Please help me I don’t understand $!!!!!

A study comparing one group of participants who are randomly assigned to receive a drug with another group of participants who are randomly assigned to receive a placebo is called a randomized controlled trial (RCT).

The purpose of an RCT is to evaluate the effectiveness of a treatment or intervention by comparing it to a control group that receives a placebo or alternative treatment. This design is commonly used in clinical research to establish causal relationships between treatments and outcomes.

To know more about outcomes visit;

brainly.com/question/28740329

#SPJ11

Total area = 12 + 18 = 30cm²

Answer:

Area of the right angled triangle:-

= height × base ÷ 2

= 4 cm × 6 cm ÷ 2

= 4 cm × 3 cm

= 12 cm²

Area of the rectangle:-

= length × breadth

= 6 cm × 3 cm

= 18 cm²

Area of the figure:-

= 12 cm² + 18 cm²

= 30 cm²

Answer:

3.1% increase

Step-by-step explanation:

Diameter1=25cm

Radius1=12.5cm

Circumference1=2x22/7x12.5

Diameter2=25.8cm

Radius2=12.9cm

Circumference2=2x22/7x12.9

% increase =Circumference2-Circumference1/Circumference2 x 100%= 2x22/7x12.9-2x22/7x12.5 / 2x22/7x12.9 x100%

12.9-12.5/12.9 x 100%

0.4/12.9 x 100%

4/129 x 100%

3.1%

To factor an expression, we can identify common factors between each terms, and take them out.

117n + 90

Both terms have the common factor of 9. Factor this out:

= 9(13n + 10)

13 and 10 do not have a common factor. Therefore, this is the final factored expression.

9(13n + 10)

A demographer predicts that the population, P, of a town t years from now can be modeled by the function P(t) = 6t^4 - 5t^3 + 200t + 12000. What will the population of the town be two (2) years from now?

To calculate the population of the town be two (2) years from now, replace t into 2:

\( \dashrightarrow \sf{P(t) = 6t^4 - 5t^3 + 200t + 12 \: 000}\)

\(\sf\dashrightarrow \sf{P(2) = 6(2)^4 - 5(2)^3 + 200(2) + 12\:000}\)

\(\dashrightarrow \sf{P(2) = 6(16) - 5(8) + 200(2) + 12\:000}\)

\(\dashrightarrow \sf{P(2) = 96 - 40 + 400 + 12\:000}\)

\( \dashrightarrow\sf{P(2) = 56 + 400 + 12\:000}\)

\( \dashrightarrow\sf{P(2) = 456 + 12\:000}\)

\( \dashrightarrow\sf{P(2) = 12\:456}\)

If you would like to learn more about functions, kindly please take your time to visit this following links:

Answer:

x = 0

Step-by-step explanation:

-23 × 0 = 0

0 + 13 = 13

13 > -1

The coordinates of the point P on the directed line segment that partitions the segment into a ratio of 2 to 3 is the ordered pair (3, 0).

In this scenario, we would use line ratio to determine the coordinates of the point P on the directed line segment that partitions the segment into a ratio of 3 to 2.

In Mathematics, line ratio can be used to determine the coordinates of the point P and this is modeled by this mathematical expression:

P(x, y) = [(mx₂ + nx₁)/(m + n)],  [(my₂ + ny₁)/(m + n)]

Substituting the given parameters into the line ratio formula, we have;

P(x, y) = [(mx₂ + nx₁)/(m + n)],  [(my₂ + ny₁)/(m + n)]

P(x, y) = [(2(9) + 3(-1))/(2 + 3)],  [(2(6) + 3(-4))/(2 + 3)]

P(x, y) = [(18 - 3)/(5)],  [(12 - 12)/5]

P(x, y) = [15/5],  [0/5]

P(x, y) = [3, 0]

Read more on line ratio here: brainly.com/question/14457392

#SPJ1

Complete Question:

Find the coordinates of point P along the directed line segment AB so that AP to PB is the given ratio. A(-1, -4), B(9, 6); to 3. The coordinates of P are?

According to the question the equation of the line tangent to \(\( f(x) = x^5 \) when \( x = -2 \) is \( y = 80x + 128 \).\)

To find the equation of the line tangent to \(\( f(x) = x^5 \) when \( x = -2 \)\), we need to determine the slope of the tangent line at that point and use the point-slope form of a linear equation.

The derivative of \(\( f(x) \) is \( f'(x) = 5x^4 \).\)

Substituting \(\( x = -2 \)\) into the derivative, we get \(\( f'(-2) = 5(-2)^4 = 80 \).\)

The slope of the tangent line is 80, and we have the point \(\((-2, f(-2)) = (-2, (-2)^5) = (-2, -32)\).\)

Using the point-slope form, the equation of the tangent line is:

\(\[ y - (-32) = 80(x - (-2)) \]\)

Simplifying:

\(\[ y + 32 = 80(x + 2) \]\)

\(\[ y + 32 = 80x + 160 \]\)

\(\[ y = 80x + 128 \]\)

Therefore, the equation of the line tangent to \(\( f(x) = x^5 \) when \( x = -2 \) is \( y = 80x + 128 \).\)

To know more about tangent visit-

brainly.com/question/15065643

#SPJ11

According to the question the equation of the tangent line to y = 80x + 120.

To find the equation of the line tangent to, we need to determine the slope of the tangent line at that point and use the point-slope form of a linear equation.

\(\( f(x)=x^{5} \)\)

The derivative of

f'(x) = 5x⁴

Substituting  into the derivative, we get

f(-2) = x⁵ =  (-2)⁵ = -32

f'(-2) = 5(-2)⁴ = 80

The slope of the tangent line is 80, and we have the point

Using the point-slope form, the equation of the tangent line is:

y - f(x) = f'(x) (x + 2)

y = 80x + 120.

Therefore, the equation of the line tangent to y = 80x + 120.

Learn more about tangent visit:

https://brainly.com/question/28994498

#SPJ4

Weight of a 24 square foot, 2 inch thick aluminum plate will be: 720 lbs.

A single unit's value can be determined from the values of multiple units, and multiple units' values can be determined from the values of single units using the unitary method.

Given:

To find: weight of a 24 square foot, 2 inch thick aluminum plate

Finding:

By unitary method, we get:

Weight of 1 square foot aluminum plate = 15 lbs.

Weight of 24 square foot aluminum plate = 15(24) lbs = 360 lbs.

Again, by unitary method, we get:

Weight of 1 square foot, 1 inch thick aluminum plate = 15 lbs.

Weight of 24 square foot, 1 inch thick aluminum plate = 15(24) lbs = 360 lbs.

Weight of 24 square foot, 2 inch thick aluminum plate = 360(2) lbs = 720 lbs.

Hence, Weight of 24 square foot, 2 inch thick aluminum plate = 720 lbs.

To learn more about unitary method, refer to the link: https://brainly.com/question/24587372

#SPJ4

Answer:

Multiply to remove the fraction, then set equal to 0 and solve.

Exact Form: y = − 1/10

Decimal Form: y = − 0.1

Step-by-step explanation:

Answer:

y = -1/10 or -0.1

Step-by-step explanation:

Multiply both sides of the equation by 100.

To find the opposite of 5y−17, find the opposite of each term.

The opposite of −17 is 17.

Combine 155y and −5y to get 150y.

Subtract 17 from both sides.

Subtract 17 from 2 to get −15.

Divide both sides by 150.

​Reduce the fraction  

​ to lowest terms by extracting and canceling out 15.

Based on an 80% learning curve and the given information that the second plane took 20,000 hours to produce, the time required for the fourth unit is approximately 10,714 hours.

The learning curve concept suggests that as cumulative production doubles, the time required to produce each unit decreases by a certain percentage. In this case, the learning curve is 80%, meaning that the time required to produce each subsequent unit decreases by 20%.
To determine the time required for the fourth unit, we can use the learning curve formula:
Time for nth unit = Time for the first unit * (n^log(learning curve))
Given that the second plane took 20,000 hours to produce, we can use this information to calculate the time for the fourth unit:
Time for fourth unit = 20,000 * (4^log(0.8))
Evaluating the expression, we find that the time required for the fourth unit is approximately 10,714 hours.
Therefore, according to the 80% learning curve, the fourth unit would require approximately 10,714 hours to produce.

learn more about approximately here

https://brainly.com/question/31695967



#SPJ11

The exponential  equation that matches the coordinate is 3(2)^x while the linear equation is y = 6x

The standard exponential equation is expressed as y= ab^x

where

a is the base

x is the exponent

Given the coordinates (2, 12) and (4, 48)

12 = ab^2

48 = ab^4

Find the ratio

4 = b^2

b = 2

Sice ab^2 = 12

4a = 12

a = 3

The exponential  equation that matches the coordinate is 3(2)^x

For the linear equation

The standard form is y = mx + b

m is the slope = 48-12/4-2
Slope = 12/2

Slope = 6

For the y-intercept

12 = 6(2) + b

b = 0

Hence the required linear equation is. y = 6x

Learn more on exponential and linear equation here: https://brainly.com/question/2456547

#SPJ1

Answer:

need more info

Step-by-step explanation:

i need more information to answer this

Answer:

125 inches^3

Step-by-step explanation:

To solve for cubes it is L^3 or Length Cubed. Whcih is simply L×L×L where L is Length.

The expression that does not factor on the mentioned is m² + 1.

Because other expression can be factored, while m² + 1 has no factor form. For make it clear we can calculate to find the form expression and find the calculate power or result.

m³ + 1 =

m³ - 1 =

m² - 1 =

        and then it could be, m² - 1 = (m + 1)(m - 1).

Learn more about factored expression at: brainly.com/question/11994062

#SPJ4

The equation is represented as follows:

p^2 + 2pq + q^2 = 1

The Hardy-Weinberg equation is a mathematical formula used in genetics to predict the frequency of genetic traits in a population. The equation is named after the scientists G. H. Hardy and W. Weinberg, who independently developed it in 1908 and 1909, respectively.

The equation states that the frequency of a genetic trait in a population will remain constant over time as long as certain conditions are met. These conditions are:

No mutations occur in the gene responsible for the trait

There is no natural selection for or against the trait

There is random mating within the population

The population size is large

The Hardy-Weinberg equation can be used to calculate the frequency of the dominant and recessive alleles (versions of a gene) in a population, and the probability of different genotypes (the combination of alleles an individual has) and phenotypes (the physical expression of the trait) within that population.

Where p is the frequency of the dominant allele, q is the frequency of the recessive allele, and p^2 represents the proportion of homozygous dominant individuals, 2pq represents the proportion of heterozygous individuals and q^2 represents the proportion of homozygous recessive individuals.

The Hardy-Weinberg equation is a useful tool for understanding how genetic traits are inherited and how they change over time. It is widely used in population genetics, evolutionary biology and medical genetics.

It is also important to notice that the Hardy-Weinberg equilibrium is a theoretical concept that is rarely met in real populations due to the existence of genetic drift, migration, mutation, nonrandom mating and natural selection.

to know more about equation refer here

https://brainly.com/question/29657992#

#SPJ11

Step-by-step explanation:

To evaluate the expression 2(x^2-1)+4y when x=4 and y=3, we substitute x=4 and y=3 into the expression and simplify:

2(x^2-1)+4y

= 2(4^2-1)+4(3) (substitute x=4 and y=3)

= 2(16-1)+12

= 2(15)+12

= 30+12

= 42

Therefore, when x=4 and y=3, the value of the expression 2(x^2-1)+4y is 42.

Answer:

Below

Step-by-step explanation:

Remember for RIGHT triangle , Cos Z = adjacent leg / hypotenuse

cos z = 48/50 = 24/25

The best description about the sampling distribution of means for the student's sample is mu x = 45, sigma x = 3.75, shape of distribution unknown.

Sampling distribution is defined as the probability distribution of a statistical measure which is got by the repeated sampling of a specific population.

Given that,

μ = 45 minutes and σ = 15 minutes

Sampling distribution of means for the student's sample is :

μₓ = μ = 45

σₓ = σ / √n, where n is the sample size.

σₓ = 15 / √(16) = 15 / 4 = 3.75

Now since the sample size 16 which is less than 30, shape of the distribution is unknown.

Hence the sampling distribution is, μₓ = 45, σₓ = 3.75, and the shape of distribution is unknown.

Learn more about Sampling Distribution here :

https://brainly.com/question/14390195

#SPJ1

The single transformation which this student performed include the following: a reflection over the y-axis.

In Geometry, a reflection over or across the y-axis or line x = 0 is represented and modeled by this transformation rule (x, y) → (-x, y).

By applying a reflection over the y-axis to the coordinate of the given triangle PQR, we have the following coordinates:

(x, y)                             →                 (-x, y).

Coordinate P = (-1, 1)   →  Coordinate J' = (-(-1), 1) = (1, 1).

Coordinate Q = (-4, 1)   →  Coordinate K' = (-(-4), 1) = (4, 1).

Coordinate R = (-4, 4)   →  Coordinate L' = (-(-4), 4) = (4, 4).

Read more on reflection here: brainly.com/question/27912791

#SPJ1

The E(T) is 4 when A and B, two players, alternately toss a fair coin (A tosses the coin first, then B tosses the coin, then A, then B and so on).

Given that,

A and B, two players, alternately toss a fair coin (A tosses the coin first, then B tosses the coin, then A, then B and so on). The heads and tails are recorded in order. The game is over and the winner is the person who throws the tail if there is a head followed by a tail (HT sub-sequence).

We have to find what is the anticipated game length. Let the game continue for T number of coin tosses. Find E (T).

We know that,

Here,

E(T )=first time sequence HT occurs

E(T) = P(first H)× P(expected number till 1st T |first H)+ P(first T)× P(expected number till 1st HT |first T)

E(T) =0.5×(1+2)+0.5×(1+E(T))

0.5×E(T)=0.5×4

E(T) =4

Therefore, The E(T) is 4 when A and B, two players, alternately toss a fair coin (A tosses the coin first, then B tosses the coin, then A, then B and so on).

To learn more more about coin visit: https://brainly.com/question/5495713

#SPJ4

t + 7 = 21

---Subtract 7 from both sides

t + 7 - 7 = 21 - 7

t = 14

Hope this helps!! :)

Answer:

B) t = 14

Step-by-step explanation:

Jess will retire at about 41.98 years historic or round her forty second birthday.

To calculate how lengthy it will take for Jess's financial savings account to attain one million dollars, we can use the system for compound interest:

A = P(1 + r/n)(nt)

Where:

A = Total quantity (one million bucks in this case)

P = Principal quantity (initial credit score of $50,000)

r = Annual hobby price (9% as a decimal, so 0.09)

n = Number of instances the hobby is compounded per yr (in this case, compounded annually)

t = Number of years

Substituting the given values into the formula, we have:

1,000,000 = 50,000(1 + 0.09/1)(1t)

Simplifying:

20 = (1.09)t

To clear up for t, we want to take the logarithm of each aspects of the equation. Let's use the herbal logarithm (ln) for this calculation:

ln(20) = ln(1.09)t

Using the logarithmic property, we can go the exponent t in front:

ln(20) = t * ln(1.09)

Now we can remedy for t with the aid of dividing each aspects by using ln(1.09):

t = ln(20) / ln(1.09)

Using a calculator, we discover that t ≈ 19.98 (rounded to two decimal places).

Therefore,

It will take about 19.98 years to attain one million bucks in Jess's financial savings account.

To decide at what age Jess will retire, we add the time it takes to attain one million bucks to her preliminary age of 22:

Age at retirement = 22 + 19.98 ≈ 41.98

For similar question on historic:

https://brainly.com/question/32158745

#SPJ11

Considering the condition for an inverse function, it is found that the functions that also have an inverse for all values of x are given by:

B. F(x) = 2x + 3

C. F(x) = 3/2(x) + 2

D. F(x) = 2x^3 + 2

A function f(x) has an inverse if it does not have any horizontally aligned points, that is, if f(a) = f(b), then a = b.

Polynomial functions of even degrees have horizontally aligned points, hence functions A and E do not have inverses.

The other polynomial functions, with odd degrees, have inverses.

More can be learned about inverse functions at https://brainly.com/question/8824268

Answer:

The length of the piggy bank is 6 cubic inches long, and the height of the piggy bank is 8 cubic inches high. So next, you multiply 6 and 8 together, which is 48. Therefore, the volume of the piggy bank is 48 cubic inches^3.

Step-by-step explanation:

Answer:

x = 5

y = 15

Step-by-step explanation:

This is an isosceles triangle so angles ∠B and ∠C are congruent.

We can write the following equation to first find the value of x then the value of y:

5x = 25

x = 5

The sum of interior angles in a triangle is equal to 180°.

25 + 25 + 7y + 25 = 180

75 + 7y = 180

7y = 105

y = 15

Answer:

Step-by-step explanation:

You need to find out if the equation is linear or not. A linear equation will have a constant change. So as x increases by 1, y decreases by 1.25. You would check every line given and see if it continues the same. If so then it is a linear equation. Your slope is the rate of change, meaning how much does x and y increase or decrease. Your b is where the equation starts. You would find b at the top of the table. The first # on this is 0. 8 is your b. x is the input that is  multiplied to the slope to receive the output:y.