suppose that 90% of the patients with a certain disease can be cured with a certain drug. what is the approximate probability that, of 50 such patients, at least 45 can be cured with the drug?

The description of the cosine function is [tex]\mathrm{f(x) = -10 \cos( \frac{2\pi}{3}) x + 10}[/tex].

A cosine function's general form is given by:

[tex]\mathrm{f(x) = A \times cos(Bx + C)) + D}[/tex]

where:

A stand for amplitude, or the ratio of the maximum to the minimum value.

B = 2π / period

C stands for horizontal phase shift.

(Midpoint between the Maximum and Minimum Values) D = Vertical Shift

We can determine the parameters for the specified function given the information given:

Period = 3 (This means B = 2π / 3)

Maximum value = 20

This means the amplitude A is half of this, so A = 20 / 2 = 10

Minimum value = 0

This means the vertical shift D is half of the difference between the maximum and minimum.

So, D = (20 - 0) / 2

= 10

The amplitude is negative because the function is a mirror of its parent function over the x-axis, hence A = -10.

Putting it all together, the function is:

[tex]\mathrm{f(x) = -10 \cos( \frac{2\pi}{3}) x + 10}[/tex]

Hence the final expression after the transformation is [tex]\mathrm{f(x) = -10 \cos( \frac{2\pi}{3}) x + 10}[/tex].

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Answer:

  (c)  (1/14)xy(x² +8y)

Step-by-step explanation:

You want the greatest common factor factored out of the expression 1/14x³y +8/14xy².

The coefficients 1/14 and 8/14 have a common factor of 1/14.

The variable terms x³y and xy² have variables x and y. The exponents of x are 3 and 1, so x¹ = x will be the common factor.

Similarly, the exponents of y are 1 and 2, so y¹ = y will be their common factor.

When we factor out (1/14)(x)(y) from the terms of the given expression, it becomes ...

  1/14xy(x² +y)

False, Stay on SRATC3 but decrease to the point touching LRATC.

What is  LRAC curve ?

The LRAC curve is the curve that a company would follow in order to reduce its cost per unit for each specific long-run quantity of output.

              One particular level of fixed costs is represented by each of the short-run average cost (SRAC) curves that make up the LRAC curve.

Why is Lrac crucial?

Over a variety of outputs, the effect is a decrease in average costs. A company may gain a competitive edge in a market thanks to these lower expenses, which signify an increase in production efficiency.

                        Consumer prices may be reduced as a result, and corporate earnings and dividends may increase.

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If m<10 = m<3, then the lines are parallel by the: alternate exterior angle converse theorem.

The pair of angles known as alternate external angles are those that are generated on the other side of the transversal from the parallel lines' outer side.

According to the opposite of the alternative exterior angle theorem, if two lines are cut by a transversal and their alternate exterior angles are congruent, the lines are parallel.

In the figure angel 10 and 3 are alternate exterior angles

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Answer:

The slope is -9/8.

Step-by-step explanation:

[tex]m = \frac{13 - 4}{2 - 10} = \frac{9}{ - 8} = - \frac{9}{8} [/tex]

The two lines on the system aren't parallel, thus, the system has only one solution.

Here we have the following system of equations:

3x - 10y = -7

-17x - 10y = -16

Now, notice that both equations are linear equations, and the equations are not parallel (the coefficients on the left side are different), which means that the two linear equations will intercept at some point (and at only one point)

That is enough to conclude that the system of equations will have only one solution.

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The total height of Dange after calculation from the given data is 48 inches.

Let x be the Dange's height ,

then,

27.5% of x = 13.2

x = 13.2*100 / 27.5

x = 48 in

Therefore , he is 48 inch tall.

A value or ratio that can be expressed as a simple fraction of 100 is known as a percentage.

To obtain a percentage we just need to divide it by 100 and then multiply the obtained result by 100.

As a result, the proportion refers to a component per 100. Percentage is denoted as a portion of 100 of something.

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Caitlyn would need to know the population size of Montana in order to predict how many babies will be born this year in the state.

In order to predict how many babies will be born this year in Montana, Caitlyn needs to have access to the population size of Montana. The total fertility rate for Montana is 1.73, which is the average number of children a woman can expect to have throughout her lifetime. Knowing the population size of Montana will allow Caitlyn to have a better understanding of how many babies are likely to be born this year, as this number is directly correlated to the total fertility rate. By having access to both the population size and the total fertility rate, Caitlyn will be able to make a more informed prediction about the number of babies that will be born this year in Montana.

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Answer:

x = 18

Step-by-step explanation:

You apply the exponent rules

4x = 3 (x + 6)

Then you solve 4x =3  (x + 6)  

Which gives you 18

Standard error for sample proportion = √{[p₁/p₂(1-p₁/p₂)]/2}

What means standard error?

Standard error is a statistical statement that express the accuracy of an estimation resulting from survey study. It indicates how much a sample means is differ from actual population mean.

How to calculate standard error?

We calculate standard error for the two-survey group by using the following formula.

√[p(1-p)/n]

p is the proportion of freshmen living on campus to the freshmen living off campus

p = p₁/p₂

According to the given question:

p₁ = freshmen living on campus

p₂= freshmen living off campus

n= number of survey group

n=2

hence, standard error =√{[p₁/p₂(1-p₁/p₂)]/2}

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Answer:

8. 1.5

9 (a) $90

   (b) $510

Step-by-step explanation:

8.

[tex]\frac{1}{4} - \frac{2x-7}{8} = \frac {x}{2}[/tex]

Multiply all by 8

[tex]2 - (2x-7) = 4x\\2 - 2x + 7 = 4x\\9 = 4x + 2x\\9 = 6x\\\frac{9}{6} = x\\1.5 = x[/tex]

9. (a)

x = cost of one DVD

Since, a blue-ray disc is equal to 2 DVD minus by 10 dollar, then a blue-ray disc = (2x-$10)

$ 610 = 3x + 2(2x - $10)

$ 610 = 3x + 4x - $ 20

$ 610 + $ 20 = 7x

$ 630 = 7x

Divide both side by 7

x = $ 90

Thus, one DVD cost $ 90.

(b)

Blue-ray disc cost = (2x - $10)

3 Blue-ray disc cost = 3(2x - $10)

= 6x - $30

Replace x with $90, since x = $90

= 6 ($90) - $30

= $ 540 - $30

= $510

Total bill that should be paid by Olive is $46.61. Olive's calculation is incorrect because she is applying the discount and tax to the original price of the clothes rather than to the discounted price.

A total bill is the final amount of money that is due for payment, usually for goods or services that have been provided. It is the sum of all charges, fees, taxes, and other expenses that have been incurred. The total bill may be presented as a single amount or as a breakdown of the various charges that make up the total.

The correct expression to calculate the total cost of the clothes would be:

Total cost = (Original price * (1 - Discount rate)) * (1 + Tax rate)

In this case, the original price is $54.50, the discount rate is 20%, and the tax rate is 7.5%. Plugging these values into the above expression gives us:

Total cost = (54.50 * (1 - 0.20)) * (1 + 0.075)

Total cost = (54.50 * 0.80) * 1.075

Total cost = $43.60 * 1.075

Total cost = $46.61

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Step-by-step explanation:

Incomplete problem...

Answer:

A) F(x) = 1/(x-2)(x-2)

Step-by-step explanation:

Below in the picture of how the graph will look like:-

I hope my answer helps you.

Answer:

The difference is 60.

Step-by-step explanation:

Since no more than 5 people can stay in each of the 15 rooms, we can multiply these numbers to get the largest amount of guests.

5 x 15 = 75

We assume the smallest amount can be 1 person in each of the 15 rooms.

1 x 15 = 15

We then subtract the smallest from the largest to find the difference.

75 - 15 = 60

Option- D is correct that is the probability that at most 27 heads occur is 0.99999994.

Given that,

A fair coin is tossed 29 times.

We have to find what is the probability that at most 27 heads occur.

We know that,

A fair coin is tossed 29 times.

n=29

Probability of heads p=1/2

q= 1-p

q=1-1/2=1/2

We get

P (X=x) = ⁿCₓ qⁿ⁻ˣ pˣ

Now, the probability that at most 27 heads occurs is

P(X<27)

=1-[P(X=28)+ P(X=29)]

=1-[²⁹C₂₈(1/2)²⁹⁻²⁸(1/2)²⁸- ²⁹C₂₉(1/2)²⁹⁻²⁹(1/2)²⁹]

=1-[²⁹C₂₈(1/2)²⁹- ²⁹C₂₉(1/2)²⁹]

=1-[28+1](1/2)²⁹

=1-29×0.00000000186

=0.999999945

Therefore, Option- D is correct that is the probability that at most 27 heads occur is 0.99999994.

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Answer:

£2.94

Step-by-step explanation:

You need two 750g boxes to get 1500g of cornflakes.

Buy one and get 2nd at half price:

1.96 + 1.96/2 = £2.94

Answer: 9%

Step-by-step explanation:

First, take 94.83 divided by 87, then times 100% = 109%

Then take 109 -100 = 9%

So the sales tas percentage is 9%

Answer:

To test the hypothesis that most students in Year 9 sleep at least 10 hours on a school night, a questionnaire could be designed with the following questions:

1) How many hours of sleep do you typically get on a school night?

2) On a scale of 1 to 10, with 1 being "not at all" and 10 being "extremely", how well-rested do you feel when you wake up in the morning?

3) Do you have any difficulties falling asleep at night?

4) Do you have any daytime sleepiness or fatigue?

5) Do you regularly engage in activities that interfere with your sleep, such as using electronic devices before bed or consuming caffeine late in the day?

The questionnaire should also include space for respondents to provide their age and grade level, as well as any additional comments or observations they may have about their sleep habits. By collecting and analyzing this data, it should be possible to determine whether the hypothesis is supported or not.

Answer:

u=14, v=2

Step-by-step explanation:

Here's my attempt:

Proving triangle congruency:

We need to prove that the two triangles are congruent.

First, we need to see which sides/angles correspond (basically how the two triangles overlap each other).

Well, we can see that m∠F = 90° and that m∠D = 90°, so we know that ∠F and ∠D are congruent, and so they correspond.

So, if you drag ΔHFG over to ΔCDE, then sides DC and FH would be right on top of each other. (try drawing this to make it clearer)

Solving for v:

So if sides DC and FH are congruent, then their values are also equal.

DC = 17v and FH = v+32

So if DC=FH, then 17v=v+32

Then, we simplify this:

17v=v+32     [original equation]

16v=32     [subtract v from both sides]

v=2     [divide both sides by 16 to isolate v]

So, we have our value for v: v=2

Solving for u:

Now, it's time to find u:  (also, it doesn't matter if you found v first or u first in this problem)

When we overlapped ΔHFG and ΔCDE, we saw that EC = GH

So, using the same method as we used to find v, we can say that

EC=7u and GH = 10u-42

If EC=GH, then 7u=10u-42

Then, we simplify:

7u=10u-42     [original equation]
-3u=-42     [subtract 10u from both sides to get u on just one side]
u=14     [subtract both sides by -3 to isolate u]

Finally, we have our value for u: u=14

But we're not done yet: let's check our work:

Firstly, let's plug our answer for v into our equation for v:

17v=v+32
17(2)=(2)+32
34=34     It works!

Next, we'll plug in our answer for u into our equation for u:

7u=10u-42

7(14)=10(14)-42

98=140-42

98=98     It works!

I hope you read through my explanation and that it helped! :D

The expression for the sum is 2n + 1 and the sum must be an odd number because it will leave 1 as remainder when divided by 2.

The Euclid division lemma states that when two positive integers a and b are divided then their are other two integers q and r that represent quotient and remainder. The equation for the lemma can be written as a = bq + r where r < b.

(a) The given consecutive integers are n and n + 1 respectively.

The expression for their sum can be written as,

n + n + 1

⇒ 2n + 1

(b) The general expression for the sum is 2n + 1.

Now, as per the Euclid's division lemma, the number when divide by 2 will leave remainder as 1.

Which implies the number will be an odd number.

Hence, the expression for the sum is 2n + 1 and it will be an odd number.

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Answer:

The possible pairs of numbers that satisfy the given conditions are (x, y) = (4, 2) and (x, y) = (8, -2).

Step-by-step explanation:

To solve this problem, we can use algebra. Let's call the two numbers x and y. We are given that x + y = 6 and x^2 + y^2 = 28. We can square the equation x + y = 6 to get x^2 + 2xy + y^2 = 36. We can then subtract the equation x^2 + y^2 = 28 from the equation x^2 + 2xy + y^2 = 36 to get 2xy = 8. We can then divide both sides by 2 to get xy = 4.

We can then use the equation x + y = 6 to write x = 6 - y, which we can substitute into the equation xy =  to get (6 - y)y = 4. Solving this equation for y yields y = 2 or y = -2.

If y = 2, then x = 6 - y = 6 - 2 = 4, so the two numbers are x = 4 and y = 2. If y = -2, then x = 6 - y = 6 + 2 = 8, so the two numbers are x = 8 and y = -2. Therefore, the possible pairs of numbers that satisfy the given conditions are (x, y) = (4, 2) and (x, y) = (8, -2).

The value for x is 25.5 units.

What are the Basic Trigonometry Formulas?

Basic trigonometry formulas are used to find the relationship of trig ratios and the ratio of the corresponding sides of a right-angled triangle. There are basic 6 trigonometric ratios used in trigonometry, also called trigonometric functions- sine, cosine, secant, co-secant, tangent, and co-tangent, written as sin, cos, sec, csc, tan, cot in short.

We have,

Perpendicular side = 18

Hypotenuse side = x

θ = 90/2 = 45°

sinθ = Perpendicular side/Hypotenuse side

sinθ = 18 / x

sin(45°) = 18 / x

1/√2 = 18 / x

x = 18 *√2

x = 25.4558

x = 25.5

Hence, the value for x is 25.5 units.

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A Discrete random variable has either a finite or a countable number of values.

A discrete random variable is a random variable that is capable of taking on only a finite or countable number of distinct values. This means that the possible values of the random variable can be listed out, such as 1, 2, 3, 4, and so on.

Discrete random variables are commonly used in statistics to describe situations where the possible outcomes can be counted, such as the number of heads in a series of coin flips, or the number of students in a class.

Discrete random variables can take on either discrete values (such as integers) or continuous values (such as real numbers). They are often used to model a process that is composed of a finite number of distinct steps, such as a multiple choice test with a fixed set of questions and answers.

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The circumference of a circle is 32π feet, which is the correct answer would be option (B).

The Circumference of a circle is defined as the product of the diameter of the circle and pi.

C = πd

where 'd' is the diameter of the circle

We have to determine the circumference of a circle whose radius is 16 feet

As per the question, we have

The radius of the circle r = 16 feet

Circumference of a circle = 2πr

Substitute the value of r in the above formula, and we get

Circumference of a circle = 2π(16)

Circumference of a circle = 32π

Hence, the correct answer would be an option (B).

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Answer:

It's 111 degrees

Step-by-step explanation:

The unknown angle is alternating with the 111 degrees angle

The diameter of the spherical tank that holds 9000ft³ of water is 25.81 ft.

A diameter is a line that divides a circle into two equal parts.

To calculate the diameter of the tank, we use the formula below.

Formula:

Making d the subject of the equation,

Where:

From the question,

Given:

Substitute these values into equation 2

Hence, the diameter of the tank is 25.81 ft.

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