Friday

November 21, 2014

November 21, 2014

Total # Posts: 74,437

**Pre-Calc/Trig**

I appreciate your help. Thank you.
*November 11, 2014*

**Pre-Calc/Trig**

Describe the end behavior for function by writing a limit expression. f(x)=2x^5-x+7
*November 11, 2014*

**math**

$28.8
*November 11, 2014*

**Physical Science**

The sun's energy melts part of a glacier of ice at 0 degrees Celsius. The sun supplies 880 kilocalories to a big glacier of ice at 0 degrees Celsius. How many kilograms of ice will melt into liquid water at 0 degrees Celsius?
*November 11, 2014*

**Physics**

500/9.81 50.968(5.0)(10) 250N
*November 11, 2014*

**Physics**

Matthew is spelunking when he loses his rope. John lowers a rope down to him, a distance of 40m. If Matthew has a mass of 50kg, and the rope can withstand a maximum force of 547N without breaking, what is the minimum amount of time it will take to pull Matthew out of the cave??
*November 11, 2014*

**physics**

Mia is on a planet where g=10 m/s^2. she is standing on a bathroom scale in an elevator. the scale reads 500N. the elevator accelerates upward with an acceleration of 5.0m/s^2 what would the scale read now
*November 11, 2014*

**French**

Is this a right way to say, "I'm in ninth grade"? Je suis en neuvième année.
*November 10, 2014*

**algebra**

f(x)=4.75x, gives its domain and range
*November 10, 2014*

**French**

Please check this sentence. Elle adore voyager en avion.
*November 10, 2014*

**French**

Could you please check this sentence? J'habite à Paris avec ma grand-mère, mère et mon grand-père.
*November 10, 2014*

**world problem**

2/3
*November 10, 2014*

**History**

The Universal Declaration of Human Rights uses much more ambiguous but universally acceptable terminology, because it is speaking for the rights of millions of people worldwide of many races and ethnic and religious backgrounds. This cannot be attained without using words and ...
*November 10, 2014*

**science**

the two liters. becuase theres more energy to be absorbed.
*November 10, 2014*

**Calculus**

The chain rule is a rule for differentiating compositions of functions.Use the Chain Rule to differentiate
*November 10, 2014*

**trig**

Find all angles è between 0° and 180° satisfying the given equation. cos è = 1/9
*November 10, 2014*

**science**

An apple falls from a tree and hits the ground 10.4 m below. With what speed will it hit the ground? The acceleration of gravity is 9.8 m/s2
*November 10, 2014*

**Math**

how much space do sleeping quarters take if the sleeping quarters are for 100 guests and average density of the sleeping quarters are 15kg/m2
*November 10, 2014*

**Algebra 2**

Thank you so much DonHo!
*November 10, 2014*

**Algebra 2**

Solve 5x^2 − 34x = 0 by factoring. What is the smaller answer?
*November 10, 2014*

**writing**

a) fifty-fifty b) tom-tom
*November 10, 2014*

**writing**

Murmur is an interesting word because both syllables are spelled the same : mur-mur. While this is an unusual, there are other words with this pattern. See how many of the words below you can guess. a) to split evenly b) a drum you beat with your hands
*November 10, 2014*

**Math Pre Calc Help**

(cos^4x -sin ^4 x)/(sin^2x)=cot^2x -1 How to prove true?
*November 10, 2014*

**Pre calc**

(cos^4x -sin ^4 x)/(sin^2x)=cot^2x -1 Prove true
*November 10, 2014*

**physics**

A hungry bear weighing 720 N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam (see the figure below). The beam is uniform, weighs 200 N, and is 7.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The ...
*November 10, 2014*

**Math**

(cos^4x -sin ^4 x)/(sin^2x)=cot^2x -1
*November 10, 2014*

**Early Childhood/Homem school and comm.**

Changed my answer to (d) makes more sense that you would try to understand each point of view
*November 10, 2014*

**Early Childhood/Homem school and comm.**

Changed my answer to (d0 makes more sense that you would try to understand each point of view
*November 10, 2014*

**Early Childhood/Homem school and comm.**

Which part of RERUN describes when you try to see both point of view? a. Reflect b. Explain c. Reason d. Understand I chose a
*November 10, 2014*

**Early childhood/home school and community**

Judging a child based on the way the child dresses is an example of: a. racism b. classism c. ageism d. gender bias I thought d
*November 10, 2014*

**Early Childhood**

Toys advertised on television play an important part in defining: a. gender b. differential treatment c. sex roles d. appearances I chose c
*November 10, 2014*

**Early Childhood**

At what age is it important to socialize a child to feel or not to feel? a. The first two months b. The first year of life c. The first two years of life d. the first four years I chose c
*November 10, 2014*

**Pre-Calc/Trig**

thanks for the help
*November 10, 2014*

**Pre-Calc/Trig**

Help please State the x and y-intercepts for each function. f(x)= -x^3+4x
*November 10, 2014*

**Early Childhood/Art and Creative Development**

early childhood/preschool/Kindergarten
*November 10, 2014*

**Early Childhood/Art and Creative Development**

Which of the following art activities might best be presented to children in a small group setting? a. Mobiles and stabiles b. Journals c. Art appreciation d. Fiction and nonfiction books about authors I chose (a) because mobiles require a lot of tying string and balancing ...
*November 10, 2014*

**Early Childhood**

Which is NOT an example of a student using a digital camera for documentation? a. Taking pictures of a growing tadpole b. Taking pictures of a tree as it changes during seasons. c. Taking pictures of peers as they grow throughout the year. d. Taking pictures of a subject at ...
*November 10, 2014*

**English**

I am given a task to write a description of a theme/amusement park. But I have no idea where to start. Please help? Things I should include: The 5 senses Some dialogue Personification Similies/metaphors Contrasts Sibilance Varied...
*November 10, 2014*

**Early Childhood/Art and Creative Development**

Which of the following would be an appropriate use of technology for an 18-month old child? a. watching a Baby Einstein Video b. Skyping with a traveling parent c. Listening to an audiobook. d. Playing Angry Birds (b) because I think Baby Einstein got bad reviews and ...
*November 10, 2014*

**Science**

Why does Potassium Nitrate crystallise when cooled and saturated?
*November 10, 2014*

**ap calc**

find the maximum value of f(x)= 3cos(x)-2sin(x) I know you have to take the derivative but after the derivative I don't know how to solve it. f'(x)=-3sin(x)-2cos(x)=0 I don't know what to do after this please help
*November 9, 2014*

**AP CALC**

the curve y=ax+ b/x has a relative minimum at the point (1,4). find the values of a and b. please help. I have no idea how to solve this.
*November 9, 2014*

**Trigonometry**

poop
*November 9, 2014*

**Trigonometry**

The wheelchair ramp is 4.4 m long. It rises 1.2 m. What is its angle of inclination to the nearest degree?
*November 9, 2014*

**ap calc**

find the maximum value of f(x)= 3cos(x)-2sin(x) I know you have to take the derivative but after the derivative I don't know how to solve it. f'(x)=-3sin(x)-2cos(x)=0 I don't know what to do after this please help.
*November 9, 2014*

**ap calc **

the curve y=ax+ b/x has a relative minimum at the point (1,4). find the values of a and b. please help. I have no idea how to solve this.
*November 9, 2014*

**ap calc**

let f(x)= bx^2+6x, if x< or equal to 2 ax^3, if x>2 find the values of a and b such that f(x)is differentiable at x=2 I need help with this question I know you have to set both functions equal to each other. but I don't know how to solve for a and b
*November 9, 2014*

**Math**

For the triangle BMW, where M is 90 degrees, the hypotenuse is 13 and the leg BM is 5, find cos W.
*November 9, 2014*

**Physics**

A 0.422-kg ball with a speed of 1.31 m/s rolls across a level surface toward an open 0.348-kg box that is resting on its side. The ball enters the box, and the box (with the ball inside it) then slides across the surface a distance of 0.473 m. What is the coefficient of ...
*November 9, 2014*

**Physics**

A 18 g bullet is fired into the bob of a ballistic pendulum of mass 1.4 kg. When the bob is at its maximum height, the strings make an angle of 60° with the vertical. The length of the pendulum is 2.3 m. Find the speed of the bullet.
*November 9, 2014*

**Physics**

A 0.9-kg block (mass m) and a second block (mass M) are both initially at rest on a frictionless inclined plane. Mass M rests against a spring that has a force constant of 12.2 kN/m. The distance d along the plane between the two blocks is 3.64 m. The 0.9-kg block is released...
*November 9, 2014*

**chemistry**

How do you write a balanced equation for the preparation of phenylmagnesium bromide and it's reaction with benzophenone followed by neutralization in acid?
*November 9, 2014*

**Physics**

Traveling at a speed of 22m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of friction between the tires and the road is 0.68. How much time does it take for the car to come to a halt? As usual, ignore the effects of air ...
*November 9, 2014*

**Early Childhood**

Changed my answer to (c) because consequences are a result of your actions. Any one else have thoughts on this
*November 9, 2014*

**biomechanics**

Consider an experiment where a subject lands during two conditions from a height of 0.2 m. During the first landing condition, the subject lands 'stiffly' (e.g., very little knee flexion). During the second landing condition, the subject lands 'softly' (e.g., ...
*November 9, 2014*

**English**

B.may have a plural subject. C.will need commas to separate three or more verbs. D.all of the above I am think A have a singular subject
*November 9, 2014*

**English**

A sentence with a compound predicate A. may have a single subject
*November 9, 2014*

**anthropology**

A key concept for understanding male dominance in gender-stratified societies is the idea of
*November 9, 2014*

**Chemistry **

Is my answer correct? Calculate the mass of frost (water ice) on a piece of dry ice that would completely react with 2 mmol of phenylmagnesium bromide. (1/44 CO2)*(0.002mol of phenylmagnesium bromide)= 0.0000455
*November 9, 2014*

**Pre-trig/Calc**

Please help me. Use Descartes' rule of signs to describe the roots for each polynomial function. 3. m(x)=x^3+3x^2-18x-40
*November 9, 2014*

**Math**

Can someone please check to see if I answered these true and false statements correctly? Thank you! 1. A triangle can have two right angles. (TRUE??) 2. An equilateral triangle is also an acute. (TRUE??) 3. A right triangle can also be an isosceles. (TRUE??) 4. A scalene ...
*November 9, 2014*

**government**

Democrats lost governor’s races in blue states like Massachusetts and Maryland.
*November 9, 2014*

**government**

Explain the results of the elections in Maryland
*November 9, 2014*

**government**

Donna Edwards didn't win right??
*November 9, 2014*

**government**

what will be the impact of this election on federal versus state power (federalism)
*November 9, 2014*

**government**

What effect does the result of the republican party winning the election have on the Obama presidency?
*November 9, 2014*

**chemistry**

1. (3.0x10^4) divided by (6.2x10^1) = 5x10^2? 2. (4.7x10^-3) divided by (9x10^-4) = 5x10^-6 3. (3.0x10^4) times (6.2x10^1) =1.9x10^6 4. (4.7x10^-3) divided by (9x10^-4) =5x10^-6 5. (5.1x10^2) divided by (3x10^4)
*November 9, 2014*

**geography**

How does life in Istanbul differ from life in rural Turkey? A) Istanbul is more modern than rural Turkey B) Women in Istanbul do not work outside the home, whereas they do work outside the home C) Istanbul does not have a mixed economy and rural Turkey does D) Istanbul is ...
*November 9, 2014*

**physics**

An air-cooled motorcycle engine loses a significant amount of heat through thermal radiation according to the Stefan-Boltzmann equation. Assume that the ambient temperature is T0 = 24.5°C (297.65 K). Suppose the engine generates 11.5 hp (8.58 kW) of power and, due to ...
*November 9, 2014*

**math**

A trail mix recipe calls for 6 cups of peanuts. You have 4 small packages that each contain 2/3 cup of peanuts. How many more cups of peanuts do you need to get?
*November 9, 2014*

**Chemistry**

If 500 mol of hydrogen gas occupies 5.00L at 25 celsius, what is the pressure in atm? I believe this is Ideal gas law. I can't figure out how to put it in the PV=nRT.
*November 9, 2014*

**Physics**

horizontal frictionless air track... why are you using Pi?
*November 8, 2014*

**history**

2. Roosevelt addressed the struggles of industry with the National Industrial Recovery Act (NIRA). Which of the following was not one of the main components of this effort? African American labor assistance Public works projects National Recovery Administration Fair practice ...
*November 8, 2014*

**Math**

In trapezoid CDEF, angle D = angle E=90degrees. Angle C =60 degrees, EF=4.5cm, and DE=3.5cm. What is the perimeter of the trapezoid to the nearest mm?
*November 8, 2014*

**Physics**

A small sphere of mass 2 kg is attached to the end of a cord of length 2m and rotated in a vertical circle about a fixed point O. Determine the tension in the cord at the lowest point of the trajectory if the speed at this point is 7m/s. Use g=9.8 m/s2.
*November 8, 2014*

**Physics**

A small sphere of mass 1 kg is attached to the end of a cord of length 1 m and rotated in a vertical circle about a fixed point O. If the speed at the uppermost point of the trajectory is 1 m/s, the sphere will have a circular trajectory (will move in a circle). Use g=9.8 m/s2.
*November 8, 2014*

**Physics**

A small sphere of mass 3 kg is attached to the end of a cord of length 2m and rotated in a vertical circle about a fixed point O. Determine the tension in the cord at the uppermost point of the trajectory if the speed at this point is 8m/s. Use g=9.8 m/s2.
*November 8, 2014*

**Physics**

A 1550 -kg car moves on a horizontal curved road. If the radius of the curve is 46 m and the coefficient of friction between the tires and road is 0.1, find the maximum speed the car can have so that it may not skid.
*November 8, 2014*

**Physics**

A coin is placed on a large disk which rotates uniformly at a rate of 2 rot/s. The coefficient of friction between the coin and the disk is 0.1. To what distance from the center of the disk should the coin be placed so that the coin may not slip? I know that mu times g (.1 x 9...
*November 8, 2014*

**Trigonometry**

An airplane approaches an airport. At a certain time, it is 939 m high. Its angle of elevation measured from the airport is 19.5◦. To the nearest metre, how far is the plane from the airport?
*November 8, 2014*

**Social Studies**

*know
*November 8, 2014*

**Social Studies**

yes I need to no which site I can read more about it so I can get ideas for my paper
*November 8, 2014*

**Social Studies**

information to show how the U.S. Constitution distributes and limits powers within the federal government.
*November 8, 2014*

**Math Question**

In △PQR, ∠R=90◦ ,∠P=58◦, and PR=7.1 cm. Determine the area of △PQR to the nearest tenth of a square centimetre.
*November 8, 2014*

**Spanish--1 question**

Why is it not always necessary to include a subject pronoun before the verb in Spanish?
*November 8, 2014*

**Spanish Help? Please.**

Explain how an interlocking schedule at a Puerto Rican school works. Why are interlocking schedules used? Why is it not always necessary to include a subject pronoun before the verb in Spanish? What is the heritage of many of the students at Miami High School? Explain why so ...
*November 8, 2014*

**Grammar**

Think critically or critically think
*November 8, 2014*

**chemistry**

3. If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the solution? [Use molecular weight: HCl, 36.46 amu] 5.20/36.46= 0.1426 X 3.00=0.428 M IS THIS CORRECT
*November 8, 2014*

**chemistry**

(4.7 x 10^-3 ) divided by (9 x 10^-4) = 5x10^-6
*November 8, 2014*

**chemistry**

so the first one is it 5x10^2?
*November 8, 2014*

**chemistry**

idk how you divide it
*November 8, 2014*

**chemistry**

so is this correct? 3rd is 1.86 * 10^6 4th is 1.53 * 10^7
*November 8, 2014*

**chemistry**

oh the question is to multiply and divide the significant figures ohh my mistake i thought i divided
*November 8, 2014*

**chemistry**

3rd is 1.86 * 10^6 4th is 1.53 * 10^7
*November 8, 2014*

**chemistry**

(3.0 x 10^4 ) ÷ (6.2 x 10^1) = 18.6x10^3 (4.7 x 10^-3 ) ÷ (9 x 10^-4) = 42.3x10^-7 (3.0 x 10^4 ) x (6.2 x 10^1) = 18.6x10^3 (5.1 x 10^2 ) x (3 x 10^4) = 15.3x10^-2
*November 8, 2014*

**Algebra 2**

Find x,y,z 2x-3y+z=-1 2x-y+2z=6 5x-4y+3z=6 Please show work I want to learn!!!
*November 8, 2014*

**MicroEconomics**

an accountant claims that she has found a legal way for Beth to shelter $3,000 of taxable income from the federal government. The maximum amount that Beth is willing to pay to learn this strategy and reduce her taxable income by $3,000 is
*November 8, 2014*

**Economic**

Beth is single and lives in New York. Beth earned $280,000 in 2011. The following table shows the IRS tax rates for a single taxpayer in 2011 On Taxable Income .. Tax Rates up to $8,500 10% From $8,500 to $34,500 15% From $34,500 to $83,600 25% From $83,600 to $174,400 28% ...
*November 8, 2014*

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