is it ever appropriate to reach a causal conclusion from data collected in a scientific study that showed a statistically significant effect?

Answer:36.36%

Step-by-step explanation:

%change=100 X (final-inital value) divided by initial

Answer: 18) (9x)° + 45° = 180°-45°= 135° then we isolate the variable and the answer is 9x/9 which is equal to x = 15°.

Step-by-step explanation: 18) supplementary angles add up to 180 degrees. So a supplementary angle lies on a single, straight line

Step-by-step explanation:

-2,10 is the answer according to my working

The expression that results when the change of base formula is applied to log4(x+2) is log(x+2) / log(4).

1- Apply the change of base formula to log(x + 2):

log(x + 2) = log(x + 2) / log(10)

2- Apply the change of base formula to log(4):

log(4) = log(4) / log(10)

3- Rewrite the original expression, substituting the step 1 and step 2 results:

log(x + 2) / log(4) = (log(x + 2) / log(10)) / (log(4) / log(10))

4- Simplify by multiplying the numerator and denominator by the reciprocal of log(10):

log(x + 2) / log(4) = (log(x + 2) / log(10)) * (log(10) / log(4))

5- Cancel out log(10) in the numerator and denominator so we get:

     = log(x + 2) / log(4)

Therefore, the expression resulting from applying the change of base formula to log4(x + 2) is log(x + 2) / log(4).

You can learn more about change of base formula at

https://brainly.com/question/30237855

#SPJ11

Answer:

No

Step-by-step explanation:

This depends on many other things but in a basic tax bracket, both Joses and Mark both fall under the 12% tax bracket. This is for individuals who make a yearly salary between $9,876 to $40,125, in which the taxes would be 12% of the yearly salary. Since this is percent based, their taxes would not be the same, they would be close but Mark would still end up paying a little bit more since he made more money.

Step-by-step explanation:

10. a1=3, a2=1, a3=3, a4=1, a5=3

11. a3=2x1=2, a4=2x2=4, a5=4x2=8

hope that helps :)

Answer:

387.50.

Step-by-step explanation:

(a) The main theorem states that the sum of terms in the given sequence satisfies the equation n(n+1)/2 for various values of n.

(b) The induction step theorem for n = 64 states that if the main theorem holds for n = k, it also holds for n = k + 1.

(c) The induction step theorem for n = 583 states that if the main theorem holds for n = k, it also holds for n = k + 1.

(d) The induction step theorem for n = N states that if the main theorem holds for n = k, it also holds for n = k + 1.

(e) The combination of the induction step in (d) and verification of base cases in (a) completes the proof of the main theorem for all positive integers.

(a) The main theorem states that for any positive integer n, the sum of the terms k=1 to n of the sequence n(n+1)/2 is equal to n(n+1)/2.

Illustrating the main theorem for different values of n:

For n = 1: The sum is 1(1+1)/2 = 1, which holds true.

For n = 2: The sum is 2(2+1)/2 = 3, which holds true.

For n = 3: The sum is 3(3+1)/2 = 6, which holds true.

For n = 4: The sum is 4(4+1)/2 = 10, which holds true.

For n = 5: The sum is 5(5+1)/2 = 15, which holds true.

For n = 6: The sum is 6(6+1)/2 = 21, which holds true.

For n = 7: The sum is 7(7+1)/2 = 28, which holds true.

(b) The Induction Step Theorem for n = 64 states that if the main theorem holds for n = k, then it also holds for n = k + 1.

To prove it, assume that the main theorem holds for n = k, i.e., the sum of k terms is k(k+1)/2.

Then, we need to show that the sum of (k+1) terms is (k+1)((k+1)+1)/2 = (k+1)(k+2)/2.

By adding the (k+1)th term to the sum of k terms, we get (k(k+1)/2) + (k+1) = (k+1)(k+2)/2, which is the desired result.

(c) The Induction Step Theorem for n = 583 states that if the main theorem holds for n = k, then it also holds for n = k + 1.

To prove it, assume that the main theorem holds for n = k, i.e., the sum of k terms is k(k+1)/2.

Then, we need to show that the sum of (k+1) terms is (k+1)((k+1)+1)/2 = (k+1)(k+2)/2.

By adding the (k+1)th term to the sum of k terms, we get (k(k+1)/2) + (k+1) = (k+1)(k+2)/2, which is the desired result.

(d) The Induction Step Theorem for n = N states that if the main theorem holds for n = k, then it also holds for n = k + 1.

To prove it, assume that the main theorem holds for n = k, i.e., the sum of k terms is k(k+1)/2.

Then, we need to show that the sum of (k+1) terms is (k+1)((k+1)+1)/2 = (k+1)(k+2)/2.

By adding the (k+1)th term to the sum of k terms, we get (k(k+1)/2) + (k+1) = (k+1)(k+2)/2, which is the desired result.

(e) The proof of the induction step in (d) combined with the verification of several base cases in (a) completes the proof of the Main Theorem because it establishes that the theorem holds for all positive integers. The induction step shows that if the theorem holds for any positive integer, it also holds for the next integer. By verifying the base cases, we ensure that the theorem holds for the initial integers. Therefore, by the principle of mathematical induction, the theorem holds for all positive integers.

To learn more about principle of mathematical induction visit : https://brainly.com/question/29503103

#SPJ11

Answer:

(3)

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

u start at (0,9.5) and with every increasing x value the y value is decreasing by .5 units

(i) A complete residue system is described as to  a set of integers that shows  all possible remainders when dividing any integer by a given modulus.

(ii) A primitive root is described as an integer that generates all possible residues modulo a given modulus.

When primitive roots exist, it is often very convenient to use them in proofs and explicit constructions.

Say for example, if p is an odd prime and g is a primitive root mod p, the quadratic residues mod p are precisely the even powers of the primitive root.

Primitive roots also  finds numerous  applications in number theory, cryptography, and discrete mathematics.

Learn  ore about Primitive roots  at:

https://brainly.com/question/31849218

#SPJ4

my normal routine except i go to church

Answer:

1)  regular price ⇒ $X

Sale price:75,24

Regular price: 100, X

2) The Ratio of the numbers in the first column equals the to ratio

of numbers in the second one

so.. [tex]\frac{75}{124}=\frac{100}{x} \\[/tex]

X=100 ×24/75

X=$32

Regular price-sale price=32-24=$8

hope it helps...

Answer:

1/4 or 25%

Step-by-step explanation:

Theres a 1/4 chance of it landing on red.

Answer:

they be correct

Step-by-step explanation:

Answer: I BELIVE it’s 60

Step-by-step explanation:

Answer:

Not sure, but technically 9y

Step-by-step explanation:

find the average of the lengths. 12 and 6 average 9 together. Then, you multiply it by the height.

NOTE: It is not 1 or 2, because you can't use those to calculate the area.

Answer:

Suppose we add up alternate Fibonacci numbers, Fn-1 + Fn+1; that is, what do ... L(1)=1 and L(3)= 4 so their sum is 5 whereas F(2)=1; L(2)=3 and L(4)= 7 so their ... What is the relationship between F(n-2), and F(n+2)? You should be able to find a ... Fib(N); K (an EVEN number!), Lucas(K) and Fib(K) in each expression like ...

i

Step-by-step explanation:

The coordinates that represent the same point are: (3, 5π/4) and (-3, 3π/4); and (-3, 5π/2) and (-3, 3π/2). Explanation:We know that in the coordinate system, there is a point represented by (x,y) where x is the horizontal position and y is the vertical position.

Here in the question, we are given with some coordinates and we need to match the pairs that represent the same point. So, Let's check each pair given:(3, 5π/4) and (-3, 3π/4): Here, x coordinates are not same but we need to check whether they represent the same point or not. If we check the angles associated with each coordinate, we will notice that 5π/4 and 3π/4 are coterminal angles.

So, they both lie on the same position and thus represents the same point. Hence, this pair represents the same point.(-3, 5π/2) and (-3, 3π/2): Here, x coordinates are same, so they are representing the same point.

But we need to check whether y-coordinates also represents the same point or not. If we check the angles associated with each coordinate, we will notice that 5π/2 and 3π/2 are coterminal angles. So, they both lie on the same position and thus represents the same point. Hence, this pair represents the same point.

For more questions on: coordinate

https://brainly.com/question/31293074

#SPJ8

Answer:

Step-by-step explanation:

volume of cone formula: V = 1/3 πr²h

r = 1/2 d

r = 1/2 (17.5)

r = 8.75 in

V = 1/3 (π8.75²)(18.5)

V = 1483.26 in²

a. The replacement free cash flows is $255,000

b.  The Payback Period time required to recover the initial investment is 2.7778 years.

d. By calculating the NPV at various discount rates, we can determine the rate at which NPV is closest to zero.

a. To calculate the replacement free cash flows, we need to consider the cash flows associated with the new fleet of trucks. Here's the calculation:

Initial cash outflow: Purchase cost of new trucks + Shipping cost

= $350,000 + $50,000

= $400,000

Annual cash flows:

Operating cost savings:

Diesel fuel savings: $250,000 - $150,000 = $100,000

Maintenance cost savings: $35,000 - $10,000 = $25,000

Net operating working capital reduction: $20,000

Total operating cost savings per year: $100,000 + $25,000 + $20,000 = $145,000

Revenue increase:

Revenue growth rate: 10%

Year 1 revenue increase: $800,000 * 10% = $80,000

Year 2 revenue increase: $800,000 * 10% = $80,000

Year 3 revenue increase: $800,000 * 10% = $80,000

Year 4 revenue increase: $800,000 * 10% = $80,000

Year 5 revenue increase: $800,000 * 10% = $80,000

Salvage value: Market value of the new trucks at the end of 5 years = $30,000

Free cash flows:

Year 0: Initial cash outflow = -$400,000

Year 1: Cash flow = Operating cost savings + Revenue increase = $145,000 + $80,000 = $225,000

Year 2: Cash flow = Operating cost savings + Revenue increase = $145,000 + $80,000 = $225,000

Year 3: Cash flow = Operating cost savings + Revenue increase = $145,000 + $80,000 = $225,000

Year 4: Cash flow = Operating cost savings + Revenue increase = $145,000 + $80,000 = $225,000

Year 5: Cash flow = Operating cost savings + Revenue increase + Salvage value = $145,000 + $80,000 + $30,000 = $255,000

b. The Payback Period is the time required to recover the initial investment. To calculate it, we sum the cash flows until they equal or exceed the initial investment. Here's the calculation:

Payback Period = Number of years to recover initial investment

= 2 years (Year 1 cash flow + Year 2 cash flow)

+ (Remaining investment / Year 3 cash flow)

= 2 years + ($400,000 - $225,000) / $225,000

= 2 years + 0.7778 years

= 2.7778 years

c. To calculate the Net Present Value (NPV) and Profitability Index (PI), we need to discount the cash flows using the given discount rate of 15%. Here's the calculation:

Discount rate: 15%

Present value factor for each year:

Year 0: 1 / (1 + Discount rate)^0 = 1

Year 1: 1 / (1 + Discount rate)^1 = 0.8696

Year 2: 1 / (1 + Discount rate)^2 = 0.7561

Year 3: 1 / (1 + Discount rate)^3 = 0.6575

Year 4: 1 / (1 + Discount rate)^4 = 0.5718

Year 5: 1 / (1 + Discount rate)^5 = 0.4972

NPV calculation:

NPV = (Year 0 cash flow) + (Year 1 cash flow * Present value factor) + (Year 2 cash flow * Present value factor) + ...

= -$400,000 + ($225,000 * 0.8696) + ($225,000 * 0.7561) + ($225,000 * 0.6575) + ($225,000 * 0.5718) + ($255,000 * 0.4972)

Profitability Index calculation:

PI = NPV / Initial investment

= NPV / $400,000

d. To calculate the Internal Rate of Return (IRR), we find the discount rate that makes the NPV equal to zero. Here's the calculation:

IRR = Discount rate that makes NPV equal to zero

By calculating the NPV at various discount rates, we can determine the rate at which NPV is closest to zero.

e. Based on the information provided, we can determine if the fleet should be replaced by considering the Payback Period, NPV, Profitability Index, and IRR.

If the Payback Period is within the company's acceptable timeframe and the NPV is positive, or the Profitability Index is greater than 1, and the IRR exceeds the company's required rate of return, then replacing the fleet would be financially favorable. If any of these criteria are not met, it would indicate that the replacement may not be the best option.

Please note that the calculation of IRR requires further information, and the final decision should consider additional factors such as qualitative aspects, operational requirements, and strategic considerations.

Without the specific values for cash flows in each year, it is not possible to provide a definitive answer to whether the fleet should be replaced based on the given information.

To learn more about Profitability Index

https://brainly.com/question/30924864

#SPJ11

The double asterisk operator (**) is used to raise the radius to the power of 3, which represents r³ in the formula.

To compute the volume of a sphere, the given formula is used. It is: volume of a sphere = (4.0 / 3.0) πr³ where r is the radius of the sphere.

Therefore, to find the volume of the sphere given the sphere_radius and pi, the formula above is used, as shown below: sphere_volume = (4.0 / 3.0) * pi * sphere_radius**3

where sphere_radius is the given radius of the sphere and pi is the constant pi.

The double asterisk operator (**) is used to raise the radius to the power of 3, which represents r³ in the formula.

Pi (π) is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. It is an irrational number, which means it cannot be expressed as a simple fraction or as a finite decimal. The decimal representation of pi goes on infinitely without repeating.

The value of pi is approximately 3.14159, but it is typically rounded to 3.14 for simplicity in calculations. However, to maintain accuracy, mathematicians and scientists often use more decimal places, such as 3.14159265359, depending on the level of precision required for their calculations.

Visit here to learn more about radius brainly.com/question/31744314

#SPJ11

Full question:

Given sphere_radius and pi, compute the volume of a sphere and assign to sphere_volume. Volume of sphere = (4.0 / 3.0) π r3

The measure of angle 8 is 118°, and the measure of the angle opposite to it, angle 6, is 62°.

If lines v and w are parallel and angle 1 (denoted as <1) measures 62°, then angle 8 (denoted as <8) is supplementary to <1 (since they are corresponding angles on the same side of the transversal line) and thus measures 180 - 62 = 118°.

When two straight lines are cut by a transversal line, corresponding angles on the same side of the transversal are equal. Therefore, <8 and <1 are equal in measure. By transitivity, <8 is also equal in measure to the angle that is opposite it and adjacent to <1, which we could denote as <6.

We can apply the same reasoning to find the measure of angle 6. Since line v is parallel to line w, angle 6 and angle 1 are alternate interior angles, and thus are equal in measure. Therefore, <6 also measures 62°, and this is the measure of the angle opposite to angle 8.

For such more questions on angle

https://brainly.com/question/31512239

#SPJ8

a) The probability that 15 to 20 (inclusive) of the donors are Rh-negative is 0.5406.

b) The probability that more than 80 of the donors are Rh-positive is 0.0199.

(a) Given that p = 0.18 and q = 0.82

The mean, μ = np = 95 × 0.18 = 17.1

The variance, σ² = npq = 95 × 0.18 × 0.82 = 13.77

Then, the standard deviation σ = √(npq) = √13.77 ≈ 3.71

Using the Normal approximation for binomial distribution, we need to find the probabilities of P(X ≤ 20) and P(X ≤ 14).

P(X ≤ 20) = P(Z ≤ (20 - μ) / σ) = P(Z ≤ (20 - 17.1) / 3.71) = P(Z ≤ 0.78) = 0.7823P(X ≤ 14) = P(Z ≤ (14 - μ) / σ) = P(Z ≤ (14 - 17.1) / 3.71) = P(Z ≤ -0.84) = 0.2005

The required probability is given by;

P(15 ≤ X ≤ 20) = P(X ≤ 20) - P(X ≤ 14) = 0.7823 - 0.2005 = 0.5406

Therefore, the probability that 15 to 20 (inclusive) of the donors are Rh-negative is 0.5406.

b) We are required to find the probability that X > 80.Given that p = 0.82 and q = 0.18

The mean, μ = np = 95 × 0.82 = 77.9

The variance, σ² = npq = 95 × 0.82 × 0.18 = 13.77

Then, the standard deviation σ = √(npq) = √13.77 ≈ 3.71P(X > 80) = P(Z > (80 - μ) / σ) = P(Z > (80 - 77.9) / 3.71) = P(Z > 0.57) = 0.2843

The probability that more than 80 of the donors are Rh-positive is 0.0199.

Learn more about probability at:

https://brainly.com/question/15570919

#SPJ11

Answer:

We can be 95% confident that wind speed decreases, on average, between 1.20 knots and 1.42 knots for each millibar increase in minimum pressure.

Step-by-step explanation:

The computed confidence interval for a certain statistical parameter gives a range of value represented by a minimum value and a maximum value. The α value upon which the value was calculated represents the probability of the estimated value containing the true value of the parameter in question.

The minimum and maximum values represents the range of possible slope parameters, the true value falls in between two negative values, thus we have a negative slope, depicting a decline in one variable and the as the other increases.

From the options above, the most appropriate option is ;

We can be 95% confident that wind speed decreases, on average, between 1.20 knots and 1.42 knots for each millibar increase in minimum pressure.

Answer:

104

Step-by-step explanation:

:)

Answer:

c

Step-by-step explanation:

Answer:

234

Step-by-step explanation:

Simplify the expression. an=5n-16. Substitute 50 for n. 5(50)-16= 250-16=234

For problems like this, simplifying the equation helps.

Answer: 2.43m^3

Step-by-step explanation:

Answer: 2.43cm^3

Step-by-step explanation:

PLEASE mark me BRAINIEST! One more until next ranking!

Answer:

y=-1/2x+4 Is your answer

Step-by-step explanation:

y=mx+b

3=2x+4

-1=2x

x=-1/2

You already know y is 4 so y=-1/2x+4