let's find the height of the box. Since we cut squares from each corner, the height of the box is the length of the square that was cut out. Let's call this length x.
The width of the box is the original width minus the lengths of the two squares that were cut out, which is w - 2x.
Similarly, the length of the box is the original length minus the lengths of the two squares that were cut out, which is l - 2x.
Now we can write the volume of the box in terms of x, w, and l:
V = (w - 2x)(l - 2x)(x)
Expanding this expression, we get:
V = x(4wl - 4wx - 4lx + 8x^2)
Simplifying further:
V = 4x^3 - 4wx^2 - 4lx^2 + 4wlx
To find the dimensions of the original piece of sheet metal, we need to maximize this volume. We can do this by taking the derivative of the volume with respect to x and setting it equal to zero:
dV/dx = 12x^2 - 8wx - 8lx + 4wl = 0
Solving for x, we get:
x = (2wl)/(3w + 3l)
Now we can use this value of x to find the width and length of the original piece of sheet metal:
w - 2x = w - 2(2wl)/(3w + 3l) = (w^2 - l^2)/(3w + 3l)
l - 2x = l - 2(2wl)/(3w + 3l) = (l^2 - w^2)/(3w + 3l)
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billers and coders do not usually get involved with parts c and d of medicare. they primarily focus on parts a and b.
Correct, the primary focus of billers and coders is on Parts A and B of Medicare as these are the parts that cover hospital and medical insurance.
Parts C and D are not usually involved with billers and coders, as they involve providing medical insurance coverage for beneficiaries. Part C, also known as Medicare Advantage, is a type of private health insurance plan that is offered by a Medicare-approved private insurance company. Part D is the prescription drug coverage part of Medicare. While billers and coders may have some knowledge about Parts C and D, their main focus is on billing and coding for the services covered under Parts A and B.
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Jason wants to earn at least $250 each week working during the
summer.
Jason earns $6. 00 an hour babysitting.
Jason earns $7. 75 an hour working at a store.
He can work no more than 40 hours each week.
Let b equal hours of babysitting, and s equal hours working at the
store.
Which system of inequalities models the constraints?
O 6. 00b + 7. 755 2 250
b +5 s 40
O 6. 00b + 7. 75s 250
b +5 s 40
O 6. 000 + 7. 75s 40
b + s 250
O 6. 00b + 7. 75s 2 40
b + s 250
Answer:
The correct system of inequalities that models the constraints is:
6.00b + 7.75s ≥ 250
b + s ≤ 40
Explanation:
The first inequality represents the requirement that Jason needs to earn at least $250 each week. The earnings from babysitting are $6.00 per hour, and the earnings from working at the store are $7.75 per hour.
Therefore, the total earnings from both jobs can be represented by the expression 6.00b + 7.75s. This expression must be greater than or equal to $250, hence the first inequality.
The second inequality represents the constraint that Jason can work no more than 40 hours each week. The variables b and s represent the number of hours worked babysitting and working at the store, respectively.
The sum of these hours must be less than or equal to 40, hence the second inequality.
Therefore, the correct system of inequalities is:
6.00b + 7.75s ≥ 250
b + s ≤ 40
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It is known that the weights of male Persian cats are normally distributed with mean and variance 0.5^2 kg^2.(a) Sketch a diagram showing the above information. [2](b) Find the proportion of male Persian cats weighing between 5.5 kg and 6.5 kg . [2] A group of 80 male Persian cats are drawn from this population.(c) Determine the expected number of cats in this group that have a weight of less than 5.3kg. [3](d) It is found that 12 of the cats weigh more than xkg . Estimate the value of x. [3](e) Ten of the cats are chosen at random. Find the probability that exactly one of them weighs over 6.25 kg . [4]
(a) Here is a sketch of the normal distribution for the weights of male Persian cats:
```
|
|
|
|
|
|
| . . . . . . . . . . . . . . . . . . . . . .
| . .
| . .
|. .
--------------------|----------------------------------------------------
μ-3σ μ μ+3σ
```
The x-axis represents the weights of the cats, and the y-axis represents the probability density. The curve is symmetric around the mean (μ) and has a standard deviation (σ) of 0.5 kg.
(b) To find the proportion of male Persian cats weighing between 5.5 kg and 6.5 kg, we need to calculate the area under the normal distribution curve between these two weights.
Using statistical software or tables for the normal distribution, we can find the corresponding z-scores for the weights 5.5 kg and 6.5 kg. Let's assume these z-scores are z1 and z2, respectively.
Then, we can find the proportion by subtracting the cumulative probability for z2 from the cumulative probability for z1. This represents the proportion of cats within the weight range.
(c) To determine the expected number of cats in the group that have a weight of less than 5.3 kg, we first need to find the z-score corresponding to this weight. Let's assume this z-score is z3.
Next, we calculate the cumulative probability for z3. This represents the proportion of cats in the population with a weight less than 5.3 kg.
To find the expected number of cats in the group, we multiply this proportion by the total number of cats in the group (80).
(d) To estimate the value of x for the statement "12 of the cats weigh more than x kg," we need to find the z-score corresponding to the cumulative probability of 12 cats in a group of 80.
Using statistical software or tables for the normal distribution, we can find the z-score that corresponds to this cumulative probability.
Then, we can convert the z-score back to the weight scale to estimate the value of x.
(e) To find the probability that exactly one cat out of ten weighs over 6.25 kg, we can use the binomial probability formula:
\(P(X = 1) = (nCk) * p^k * (1-p)^{(n-k)}\)
In this case, n = 10 (number of cats chosen), k = 1 (number of cats weighing over 6.25 kg), and p represents the probability of a cat weighing over 6.25 kg, which can be calculated using the normal distribution and the corresponding z-score.
By substituting these values into the formula, we can calculate the probability.
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6. Find \( f \) given \( f^{\prime \prime}(x)=5 x^{3}+6 x^{2}+2 ; f(0)=3 ; \quad f(1)=-2 \).
The function f(x) that satisfies the given conditions is f(x)=1/5 x⁵ + 1/2 x⁴ + x² -49/10x +3.
To find f given f'' (x)=5x³ +6x² +2 and the initial conditions f(0)=3 and f(1)=−2, we can integrate the given differential equation twice.
Let's start by integrating f''(x) with respect to x to find f'(x).
f'(x)=∫(5x³+6x²+2)dx
Integrating term by term, we get:
f'(x)=5/4 x⁴ + 2x³ + 2x + c₁
Now integrating f'(x) with respect to x to find f(x).
f(x) = ∫5/4 x⁴ + 2x³ + 2x + c₁
=1/5 x⁵ + 1/2 x⁴ + x² + c₁x + c₂
Using the initial condition f(0)=3, we can substitute x=0 and f(0)=3 into the equation above:
c₂ = 3
Now, using the second initial condition f(1)=−2, we substitute x=1 and f(1)=−2 into the equation:
-2 = 1/5 + 1/2 + 1+ c₁ + c₂
-2=8/10 + 5/10 + 10/10 + c₁ + 3
c₁= -49/10
Therefore, the function f(x) that satisfies the given conditions is: f(x)=1/5 x⁵ + 1/2 x⁴ + x² -49/10x +3.
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Suggest regular languages L1 and L2 over {0,1} such that 1. L1⊈L2, 2. L2L1, and 3. (L1∪L2)∗=L1∗∪L2∗ (b) Prove or disprove whether condition 3 above holds for any regular languages, L1 and L2.
a). We have proved all the given conditions.
b). It is true that condition 3 holds for all regular languages L1 and L2.
(a) Regular languages L1 and L2 can be suggested as follows:
Let \(L_1={0^{(n+1)} | n\geq 0}\)
and
\(L_2={1^{(n+1)} | n\geq 0}\)
We have to prove three conditions:1. L1 ⊈ L2:
The given languages L1 and L2 both are regular but L1 does not contain any string that starts with 1.
Therefore, L1 and L2 are distinct.2. L2 L1:
The given languages L1 and L2 both are regular but L2 does not contain any string that starts with 0.
Therefore, L2 and L1 are distinct.3. (L1 ∪ L2)* = L1* ∪ L2*:
For proving this condition, we need to prove two things:
First, we need to prove that (L1 ∪ L2)* ⊆ L1* ∪ L2*.
It is clear that every string in L1* or L2* belongs to (L1 ∪ L2)*.
Thus, we have L1* ⊆ (L1 ∪ L2)* and L2* ⊆ (L1 ∪ L2)*.
Therefore, L1* ∪ L2* ⊆ (L1 ∪ L2)*.
Second, we need to prove that L1* ∪ L2* ⊆ (L1 ∪ L2)*.
Every string that belongs to L1* or L2* also belongs to (L1 ∪ L2)*.
Thus, we have L1* ∪ L2* ⊆ (L1 ∪ L2)*.
Therefore, (L1 ∪ L2)* = L1* ∪ L2*.
Therefore, we have proved all the given conditions.
(b)It is true that condition 3 holds for all regular languages L1 and L2.
This can be proved by using the fact that the union of regular languages is also a regular language and the Kleene star of a regular language is also a regular language.
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HELP ME ASAPPPP ITS ALGEBRA
Answer:
it is c
Step-by-step explanation:
i learned it last year
The length of a rectangle is 6 inches more than its width. The area of the rectangle is 16 inches. Which quadratic equation could you use to find the dimensions of the rectangle?
The dimensions of the rectangle L is 14 and w is -14 and 8
What are dimensions of the rectangle?There are two dimensions to a rectangle: the length and the width, which are measured in relation to the length. Oval and triangular interiors have only two dimensions. Although we don't think of these as having "length" or "height," they span a territory that is extensive in two directions in addition to the one we normally think of.The length, breadth, and height of a package are multiplied using the longest point on each side to determine the dimensional (DIM) weight. The dimensional weight in pounds is then determined by multiplying the package's cubic dimensions in inches by the DIM divisor.W*L = 112
L = W+6
Now, substitute L into the first equation and get it into standard quadratic form:
W(W+6) = 112
W2+6W-112 = 0
Factoring, we get:
(W+14)(W-8)
W = -14 and 8
Only one of these solutions makes sense as we can't have a negative value for length. So now we have:
8L = 112
L = 14
The complete question is,
The length of a rectangle is 6 inches longer than it is wide. If the area is 112 square inches, what are the dimensions of the rectangle?
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solve the equation c2 = 43
Hi there!
»»————- ★ ————-««
I believe your answer is:
\(c = \pm\sqrt{43}\)
»»————- ★ ————-««
Here’s why:
I am assuming that the two is an exponent.
⸻⸻⸻⸻
\(\boxed{\text{Solving for 'c'...}}\\\\c^2 = 43\\----------------\\\rightarrow \sqrt{c^2} = \sqrt{43}\\\\\rightarrow \boxed{c = \pm\sqrt{43}}}\)
⸻⸻⸻⸻
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.
Help me please thanks
Answer:
D. 8
Step-by-step explanation:
√16 is 4
√4 is 2
So 2 times 4 is 8.
Answer:
The answer is D. 8
Step-by-step explanation:
Find the least-squares regression line y^=b0+b1x through the points
(−2,2),(2,9),(5,13,(7,19),(10,24),
and then use it to find point estimates y^ corresponding to x=1 and x=7.
For x=1, y^ =
For x=7, y^ =
The point estimate for least-squares regression line x=1 is approximately 3.85, and the point estimate for x=7 is approximately 24.02.
What is coefficient of linear regression?In a linear regression, the coefficient of determination (R-squared) is a statistical indicator that shows how much of the variance in the dependent variable is explained by the independent variable (s). Higher values suggest a better fit of the regression line to the data, and it has a value between 0 and 1. R-squared is derived by dividing the regression's sum of squares (SSR) by the sum of all squares (SST).
The least-squares regression line is given by the formula:
b1 = Σ[(xi - x)(yi - y)] / Σ[(xi - x)²]
The means of x and y:
x = (−2 + 2 + 5 + 7 + 10) / 5 = 4.4
y = (2 + 9 + 13 + 19 + 24) / 5 = 13.4
Substituting the value we have:
Σ[(xi - x)(yi - y)] = (-2-4.4)(2-13.4) + (2-4.4)(9-13.4) + (5-4.4)(13-13.4) + (7-4.4)(19-13.4) + (10-4.4)(24-13.4) = 400.8
Σ[(xi - x)²] = (-2-4.4)²+ (2-4.4)² + (5-4.4)² + (7-4.4)² + (10-4.4)² = 86.8
Thus, the value of:
b1 = Σ[(xi - x)(yi - y)] / Σ[(xi - x)²] = 400.8 / 86.8 ≈ 4.617
Now, for y-intercept we have:
b0 = y - b1x = 13.4 - 4.617(4.4) ≈ -0.767
y = -0.767 + 4.617x
Now, the point estimate is:
For x=1, y = -0.767 + 4.617(1) ≈ 3.85
For x=7, y = -0.767 + 4.617(7) ≈ 24.02
Therefore, the point estimate for x=1 is approximately 3.85, and the point estimate for x=7 is approximately 24.02.
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Write 108:99:108 in its simplest form
Answer:
12 : 11 : 12
Step-by-step explanation:
First, you need to find the GCF (Greatest Common Factor) of the three numbers.
108 : 99 : 108
They are all divisible by 9
108/9 : 99/9 : 108/9
12 : 11 : 12
Hope this helps!
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PLS HELP ASAP(100 POINTS)
A linear function is shown on the graph.
A linear function beginning with open circle at negative 3 comma negative 5 and ending with an open circle at 3 comma 7.
What is the domain of the function?
{y | −5 ≤ y ≤ 7}
{y | −5 < y < 7}
{x | −3 ≤ x ≤ 3}
{x | −3 < x < 3}
Answer:
{x | −3 ≤ x ≤ 3
Answer:
{x | −3 ≤ x ≤ 3}
Step-by-step explanation:
pretty sure its right
What is the y-intercept of y = 3- 4x
Answer:
(0,3)
Step-by-step explanation:
Answer:0,3
Step-by-step explanation:
solve by substitution
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(−95,−615)(-95,-615)
Equation Form:
x=−95,y=−615x=-95,y=-615
my little brother needs help and my dad wont let me help him so im posting this for him HELP ASAP
Answer:
B- 19.84
Step-by-step explanation: