people with acrophobia (fear of heights) sometimes enroll in therapy sessions to help them overcome this fear. typically, seven or eight therapy sessions are needed before improvement is noticed. a study was conducted to determine whether the drug d-cycloserine, used in combination with fewer therapy sessions, would help people with acrophobia overcome this fear. each of 27 people who participated in the study received a pill before each of two therapy sessions. seventeen of the 27 people were randomly assigned to receive a d-cycloserine pill, and the remaining 10 people received a placebo. after the two therapy sessions, none of the 27 people received additional pills or therapy. three months after the administration of the pills and the two therapy sessions, each of the 27 people was evaluated to see if he or she had improved. was this study an experiment or an observational study? provide an explanation to support your answer. when the data were analyzed, the d-cycloserine group showed statistically significantly more improvement than the placebo group did. based on this result, would the researchers be justified in concluding that the d-cycloserine pill and two therapy sessions are as beneficial as eight therapy sessions without the pill? justify your answer. a newspaper article that summarized the results of this study did not explain how it was determined which people received d-cycloserine and which received the placebo. suppose the researchers allowed the therapists to choose which people received d-cycloserine and which received the placebo, and no randomization was used. explain why such a method of assignment might lead to an incorrect conclusion.

At a constant speed of 45 miles per hour it will take 0.71 hours for Darla to run her errands and get back home.

What is constant speed?

An object is considered to be moving at a constant speed when it covers the same distance in the same amount of time. When moving at a constant pace, an object covers a certain distance in a fixed amount of time.

Darla drives at a constant speed of 45 miles per hour.

She drives for y miles and it takes her x hours.

The number of miles Darla can drive in x hours is y = 45x.

Darla drives to the market, 14 miles from her house.

Then she drives to the post office, 3 miles from the market.

Then she drives back to her house, 15 miles from the post office.

Calculate Darla's total distance travelled -

14 + 3 + 15 = 32 miles

Now, substituting the value of y with 32 -

32 = 45x

x = 32/45

x = 0.71

Therefore, the time taken by Darla is 0.71 hours.

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Answer: x > - 9 or x < - 26

Step-by-step explanation:

Ok, so modulus means that 0.2x + 3.5 is either greater than 1.7, or less than -1.7. Putting that in equation, we get,

0.2x + 3.5 > 1.7 or 0.2x + 3.5 < -1.7

0.2x > -1.8 or 0.2x < -5.2

x > -9 or x < -26

There u go.

Answer:

Step-by-step explanation:

a) To find u1, we can use the term-to-term rule given in the problem:

Un+1 = U²₁ + 5

We know that u1 = 1, so we can substitute that into the equation:

u2 = 1² + 5 = 1 + 5 = 6

b) To find u2, we can use the same term-to-term rule and substitute the value of u1 (which is 6) into the equation:

u3 = 6² + 5 = 36 + 5 = 41

c) To find un, we can use the term-to-term rule and substitute the value of un-1 into the equation.

un = un-1² + 5

It's important to note that the value of n is not given so we can't calculate the value of un.

Therefore, u1 = 6, u2 = 41, and we can't calculate un without knowing the value of n.

The volume of the three dimensional figure is 102π m³

An equation is an expression composed of variables and numbers linked together by mathematical operations.

Diameter = 6 m, radius = 6/2 = 3 m

Volume of hemisphere = (2/3) * π * radius³ = (2/3) * π * 3³ = 18π m³

Volume of cylinder = π * radius² * height = π * 3² * 8 = 72π m³

Volume of cone = (1/3) * π * radius² * height = (1/3) * π * 3² * 4 = 12π m³

Volume of solid = sum of all volumes = 18π m³ + 72π m³ + 12π m³ = 102π m³

The volume of the solid is 102π m³

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The volume of the figure is the sum volume of the cone, hemisphere and cylinder which is 320.4m²

To determine the volume of the figure, we have to find the volume of the hemisphere, the volume of the cylinder and the volume of the cone.

The formula of volume of a hemisphere is given as;

V = 2/3πr³

Substituting the values into the formula above;

v = 2/3(π) × 3³

v = 56.5m³

The formula of volume of a cylinder is given as

V = πr²h

Substituting the values into the formula

v = π * 3² * 8

v = 226.2m³

The formula of volume of a cone is given as;

v = 1/3πr²h

Substituting the values into the formula

v = 1/3 × π × 3² * 4

v = 37.7m³

The volume of the figure = volume of cone + volume of cylinder + volume of hemisphere

volume of figure = 56.5 + 226.2 + 37.7

volume of figure = 320.4m³

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The given expression 1 2/3+(-8 1/2) is equivalent to -41/6.

what are expressions?

Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between. The mathematical operators can be of addition, subtraction, multiplication, or division. For example, x + y is an expression, where x and y are terms having an addition operator in between. In math, there are two types of expressions, numerical expressions - that contain only numbers; and algebraic expressions- that contain both numbers and variables.

e.g. A number is 6 more than half the other number, and the other number is x. This statement is written as x/2 + 6 in a mathematical expression. Mathematical expressions are used to solve complicated puzzles.

Now,

Given expression is 1 2/3+(-8 1/2)

=5/3+(-17/2)

=5/3-17/2

Taking LCM 6

=(10-51)/6

=-41/6

Hence,

        The given expression 1 2/3+(-8 1/2) is equivalent to -41/6.

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Shaded picture where tree can be planted is attached below as per the scaling given.

The ratio between a distance on a map and its actual distance on the ground is known as the map's scale. Since scale must vary throughout a map due to the curvature of the Earth's surface, this straightforward idea is made more difficult. This change makes the idea of size significant in two different ways.

Given, Here is a scale drawing of a garden. The scale is 1 cm to 2m

A tree is going to be planted. The tree must be more than 4 m from the patio. The tree must be more than 6m from the pond.

Since Scale is 1: 200

Planted tree distance from Patio = 4 m = 400 cm

in picture = 400 *  1: 200

in picture, Planted tree distance from Patio= 2 cm

Planted tree distance from Ppnd = 6 m = 600 cm

in picture = 600 *  1: 200

in picture, Planted tree distance from Patio= 3 cm

Therefore, Shaded picture where tree can be planted is attached below as per the scaling given.

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Answer:

not a function

Step-by-step explanation:

for the mapping to be a function, each value of x (input ) must map to exactly one unique value of y ( output )

here 1 → 2 and 1 → - 2

- 5 → 4 and 5 → - 4

since the input for these values maps to 2 output values

Then the mapping is not a function

Answer:

(5n + 2.29n) + (5.82 + 7.67)

Step-by-step explanation:

The difference would be $61.60 in favor of the daily compounded scenario.

Compound interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods.

To calculate the difference between the two scenarios you have provided:

$1,000 compounded daily at 5% for 8 years would earn $1,472.11

$1,000 compounded semiannually at 5% for 8 years would earn $1,410.51

Hence, the difference would be $61.60 in favor of the daily compounded scenario.

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Answer:

Step-by-step explanation:

1

Answer:

Step-by-step explanation:

Let x be the number of tickets sold before the tournament.

The number of tickets sold on the day of the tournament is x - 150 (since 150 fewer tickets were purchased on the day of the tournament than before the tournament)

The total number of tickets sold is the sum of the number sold before the tournament and on the day of the tournament.

x + (x - 150) = 898

Combining like terms:

2x = 1048

To find the number of tickets sold on the day of the tournament, we need to divide by 2:

x = 1048/2

x = 524

Therefore, 524 tickets were sold before the tournament and x - 150 = 524 - 150 = 374 tickets were sold on the day of the tournament.

Answer:

c its the answer jus did it on edge 2022

Step-by-step explanation:

So, on solving the provided question, here we can say that the  by differential equation V = max volume = x = 8 and y = 4

Sequences in which the difference between succeeding terms is constant are known as arithmetic progressions. For instance, an arithmetic progression with a tolerance of 2 is the sequence 5, 7, 9, 11, 13, and so on. An arithmetic progression (A.P.) is a progression where the tolerance between two succeeding numbers is always the same. Arithmetic progression can be of two types: There are a finite number of terms in a finite geometric progression. The series' early, late, tolerance, and number of terms can be determined. Differential equations are frequently used in everyday life to compute the flow and motion of electricity, the back and forth motion of devices like pendulums, and to clarify thermodynamic principles.

Given x + Y 12

y = 12 - x

volume = [tex]\pi x^2y[/tex]

V = [tex]12\pi x^2 - \pi x^3[/tex]

Differentiate

dV/dx = [tex]24\pi x - 3x^2[/tex]

dV/dx  = 0; x = 0,8

V = max volume = x = 8 and y = 4

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No, it is not the same as receiving a 35% discount of all the $100 items.

A discount can be defined as the amount of money a seller deducts for their customers from the normal price of the products they are selling.

The percentage discount that is generally on products that are sold for the price of $100 = 35%

The additional discount Josh received were 25% and 10% which is a total of 35% which is different from the general discount.

Therefore, it is not the same as receiving a 35% discount of all the $100 items.

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Complete question:

Josh went into a store to buy a $100 item. There was a sale of 35% off all. The sales person gave Josh a 25% discount and then an additional merchandise.

10% discount. Is that the same as receiving a 35% discount? Prove your answer.

Assuming that each site is equally likely to be chosen, there are 1820 ways the sites for the new stores can be selected.

The department store chain is planning to expand into a new market and is considering 16 different sites on which to locate 4 stores. In order to determine the number of ways to select the sites for the new stores, we need to calculate the number of ways to select 4 sites from the 16 available sites. This can be done by using the binomial coefficient "16 choose 4" which is also written as,

16C4 = 16!/(4! * 12!)

Using this formula, we can calculate the number of ways to select 4 sites out of 16 as 1820 ways.

This means that the store chain has 4845 different ways to select the 4 sites from the 16 available sites assuming each site is equally likely to be chosen.

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Answer:

71

Step-by-step explanation:

The volume of the parallelepiped with adjacent edges PQ, PR, and PS     is V=16  

Let the parallelepiped be PQRS.

The vertices of parallelepiped are P(3, 0, 1), Q(-1, 2, 5), R(5, 1, -1), S(0, 4, 2).

Given three vectors, there is a product, called scalar triple product, that gives (the absolute value of it), the volume of the parallelepiped that has the three vectors as dimensions.

So

PQ=(3+1,0-2,1-5)=(-4,-2,-4)

PR=(-2-1,-1-4,0+1)=(-2,-1,2)

PS=(-2-3,1-6,0-1)=(3,-4,-1)

The scalar triple product is given by the determinant of the matrix (3×3)

that has in the rows the three components of the three vectors:

|-4 -2 -4|

|-2 -1 +2|

|3 -4 -1|

and the determinant is given for example with the Laplace rule choosing the first row:

a(ad-bc)-b(ad-bc)+c(ad-bc)

=4⋅[(−1)(−1)−(2)(−4)]−(−2)[(−2)(−1)−(2)⋅(3)+(−4)[(−2)(−4)−(−1)(3)]

=4(1+8)+2(2−6)−4(8+3)

=36−8−44=−16

So the volume is: V=|−16|=16

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The amount paid for the dress to the nearest dollar is $109

From the question, we are to calculate the amount paid for the dress

From the given information,

Atiku is allowed a discount of 12.5% on a dress that cost $125

First, we will calculate the discount

Discount = 12.5% of $125

Discount = 0.125 × $125

Discount = $15.625

Amount paid = Cost - Discount

Thus,

Amount paid = $125 - $15.625

Amount paid = $109.375

Amount paid ≈ $109

Hence, the amount paid is $109

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An expression, often known as a mathematical expression, is a finite collection of symbols that are well-formed in accordance with context-dependent principles.

Given data :

1 ) 6x - 4y = 2

- 2x + 4y = 18

( 5. 7 )

=

=         6x-4y=2

    {-2x+4y=18(5.7)}

= [ -2{1+2y}{3}+4y=18. 5.7 ]

= [tex]\frac{-2+8y}{3}[/tex] = 102.6

= y = 38.725

= x = [tex]\frac{1+2\cdot \:38.725}{3}[/tex]

x = 26.15

2)  -4x - 12y=-24

    -2x - 4y =-10

         (3,1)

Solve the equation for x

x = 12 − 4y

− 24 − 2x−4y = −31

Solve using substitution

−24 −2 (12−4y) − 4y = −31

Simplify

− 48 + 4y = −31

Move the constant to the right side

4y= −3 1− (−48)

Subtract the terms

4y = 17

​Multiply both sides

4y × [tex]\frac{1}{4}[/tex]  = 17 x [tex]\frac{1}{4}[/tex]

Simplify

4y × [tex]\frac{1}{4}[/tex]  = [tex]\frac{17}{4}[/tex]

Substitute the given value of y into the equation x = 12 − 4y

x = 12 − 4 ×  [tex]\frac{17}{4}[/tex]

Simplify the expression

x=−5

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​

The equation that shows the power of a power property by obtaining the product of the exponents is given as follows:

(y^a)^b = y^(a x b).

Meaning that the lower right option is the correct option.

The power of a power rule is used when a single base is elevated to multiple exponents.

Then the simplified expression is obtained keeping the base, while the exponents are multiplied.

A simple example is given as follows:

(2²)³ = 2^(2 x 3) = 2^6.

Hence the general format of the expression is presented as follows:

(y^a)^b = y^(a x b).

Which gives the correct option in the context of this problem, and the correct option is the bottom right option.

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Angle C is 70°

Angle A is 30°

Side AC is 12 cm.

They tend to satisfice, meaning they settle on a satisfactory solution rather than searching for the optimal solution.

This type of decision making is known as bounded rationality. Bounded rationality acknowledges that people often make decisions based on incomplete and imperfect information but seek the best possible outcome. People use heuristics and mental shortcuts to make decisions and tend to satisfice, which means they settle on a satisfactory solution rather than searching for the optimal solution. This type of decision making is often used when the complexity of a problem is too great to be solved analytically.

Bounded rationality is a type of decision making which acknowledges that people often make decisions based on incomplete and imperfect information, and seek the best possible outcome using heuristics and mental shortcuts. They tend to satisfice, meaning they settle on a satisfactory solution rather than searching for the optimal solution.

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Using factorization, the zeros of the polynomial y = 3p³ - 8p² + 4p are 0, 2/3 and 2.

The values of the independent variable (x) for which the function equals zero are referred to as the zeros of a function, also known as the roots or solutions. They are, in other words, the x-coordinates of the spots where the function's graph crosses the x-axis. You can set a function's value to zero and then work out the value(s) of x that the equation requires in order to identify the zeros of the function.

If the function, for instance, is f(x), then you would set f(x) to 0 and then solve for x:

f(x) = x^2 + 2x - 3 = 0

This can be simplified as

(x-3)(x+1) = 0

Taking the x - values

x - 3 = 3

or

x + 1 = -1

hence;

x^2 + 2x - 3 = -1, 3

Therefore, -1 and 3 are the zeros of the function f(x) = x2 + 2x - 3.

In our given problem;

y = 3p³ - 8p² + 4p

y = p(3p - 2)(p - 2)

Taking the zeros

0 = p(3p - 2)(p - 2)

p = 0

3p - 2 = 0

p = 2 / 3

p - 2 = 0

p = 2

The zeros or roots of the polynomial are (0, 2/3 and 2)

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From the given information, the value of x in the given table is 42.5.

To find the value of x, we can use the formula for the arithmetic mean (average) of a set of numbers:

Arithmetic mean = (sum of all numbers) / (number of numbers)

Given that the average score on the test is 62, we can use this information to find the sum of all the scores.

Given that number of students is 1,2,3 and 4 with scores of 40,55,70 respectively, we can use this information to find the sum of all the scores.

Sum of all scores = (1 * 40) + (2 * 55) + (3 * 70) + (4 * x)

Now we can substitute the given average score and the number of students into the equation and solve for x.

62 = (1 * 40) + (2 * 55) + (3 * 70) + (4 * x) / 10

620 = 40 + 110 + 210 + 4x

4x = 170

x = 42.5

So, the value of x is 42.5

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The complete question is -

ten students wrote a test, and the distribution of scores is shown in the frequency table. if the average (arithmetic mean) score is 62, what is the value of x?

Score - 40, 55, 70, x

Number of students - 1, 2, 3, 4

All the Individuals solutions are solved below:

a) To verify that y = e^m_1x - e^m_2 x/m_1 - m_2 is a solution of the differential equation y" - (m_1 + m_2)y' + m_1 m_2y = 0, we can substitute y into the equation and simplify:

y" = m_1^2e^m_1x - m_2^2e^m_2x

y' = m_1e^m_1x - m_2e^m_2x

so:

y" - (m_1 + m_2)y' + m_1 m_2y = m_1^2e^m_1x - m_2^2e^m_2x - (m_1 + m_2)(m_1e^m_1x - m_2e^m_2x) + m_1 m_2(e^m_1x - e^m_2x/m_1 - m_2) = 0

b) To find the limit of the solution in part (a) as m_1 right arrow m_2, we can use I'Hospital's rule. The limit is:

lim (m_1 -> m_2) e^m_1x - e^m_2 x/m_1 - m_2 = e^m_2x - e^m_2 x/m_2 - m_2 = e^m_2x - e^m_2x - m_2 = -m_2

c) To verify that the limit in part (b) satisfies the differential equation obtained from the equation in part (a) by replacing mi by m_2, we can substitute -m_2 into the equation:

y" - (m_2 + m_2)y' + m_2 m_2y = 0

y" - 2m_2y' + m_2^2y = 0

which is the differential equation of a constant function, and -m_2 is a constant function. Therefore, the limit in part (b) satisfies the differential equation.

It should be noted that the solution y = e^m_1x - e^m_2 x/m_1 - m_2 is a linearly independent solution of the differential equation y" - (m_1 + m_2)y' + m_1 m_2y = 0, and it can be used in combination with the general solution y = c_1e^m_1x + c_2e^m_2x to find the general solution of the differential equation.

Therefore, All the Individuals' solutions are solved.

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The total area of the two non-shaded crescent-shaped regions =25π ^2

The length of hypotenuse = 10

(6^2 + 8^2 = 10^2 )

Therefore, the radius of the large semicircle equals 5.            
area of large semi-circle = 25π

As a result, the total area of the two non-shaded regions is 25π^ 2

A semicircle is formed when a circle is divided in half along its diameter

The circumference of a semicircle is curved, and the diameter is straight.
A semicircle has a right angle of 90.


For example PR is a diameter and (angle PRQ=25.  The size of (angle QPR) is  (angle PQR=90circ) because it is the angle in a semicircle. The sum of  triangle's three angles is 180.    
   
     
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Answer:

Step-by-step explanation:

The probability that Steve chooses two different types of biscuits is 5/11 (or approximately 0.4545).

To calculate this, we need to consider the different combinations of two biscuits that Steve can take from the tin. There are two digestive biscuits, three chocolate biscuits, and seven ginger biscuits, so the total number of possible combinations is 12.

The number of combinations where he chooses two different types of biscuits is 5 (2 digestive and 1 chocolate, 2 digestive and 1 ginger, 1 chocolate and 1 ginger).

Therefore, the probability of choosing two different types of biscuits is 5/12, which is 0.4545.

Answer:

I think it's 3

Step-by-step explanation:

becuse if he has 12 biscuits and u take away 2 which is 10. then its says there are 3 chocolate but it might just be chocolate not a biscuit. then u take away 7 and u get 3.

Answer:

Step-by-step explanation:

21

Answer:

Sam bikes at a faster rate.  He can go 42.6 km in one hour while Alex is only able to go 39.6 km in the same amount of time.

Step-by-step explanation:

Alex's unit rate:

198/5 = 39.6 km per hour

Sam's unit rate:

298/7 = 42.6 km per hour rounded to the nearest tenths'

Answer:

3x + 2

Step-by-step explanation:

this is an algebraic equation.

Answer:

Step-by-step explanation:

3*x+2