A student takes a true-false test that has 12 questions and guesses randomly at each answer. let x be the number of questions answered correctly. find p(x=5)
a. 0.1934
b. 0.2256
c. 0.1208
d. 0.0002

Answers

Answer 1
The correct answer is a) 0.1934.

The binomial distribution is
[tex](_k^n)p^k(1-p)^{n-k}[/tex], where n is the number of trials (questions), k is the number of successes (correct answers), and p is the probability of a success (0.5 on true-false questions).  Using our information we have:

[tex](_5^{12})(0.5)^5(1-0.5)^{12-5} \\ \\=(_5^{12})(0.5)^5(0.5)^7 \\ \\=\frac{12!}{5!7!}(0.5)^5(0.5)^7 \\ \\=792(0.5)^5(0.5)^7 \\=0.1934[/tex]

Related Questions

The graph is supposed to show f(x)=3sin(x/4+1)-1/2. Which of the following are correctly represented in the graph? Select all that apply. (2 answers)
a. the amplitude
b. the vertical shift
c. the horizontal shift
d. the period
e. the horizontal expansion or compression

Answers

amplitude is correct
The vertical shift is correct
and the horizontal shift is correct

Answer:

a , b, c are only applicable in graph.

Step-by-step explanation:

Given : The function  [tex]f(x)=3sin(\frac{x}{4}+1)-\frac{1}{2}[/tex]

To find : Which of the following are correctly represented in the graph?

Solution :

General form of sin function is [tex]y=A sin(B(x-C)+D[/tex]

Where A is the amplitude

[tex]B=\frac{2\pi}{\text{Period}}[/tex]

D is the vertical shift.    

C is the horizontal shift or phase shift.

Comparing with the general form:      

[tex]f(x)=3sin(\frac{x}{4}+1)-\frac{1}{2}[/tex]

Transform little bit we get,

[tex]f(x)=3sin(\frac{1}{4}(x-(-4)))-\frac{1}{2}[/tex]

a. Amplitude is [tex]A=3[/tex]

It is correct.

b. Vertical shift is [tex]D= -\frac{1}{2}[/tex]

it is correct.

c. Horizontal shift [tex]C=-4[/tex]

It is correct.

d. Period is [tex]P=\frac{2\pi}{B}[/tex]

[tex]P=\frac{2\pi}{\frac{1}{4}}[/tex]    

[tex]P=8\pi[/tex]    

It is not correct .

Actual period in graph is [tex]2\pi[/tex]

e. The horizontal expansion or compression

It also not correct because period is not correct.

The expansion and compression depends on the period.

Therefore, a , b, c are only applicable in the graph.

The masses of four planets in a solar system outside the Milky Way are given below.

Mass of Planet A: 5.97 × 10^24 kg
Mass of Planet B: 3.30 × 10^23 kg
Mass of Planet C: 1.89 × 10^27 kg
Mass of Planet D: 4.87 × 10^24 kg

What is the order of these planets from least to greatest mass?
-Planet C, Planet B, Planet D, Planet A
-Planet C, Planet A, Planet D, Planet B
-Planet B, Planet D, Planet A, Planet C
-Planet A, Planet D, Planet B, Planet C

Answers

Your answer is Planet B, Planet D, Planet A, Planet C. 
Look at the exponents.
23 comes before 24 and 27. So 3.30 x 10 ^ 23 comes first. Next, 24, and there are 2, so  go by the decimals, 4.87 comes before 5.97. So 4.87 x 10^24 comes before 5.97 x 10^24. Then, that leaves 1.89 x 10^27.

if (1+sina)(1+sinb)(1+sinc)=(1-sina)(1-sinb)(1-sinc)=k then value of k=?
a. (cosacosbcosc)
b.(sinasinbsinc)
c. (3sinasinbsinc),

Answers

k = (1+sina)(1+sinb)(1+sinc) = (1-sina)(1-sinb)(1-sinc) Multiply both entities, k x k = (1+sina)(1+sinb)(1+sinc) x (1-sina)(1-sinb)(1-sinc) That gives k^2 = (1 - sin^2a)(1 - sin^2b)(1 - sin^2c) k^2 = (cos^2a) x (cos^2b) x (cos^2c) k = sqrt ((cos^2a) x (cos^2b) x (cos^2c)) k = cosacosbcosc option a is correct.

If AB=6and AC=8, which statement will justify similarity by SAS?

Answers

1). is the correct answer.
the answer to this problem is choice 4 because
[tex]ab = 6 \: \: and \: \: ac = 8[/tex]
so we need to find the answer choice such that we can set up a proportion of sides that are equal
[tex] \frac{ab}{de} = \frac{ac}{df} [/tex]
plugging in choice we find choice 4 is correct because
[tex] \frac{15}{6} = \frac{20}{8} [/tex]
simplify and get
[tex]2.5 = 2.5[/tex]
this would mean the sides are similar of both triangles. now we can consider the angle were given and justify that both triangles are similar under choice 4




Triangle ABC is undergoing a series of transformations. Which of the following transformations will NOT cause the resulting triangle A'B'C' to maintain congruence with triangle ABC? A. reflection over the x-axis B. translation 6 units to the right C. dilation with a scale factor of 3 D. rotation of 180 degrees clockwise

Answers

C is the correct answer
dilation will change the shape and it will not be congruent

Answer:

The image triangle compare to the pre-image triangle will be similar due to dilation.

Step-by-step explanation:

A company is considering adding a new ingredient to its bread recipe to increase the freshness of the bread. To study the impact of adding ingredient P, Q, R, S, or T to the recipe, they baked 270 loaves of bread. Some of the loaves contained no extra ingredients, while each of the rest contained one of the five new ingredients. The freshness of the bread was checked one week later, and the results were used to create the two-way tables below.

Which tables suggest an association between adding an extra ingredient and the freshness of the bread? Check all that apply.

(Tables Below)

Answers

Answer:

Effect of ingrediant R on freshness

Effect of Ingredient S on freshness

Effect of ingrediant T on freshness

Step-by-step explanation:

X Effect of ingrediant P on freshness

X Effect of ingrediant Q on freshness

* Effect of ingrediant R on freshness

* Effect of Ingredient S on freshness

* Effect of ingrediant T on freshness

Answer on edge

f is between e and g, EF=7 and FG=6. find EG

Answers

------- (EF)
------   (FG)
------ + ------- =
6 + 7 =
13

The measure of line segment EG is 13 cm.

Given that, F is between E and G, EF=7 and FG=6.

We need to find the measure of EG.

What is a line segment?

A line segment is a part of a line that has two endpoints and a fixed length. It is different from a line that does not have a beginning or an end and which can be extended in both directions. In this lesson, we will learn more about a line segment, its symbol, and the way to measure a line segment.

Now, EG=EF+FG

⇒EG=7+6=13 cm

Therefore, the measure of line segment EG is 13 cm.

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What do you ask about if you want to know the price of an item?
A. el dependiente
B. el vestido
C. el precio
D. la tienda
Please help thank you

Answers

Answer:

1. C el precio

2. C mil

3. C El abrigo y las botas cuestan doscientos dolares

4. A maya

5. C blouse


Step-by-step explanation:


Find the value of 'm' if (-m,2) is a solution of equation 4x+9y-6=0

Answers

-4m +18-6=0
-4m+12=0
-4m=-12
m=3

HEY PEOPLE NEED HELP WITH 2 QUESTION PLZ ANSWER

Answers

So for the first problem it would be the first solution you see there, and for the second problem it would be the last answer.

My advice would to use this site that I found called math papa, it helps a lot in algebra. :)

This figure shows circle C with diameter LM and inscribed ∠LMN .

m∠LMN=32°



What is the measure of arc LMN?

Enter your answer in the box.

Answers

the answer is 296 degress

Answer:

[tex]296^{\circ}[/tex]

Step-by-step explanation:

It is given that figure shows circle C with diameter LM and inscribed ∠LMN and    m∠LMN=32° .

We know that the angle formed at the center is double the angle formed on the vertex that is an inscribed angle, thus on joining NC, we have

[tex]{\angle}NCL=2({\angle}LMN)[/tex]

Substituting the given values, we have

[tex]{\angle}NCL=2(32^{\circ})[/tex]

[tex]{\angle}NCL=64^{\circ}[/tex]

Now, [tex]minor{\angle}LCN+major{\angle}LCN=360^{\circ}[/tex] (complete angle)

[tex]major{\angle}LCN=296^{\circ}[/tex]

Therefore, the measure of the arc LMN is [tex]296^{\circ}[/tex].

Find the least common multiple of x² + x – 12 and x² + 2x – 15.

A) (x + 4)(x - 3)(x + 5)
B) (x – 3)(x + 5)(x – 4)
C) (x – 4)(x – 3)(x – 5)
D) (x + 4)(x – 5)(x – 3),

Answers

1.(x+4)(x-3)(x+5) 
2. w+4/w-5
3.b-10/b-1

The least common multiple of x² + x – 12 and x² + 2x – 15 is (x + 4)(x – 3)(x + 5), Option A is correct.

What is quadratic equation?

A quadratic equation is a second-order polynomial equation in a single variable x , ax2+bx+c=0. with a ≠ 0 .

We need to find the least common multiple of x² + x – 12 and x² + 2x – 15.

Let us find the factor of x² + x – 12

x² + 4x -3x – 12

x(x+4)+3(x+4)

(x + 4)(x – 3)

Now let us factorize x² + 2x – 15.

x² + 5x-3x – 15.

x(x+5)-3(x+5)

(x-3)(x+5)

So, the least common multiple of x² + x – 12 and x² + 2x – 15 is (x + 4)(x – 3)(x + 5).

Hence, the least common multiple of x² + x – 12 and x² + 2x – 15 is (x + 4)(x – 3)(x + 5), Option A is correct.

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Is the product of 2/5 and 5 greater or less than 2/5? Is it greater or less than 5? explain your reasoning.

Answers

Hello!

5 = 5/1 as a fraction

2/5 × 5/1 = 2

ANSWER:

The product of 2/5 and 5 is greater than 2/5, and less than 5.

Another way you could find out if it's greater or less is by converting the fraction to a decimal and then multiplying it.
You must divide the numerator by the denominator to convert a fraction to a decimal.

2 ÷ 5 = 0.4

0.4 × 5 = 2

The sum of 3 consecutive even numbers of 78

Answers

26, 24, 28 could be the answer
x+x+2+x+4=78
3x+6=72
3x=72
x=72/3
x=24

HELPP needed due today !!

Answers

1. Negative linear association

In P.E class, Janie ran 5 kilometers in 19 minutes 15 seconds. Based on this information, what was the constant of proportionality?

Answers

The constant of proportionality is: 3.85, because 19.25/5= 3.85. Hope this helps! :) 

How do you get 90 dollars per 5 hours to 180 dollars to BLANK amount of hours with the numbers of 10,15,45,216,360 to choose from?????

Answers

90/5  = 180 / x

90x = 5 * 180 = 900

x = 10 Answer

Which set of side lengths can form a triangle?
a. 6cm, 8cm, and 16cmB. 6cm, 8cm, and 10cmC. 6cm, 7cm, and 14cmD. 6cm, 7cm, and 20cm

Answers

the only one would be B because the rest don't follow the rules to create a triangle

Find the percent of discount. Round to nearest tenth.
Original price $24,365; selling price $16,820

Answers

Your answer is 31% I believe. 

25 POINTS PLEASE HELPIf the fifth term of an arithmetic sequence is 11 and the common difference is​ 4, then the sixth term of the sequence is.

Answers

Final answer:

The sixth term of an arithmetic sequence, with a fifth term of 11 and a common difference of 4, is calculated to be 15.

Explanation:

The student's question is about determining the sixth term of an arithmetic sequence when the fifth term and the common difference are given. The fifth term is 11, and the common difference is 4. To find the sixth term, we follow the definition of an arithmetic sequence where each term is equal to the previous term plus the common difference.

Arithmetic sequence formula

:

Tn = T(n-1) + d

Where:

Tn is the nth termT(n-1) is the previous termd is the common difference

Applying this formula to find the sixth term:

Sixth term = Fifth term + Common difference

= 11 + 4

= 15

Therefore, the sixth term of the sequence is 15.

Preform the indicated operation. Then choose the best answer. 27.7 x 1.9

Answers

Your answer would be 526.3

How can you minimize the risk from your investments?

A.) By investing in a stock with the highest volatility.
B.) By investing in a stock with maximum returns.
C.) By investing in a variety of investment options.
Will fan and medal,

Answers

You can minimize the risk from your investments by investing in a variety of investment options. The variety of your investments will reduce the overall risk from your investments by purchasing variety of investments in different sectors of the economy. Your investment portfolio should contain different types of investments so that the risk would be spread to these investments.

By investing in a variety of investment options will minimize the risk from your investments.

What is Investment?

Investment is the dedication of money to purchase of an asset to attain an increase in value over a period of time

We need to find in which way we can  minimize the risk from your investments.

Before you begin to invest, think about what returns you’re realistically expecting and be clear on what your investment goals are.

The greater the potential returns, the higher the level of risk.  

The variety of your investments will reduce the overall risk from your investments by purchasing variety of investments in different sectors of the economy.

So one can minimize the risk from your investments by investing in a variety of investment options. Your investment should contain different types of investments so that the risk would be spread to these investments.

Hence, By investing in a variety of investment options will minimize the risk from your investments.

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USING 56 POINTS PLEASE HELP! A square ceiling has a diagonal of 24 ft. Shelton wants to put molding around the perimeter of the ceiling.

How many feet of molding will he need? Round to the nearest foot.

(Thank you!!) PLEASE ROUND THE NUMBER TO THE NEAREST FOOT.

Answers

HE WILL NEED 12 FEET WICH ROUNDED TO THE NEAREST FOOT IS 10 

Answer:

If this is right then yw :)

Step-by-step explanation:

A conservation determines that a particular beach is eroding at a rate of 1.1% each year. When writing an explicit formula to represent the amount of beach remaining each year, which value should she use as the common ratio?

Answers

Answer:

0.989

Step-by-step explanation:

A conservationist determines that a particular beach is eroding at a rate of 1.1% each year. When writing an explicit formula to represent the amount of beach remaining each year, the common ratio is 0.989

The required explicit formula to represent the amount of beach remaining each year will be y = a(0.011)^x

Exponential functions

Exponential functions are inverse of trigonometry functions. The standard form of exponential function is expressed as:

y = ab^x

b is the rate

Given;

Rate = 1.1% = 0.011

The required explicit formula to represent the amount of beach remaining each year will be y = a(0.011)^x

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Answer each question (5 points each). the sample space of a probability experiment is ???? = {????, ????, ????,????, ????, ????, ????, ????} and three events are ???? = {????, ????, ????,????} ???? = {????,????, ????, ????} ???? = {????, ????, ????, ????} (a) what are the outcomes in the event ???? ???????? ????? (b) what are the outcomes in the event ???? ???????? ???? ???????? ????? (c) what are the outcomes in the event ???? ???????????? ????? (d) what are the outcomes in the event ???? ???????????? ?????

Answers

D.

Hope this helps!!!!


:) :) :)

Riya is applying to her garden.She applies it at a rate of 25 ,000 cm^3 of mulch for every m^2 of garden space. At what rate is ray applying mulch in m^3/m^2

Answers

Final answer:

Riya is applying mulch at a rate of 0.025 m^3/m^2 after converting the original rate of 25,000 cm^3/m^2 to cubic meters per square meters.

Explanation:

To find out the rate at which Riya is applying mulch in m^3/m^2, you first need to convert the given value from cubic centimeters (cm^3) to cubic meters (m^3). We know that 1 m = 100 cm, so 1 m^3 = 100 cm * 100 cm * 100 cm = 1,000,000 cm^3. Therefore, we need to divide the given value by 1,000,000 to convert it from cm^3 to m^3. So, if Riya applies 25,000 cm^3 of mulch for every m^2 of garden space, this is equivalent to 25,000/1,000,000 = 0.025 m^3/m^2.

In conclusion, Riya is applying mulch at a rate of 0.025 m^3/m^2.

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How to find the measure of an interior angle of an irregular polygon?

Answers




Exterior Angles of a Polygon Definition: the angle formed by any side of a polygon and the extension of its adjacent side Try this Adjust the polygon below by dragging any orange dot. Click on "make regular" and repeat. Note the behavior of the exterior angles and their sum. Regular polygons In the figure above check "regular". As you can see, for regular polygons all the exterior angles are the same, and like all polygons they add to 360° (see note below). So each exterior angle is 360 divided by the n, the number of sides. As a demonstration of this, drag any vertex towards the center of the polygon. You will see that the angles combine to a full 360° circle. Convex case In the case of convex polygons, where all the vertices point "outwards" away form the interior, the exterior angles are always on the outside of the polygon. In the figure above, check "regular" and notice that this is the case. Although there are two possible exterior angles at each vertex (see note below) we usually only consider one per vertex, selecting the ones that all go around in the same direction, clockwise in the figure above. Taken one per vertex in this manner, the exterior angles always add to 360° This is true no matter how many sides the polygon has, and regardless of whether it is regular or irregular, convex or concave. In the figure above, adjust the number of sides, switch to irregular and drag a vertex to see that this is true. In the figure above click on 'reset' and check "both". You will see that both angles at each vertex are always congruent (same measure). This is because they form a pair of vertical angles, which are always congruent. Drag the vertices around and convince yourself this is true. Concave case If the polygon is concave, things are a little trickier. A concave polygon has one or more vertices "pushed in" so they point towards the interior. In the figure above, uncheck "regular" and drag a vertex in towards the interior of the polygon. Notice that the exterior angle flips over into the inside of the polygon and becomes negative. If you add the exterior angles like before, they still add to 360°, you just have to remember to add the negative angles correctly. Exterior and Interior angles are supplementary At any given vertex, the interior angle is supplementary to an exterior angle. See Interior/Exterior angle relationship in a polygon. Walking the polygon In the figure above, imagine the polygon drawn on the ground. Stand on one of the sides and face along the line. Now if you walk around the polygon along each line in turn, you will eventually wind up back where you started, facing the same way. So you must have turned through a total of 360°, a full circle. This confirms that the exterior angles, taken one per vertex, add to 360° The sum of exterior angles - watch out! In most geometry textbooks they say flatly that the exterior angles of a polygon add to 360° This is only true if: You take only one per vertex, and Take all the angles that point in the same direction around the polygon. But in many cases they fail to state these conditions. In the figure at the top of the page, check the "Both" checkbox. You will see there are two per vertex and they actually add to 720° (360 times 2) So if you are asked "What is the sum of the exterior angles of a polygon?" without any conditions, you will have to guess which one they mean. Usually they mean taking one per vertex, and the answer is 360°, although strictly speaking this is wrong.

50 POINTS!!!!!!! Soybean meal is 16% protein; cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320-lb mixture that is 14% protein?

How many pounds of cornmeal should be in the mixture?

How many pounds of soybean meal should be in the mixture?

Answers

S + C = 320 --> C = 320 -S 0.16S + 0.08C = 0.13*320 = 41.6 16S + 8C = 4160 16S + 8(320 - S) = 4160 16S + 2560 - 8S = 4160 8S + 2560 = 4160 8S = 4160 -2560 8S = 1600 S = 1600/8 = 200 200 pounds of Soybean and 120 pounds of cornmeal

What is the angle for a and b

Answers

angle A and B would be identical

a triangle is 180 degrees

180 - 40 = 140

140 /2 = 70

angle a and b are 70 degrees
It is an isosceles triangle, so
∠a = ∠b

180 - 40 = 140
140 ÷ 2 = 70° 

∠a = 70°
∠b = 70°

------------------------------------------------------------------
Answer: ∠A = 70° , ∠B = 70°
------------------------------------------------------------------

If y represents total earnings in dollars and x represents hours worked, then which equation models the wages of someone who makes $9.50 an hour?

A. x = 950x
B. y = 950x
C. x = 9.50x
D. y = 9.50x

Answers

The correct answer is D. y = 9.50x.

Answer:

Option D is correct

[tex]y = 9.50x[/tex]

Step-by-step explanation:

Here, y represents total earnings in dollars and  x represents hours worked.

As per the statement:

To find which equation models the wages of someone who makes $9.50 an hour.

[tex]\text{"\$9.50 an hour"}[/tex] translated to 9.50x

then;

the total earning in dollars we get;

[tex]y = 9.50x[/tex]

Therefore, an equation [tex]y = 9.50x[/tex] models the wages of someone who makes $9.50 an hour

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HAMLET'S DULL REVENGE by: Ren Girard 1. identify the claim and the central idea in lines 1-24. 2. what central idea is the author supporting in lines 25-44. 3. what is the reason that neither shakespeare nor hamlet can give up revenge? what evidence does the author present in lines 51-70? 4. what is the value in quoting directly from the play (lines 86-104) instead of merely summarizing the dialogue? why does the author present these examples in this order? 5. read lines 98-122. why is fortinbras' army a "catchy example for hamlet"? what central idea can be inferred from this example? 6. read lines 134-136. how is laertes like the actor that played hecuba? what does this similarity suggest? 7. how does the section from lines 137-148 relate to the authors argument? 8. read lines 166-180. gertrude refers to hamlets outburst as both "madness" and "towering passion". what central idea does Girard infer from these differe What was the effect of the montgomery bus boycott open study? The model shows global air circulation. Identify the wind directions that are correct. More than one answer!A) 1B) 2C) 3D) 4E) 5F) 6 Why were the reaper and the steel plow important for nineteenth-centuary agriculture?A. Reduced yields but cut labor costsB. Made farming of new crops in the east possible.C. Allowed Midwestern families to raise and maintain productionD. They made harvests slower but less expensive what should you do first to simplify the expression (43 + 9) 76 + 5 Rewrite the following equation in slope-intercept form. 5x 14y = 16 Write your answer using integers, proper fractions, and improper fractions in simplest form. Match the nation in column 1 to its description in column 2.A.) AustraliaB.) The Philippines 'C.) Indonesia D.) Malaysia1. Partially a peninsula2. Mostly catholic population3. Only continent sized nation4. Largest Muslim population in the world, which sentence most clearly uses imagery A. "watch out!" Jaime said . "are you crazy?"B.Lend Lester less lost Lesley lose!C. The gunmetal clouds crept over the land .D.royals only associate with other royals, Is 11p-7q polynomial 1.In pea plants, purple flower color is dominant to white flower color. If a homozygous dominant flower mates with a white flower, what is the chance of having white flowered offspring? World war i brought increased immigration to the united states from which country? italy france mexico germany Which three elements are essential for growing crops?environmental hazards, moisture retention, refinementgasoline additives, coal-burning plants, seed corngrain elevators, soil stability, carbon dioxidesunlight, water, soil The idea that psychology is empirical suggests that Select the answer that best completes this sentence: El Arroz Congr es un plato tpico de __________. (5 points) 1.Argentina 2.Colombia 3.Espaa 4.Cuba Simplify fraction 26/39 Read this excerpt. I must close now. But before closing I am impelled to mention one other point in your statement that troubled me profoundly. You warmly commended the Birmingham police force for keeping order and preventing violence. I dont believe you would have so warmly commended the police force if you had seen its angry violent dogs literally biting six unarmed, nonviolent Negroes. I dont believe you would so quickly commend the policemen if you would observe their ugly and inhuman treatment of Negroes here in the city jail; if you would watch them push and curse old Negro women and young Negro girls; if you would see them slap and kick old Negro men and young Negro boys; if you will observe them, as they did on two occasions, refuse to give us food because we wanted to sing our grace together. Im sorry that I cant join you in your praise for the police department. In his Letter from Birmingham City Jail, how does Martin Luther King, Jr. connect the public and private actions of the police? They are both meant to preserve segregation. They are both meant to avoid punishment. They are both meant to earn commendation. They are both meant to show nonviolence. Jennifer recorded the temperature of water samples and the time it took 50g of salt to dissolve in the samples. Jennifer's data models a direct variation. Which table contains Jennifer's data? hat does this suggest? What does this suggest? The presence or absence of four limbs is not a useful character for studying evolutionary relationships among vertebrates. Of the species in the table, rattlesnakes are most closely related to lampreys. Rattlesnakes are more closely related to bass than they are to frogs, turtles, and leopards. The presence or absence of four limbs, on its own, could be misleading when considering the evolutionary relationships of rattlesnakes. The faster the clock speed, the more of these the processor can execute per second. what are they? helpppppppppppppppppppppppppp