Monday

April 20, 2015

April 20, 2015

Total # Posts: 80,413

**Chemisty **

how many moles of hydrogen will be liberated from 200.0ml of 3.00M HCL reacting with an excess of magnesium?
*March 16, 2015*

**English**

Chapter One: 1 - no 2 - no 3 - yes 4 - yes 5 - yes Chapter Three: 1 - no (is Walter mentally ill?) 2 - yes 3 - yes 4 - yes 5 - you have not made a choice 6 - yes 7 - you have not made a choice 9 - yes, but the other answers don't make sense as you have copied them. She'...
*March 16, 2015*

**algbera**

What is the corresponding temp in 77 degrees Fahrenheit to degrees celsio us
*March 15, 2015*

**chemistry**

Your question is?
*March 15, 2015*

**MATH**

Suppose that 3% of all adults suffer from diabetes and that 29% of all adults are obese. Suppose also that 2% of all adults both are obese and suffer from diabetes. (a)Find the probability that a randomly chosen adult is obese, given that he or she suffers from diabetes. Round...
*March 15, 2015*

**Calculus**

For how many values of x will the tangent lines to y=4sinx and y=x^2/2 be parallel? A. 0 B. 1 C. 3 D. 4 E. Infinite Thanks.
*March 15, 2015*

**Calculus check**

A function f(x) is continuous for all x and has a local minimum at (1,8). Which must be true? A. f'(1)=0 B. f' exists at x=1 C. The graph is concave up at x=1 D. f'(x) is less than 0 if x is less than 1, f'(x) is greater than 0 if x is greater than 1 E. f'...
*March 15, 2015*

**Please check my calculus**

A conical tank has a height that is always 3 times its radius. If water is leaving the tank at the rate of 50 cubic feet per minute, how fast if the water level falling in feet per minute when the water is 3 feet high? Volume of a cone is V=1/3(pi)r^2h A. 1.000 B. 5.305 C. 15...
*March 15, 2015*

**Calc**

Find the derivative of: 1. Xlog base e (log base e X) 2. log base x 7 3. (sinh x)^2 - (cosh x)^2
*March 15, 2015*

**Physic**

1. Evaluate dF/dr when r=10,000, given that F= GmM/(r^2) and that F decreases by 3N/m when r=20,000. 2. The lowest point of a 5 meter long ladder is pulled away from a wall at 0.3 meters/sec. Find the rate at which the angle between the ladder and the wall changes when the ...
*March 15, 2015*

**math**

A cell phone company charges by the minute (and partial minute) for a phone call. Arionna’s plan includes 300 minutes in the $20 base cost. If she uses more than 300 minutes, there is a $5 overage fee and an additional charge of $0.25 per minute. Which graph represents ...
*March 15, 2015*

**Math**

Which of the following is true about a trend line for data? A. The minimum data point always lies on the trend line. B. Every data point must lie on the trend line. C. The trend line describes the pattern in the data if one exits. D. The trend line includes the effect of all ...
*March 15, 2015*

**precal**

whats (2√3)^2 equal to?
*March 15, 2015*

**Please check my calculus**

If x^2+xy-y=2, find dy/dx My answer: (2x+y)/(1-x)
*March 15, 2015*

**Calculus**

For f(x)=x^2/3(x^2-4) on [-2,2] the "c" value that satisfies the Rolle's Theorem is A. 0 B. 2 C. +or-2 D. There is no value for c because f(0) does not exist E. There is no value for c because f(x) is not differentiable on (-2,2)
*March 15, 2015*

**Calculus**

Let f be a function such that the limit as h approaches 0 [(f(5+h)-f(5))/h]=4. Which of the following must be true? I. f(5)=4 II. f'(5)=4 III. f is continuous at x=5 A. I only B. II only C. III only D. I and II only E. II and III only
*March 15, 2015*

**Calculus**

If f'(x)=sinx and f(pi)=3, then f(x)= A. Cosx+4 B. Cosx+3 C. -cosx+2 D. -cosx-2 E. -cosx+4
*March 15, 2015*

**Please check my Calculus**

Even? when plug n numbers into formula
*March 15, 2015*

**Please check my Calculus**

f(x)=x^n , where n is a positive integer greater or equal to 2. The graph of f(x) will have an inflection point when n is A. Even B. Odd C. Divisible by 3 D. For all values E. For no values I got B.
*March 15, 2015*

**English help**

In Star Wars: a new hope when did a father-son(uncle) experience separation?
*March 15, 2015*

**World history**

Revolutions of 1848
*March 15, 2015*

**World history**

"It was a town of red brick, or of brick that would have been red if the smoke and ashes had allowed it; but as matters stood, it was a town of unnatural red and black like the painted face of a savage. It was a town of machinery and tall chimneys, out of which ...
*March 15, 2015*

**Chem**

Silver nitrate and aluminum chloride react with each other by exchanging anions as shown below. 3 AgNO3 (aq)+ AlCl3 (aq) → Al(NO3)3 (aq) + 3 AgCl (s) How many moles of AgCl is produced when 1 mol of AgNO3 reacts with 1 mol of AlCl3?
*March 15, 2015*

**Calculus check**

E?
*March 15, 2015*

**Calculus**

If f(x) is a continuous function with f"(x)=-5x^2(2x-1)^2(3x+1)^3 , find the set of values for x for which f(x) has an inflection point. A. {0,-1/3,1/2} B. {-1/3,1/2} C. {-1/3} D. {1/2} E. No inflection points
*March 15, 2015*

**Calculus**

Nevermind. Sorry
*March 15, 2015*

**Calculus**

Not distribute. The integral. I'm confused on u-substitution.
*March 15, 2015*

**Calculus**

The integral of sqrt(x)(sqrt(x)+1) dx A. 2(x^3/2+x)+c B. x^2/2+x+c C. 1/2(sqrt(x)+1)^2+c D. x^2/2+2x^3/2/3+c E. x+2sqrt(x)+c
*March 15, 2015*

**Calculus**

If y=3x-7, x is greater than 0, what is the minimum product of x^2y? A. -5.646 B. 0 C. 1.556 D. 2.813 E. 4.841
*March 15, 2015*

**Calculus**

If the limit as x approaches infinity (6x^2/200-4x-kx^2)=1/2, then k= A. 3 B. -3 C. 12 D. -12 E. -3
*March 15, 2015*

**math**

A farmer has 100metres of fencing from which to build a rectangular chicken run. He intends to use two adjancent walls for two sides of the rectangular enclosure. Determine a formular for the enclosed area in terms of X?
*March 15, 2015*

**Calculus**

A conical tank has a height that is always 3 times its radius. If water is leaving the tank at the rate of 50 cubic feet per minute, how fast if the water level falling in feet per minute when the water is 3 feet high? Volume of a cone is V=1/3(pi)r^2h A. 1.000 B. 5.305 C. 15....
*March 15, 2015*

**Calculus**

For how many values of x will the tangent lines to y=4sinx and y=x^2/2 be parallel? A. 0 B. 1 C. 3 D. 4 E. Infinite
*March 14, 2015*

**English Grammer**

Please Help Check My Answers. 1. *****A. "The leaves," she explained, "can be anywhere from two to eight inches long." B. Nan said, "It can also have dark or light green leaves". C. "Also," she added. "the leaves' edges can be ...
*March 14, 2015*

**Calculus**

A function f(x) is continuous for all x and has a local minimum at (1,8). Which must be true? A. f'(1)=0 B. f' exists at x=1 C. The graph is concave up at x=1 D. f'(x) is less than 0 if x is less than 1, f'(x) is greater than 0 if x is greater than 1 E. f'(...
*March 14, 2015*

**PreCalculus**

I tried to do these questions, however I can't seem to get the answer. Can someone help me? I would really appreciate it. _____________________________________ Mathematical Induction Prove that the statement in true for every positive integer n. 1. 1/1*2*3 + 1/2*3*4 + 1/3*...
*March 14, 2015*

**Calculus**

The circumference of a circle is increasing at a rate of 2pi/5 inches per minute. When the radius is 5 inches, how fast is the area of the circle increasing in square inches per minute? A. 1/5 B. pi/5 C. 2 D. 2pi E. 25pi
*March 14, 2015*

**Calculus**

In the next questions, a particle is moving along a horizontal line according to the formula: s=2t^4-4t^3+2t^2-1 a) the particle is moving right when A. 0 is less than t is less than 1/2 B. t is greater than 0 C. t is greater than 1 D. 0 is less than t is less than 1/2, t is ...
*March 14, 2015*

**Calculus**

f(x)=x^n , where n is a positive integer greater or equal to 2. The graph of f(x) will have an inflection point when n is A. Even B. Odd C. Divisible by 3 D. For all values E. For no values
*March 14, 2015*

**Calculus**

If y=3/(sinx+cosx) , find dy/dx A. 3sinx-3cosx B. 3/(sinx+cosx)^2 C. -3/(sinx+cosx)^2 D. 3(cosx-sinx)/(sinx+cosx)^2 E. 3(sinx-cosx)/(1+2sinxcosx)
*March 14, 2015*

**Calculus**

The limit as x approaches 4 ((-3x+1)/(x-4)^2) is A. -11 B. -13 C. Infinity D. Negative infinity E. DNE
*March 14, 2015*

**science**

I just saw it! I submitted the questions and it was trachea. It is OK!! Thank you anyway!!!!!!!!!!!!!!
*March 14, 2015*

**science**

The passageway that takes air from your throat to your lungs is called the pharynx*** larynx alveoli trachea
*March 14, 2015*

**Chemistry help**

Write two molecular formulas that reduce to each to each of the given empirical formulas. Do not include the given empirical formulas. 1. Al2(SO4)3 . Cr(CN)3
*March 14, 2015*

**Chemistry help**

washing soda is a hydrate of sodium carbonate. a 2.714 g sample of washing soda is heated until a constant mass of 1.006 of na2co3 is reached. what is the mass of the water evaporated? what is the percent water in the compound?
*March 14, 2015*

**algebra2**

cuberoot(n+8)-6=-3
*March 14, 2015*

**algebra2**

cuberoot(n+8)-6=-3
*March 14, 2015*

**algebra2 **

(x-5)^1/3 -4=-2
*March 14, 2015*

**Physics - Mechanics**

A small block of mass 1.2 kg is launched by a compressed spring with force constant k=600 N/m. The initial compression of the spring is 0.15 m. The block slides along a horizontal frictionless surface and then up an inclined plane that makes an angle θ=40˚ with the ...
*March 14, 2015*

**Physics - Mechanics**

A large box of mass M is at rest on a horizontal table whose surface is rough; the coefficient of static friction between the table and the block is μ. The box is connected by a taut string to a small block of unknown mass m, initially held horizontally as shown and then ...
*March 14, 2015*

**Physics - Mechanics**

A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the block (In terms of M, m ...
*March 14, 2015*

**Science**

Which of the following may have happened if the inner planets had greater masses during the formation of the solar system? A. The inner planets may have been even smaller and rockier. B. The inner planets may have been larger and more gaseous. C. The inner planets may each ...
*March 13, 2015*

**chemistry**

A solution of fructose, C6H12O6, a sugar found in many fruits, is made by dissolving 22.0 g of fructose in 1.00 kg of water. What is the molal concentration of fructose the solution? What is the mole fraction of fructose in the solution? What is the mass percent of fructose in...
*March 13, 2015*

**chemistry**

describe how you can prepare 500cm of0.1m of standard hydrochloric acid from commercial concentrated HCL of density 1.18g/cm and percentage by 37%
*March 13, 2015*

**Science**

Which of the following planets is considered a rocky, or terristrial, planet? A. Venus B. Neptune C. Saturn D. Uranus Is the answer A? Thank you
*March 13, 2015*

**math**

What is the average of all of the integers from 17 to 55?
*March 13, 2015*

**LA**

Thank you Ms.Sue
*March 13, 2015*

**LA**

What is the prepositional phrase in the following sentence? The food and the extra water were kept in storage cabinet. A. The food B. and extra water C. were kept D. in the storage cabinet Is the answer D? Thank you for your help.
*March 13, 2015*

**LA**

Thank you for your time.
*March 13, 2015*

**LA**

In which of these lines is the meaning of the word resent best expressed? A. "Suppose you try kepping still for five minutes." B. "Anne, dear, don't be such a baby." C. "You know we're going to forget how to dance...When we get out we wont ...
*March 13, 2015*

**LA**

Which expression best represents the view a fatalist would have? A. "Whatever will be, will be." B. "The best is yet to come." C. "We are still masters of our fate." D. "You don't know what you have until its gone." Could the answer...
*March 13, 2015*

**French**

Merci Mme, Mrs. Sue. Could you please delete this question for privacy purposes?
*March 13, 2015*

**French **

I am working on my French homework (direct/indirect) and would like to check my answers and make sure I am on the right track. I am having difficulty with the following: Options: Me/m’, te/t’, nous, vous, le, la, les, lui, leur, y, en A. Je vais au café ...
*March 13, 2015*

**Math**

Thank you
*March 13, 2015*

**Math**

Oh ok I reread it is the answer D? Thank you
*March 13, 2015*

**Math**

What is the term for data that are grouped closely together? A. Outlier B. Linear C. Positive D. Clustering Is the answer C? Thank you for your help.
*March 13, 2015*

**health. please help! #6**

Oh Yeah I said B. Is that right?
*March 13, 2015*

**health. please help! #6**

6. It is the middle of winter and like everyone else you have caught a cold, your body relies on your ______ to help you boost your immune system. A. Plasma B. Red Blood Cells C. White Blood Cells D. Platelets
*March 13, 2015*

**Health**

anybody?! Am I Correct?
*March 13, 2015*

**Health**

3. The muscular system allows our bones to: A. Strenthen B. Contract C. Lenghthen D. Move***** 4. This muscle helps to transport blood to and from the heart: A. Smooth Muscle***** B. cardiac Muscle C. Skeletal Muscle D. Invoulntary Muscle 5. The blood vessels that return blood...
*March 13, 2015*

**english**

The principal parts of a verb are A. present tense, past tense, future tense. B. present tense, present participle, past tense, past participle. C. base form, helping verb, past participle. D. base form, past tense, past participle, future tense.
*March 13, 2015*

**Physics - Mechanics**

A small block of mass 1.2 kg is launched by a compressed spring with force constant k=600 N/m. The initial compression of the spring is 0.15 m. The block slides along a horizontal frictionless surface and then up an inclined plane that makes an angle θ=40˚ with the ...
*March 13, 2015*

**Physics - Mechanics**

A large box of mass M is at rest on a horizontal table whose surface is rough; the coefficient of static friction between the table and the block is μ. The box is connected by a taut string to a small block of unknown mass m, initially held horizontally as shown and then ...
*March 13, 2015*

**Physics - Mechanics**

A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the block (In terms of M, m ...
*March 13, 2015*

**Science Help Please**

what did you get on the test
*March 13, 2015*

**Science Help**

Soundproof rooms take advantage of which property of waves? A. Absorption B. Regular reflection C. Refraction D. Diffuse reflection Is the answer C? Thank you for your help and time.
*March 13, 2015*

**LA**

1. In which sentence does the prepositional phrase act as an adjective? A. In the morning, we rested in bed. B. We bought the cookies in the red package. C. During the day, Peter playes with the cat. D. My sister is good at dancing. 2. Which expression best represents the view...
*March 12, 2015*

**social studies**

Parts of Europe people work fishing
*March 12, 2015*

**Art**

Which movie professional creates the storyboard? A. Screenwriter B. Production designer C. Director D. Graphic artist Is the answer D? Thank you for your help.
*March 12, 2015*

**Art**

it was right
*March 12, 2015*

**Art**

It don't. Thats why I am confused.
*March 12, 2015*

**Art**

How might a cinematographer create a believable scene in nature? A. Through research of plants and animals. B. Through adjustment of props. C. Through lighting techniques that mimic natural light. D. Through close-up filming techniques. Is the answer c? Thank you
*March 12, 2015*

**Art**

No, D would need C and A. So B.
*March 12, 2015*

**Art**

What twenty-first century technology has allowed artists to reproduce a hard copy of two-dimensional work such as a painting cheaply and quickly? A. Printer B. Camera C. Computer D. Internet Is the answer A? Thank you for the help.
*March 12, 2015*

**Art**

I got it wrong the answer was B.
*March 12, 2015*

**Art**

Thank you for your time.
*March 12, 2015*

**Art**

I meant B.
*March 12, 2015*

**Art**

Realists reacted to the industrial Revolution by creating what types of paintings? A. Images of the wealthy. B. Images of the middle class. C. Images of soliders D. Images of despair. Is the answer C? Thank you for your help.
*March 12, 2015*

**Art**

Thank you.
*March 12, 2015*

**Art**

The United States Supreme Court's acrhitectual design symbolizes what values that are also shares with Greek culture? A. Resistance and persistance. B. Creativity and love. C. Tranquility and peace. D. Balance and justice. Is the answer D? Thank you for the help.
*March 12, 2015*

**Art**

it is bridges
*March 12, 2015*

**Art**

It was A.
*March 12, 2015*

**Art**

There isnt an all of the above
*March 12, 2015*

**Art**

I'm a little confused on this. The Greek arch can typically be seen in what American structure? A. Bridges B. Courthouses C. Captial buildings D. Libaries. Is the answer D?
*March 12, 2015*

**Math**

Several friends each had 2/5 of a bag of peanuts left over from a baseball game. They realized that they could have bought 2 fewer bags of peanuts between them. How many friends went to the game
*March 12, 2015*

**math **

The area is 40 squear feet .what is the area of this figure?
*March 12, 2015*

**Art**

I strongly believe so. Please, I beg you to tell me if I'm wrong. Thanks so much :)
*March 12, 2015*

**Art**

The towers of St. Balsil's Cathedral in Russia are symbolic of what events? A. Eight festivals. B. Eight religious dances. C. Eight battles. D. Eight local holidays. Is the answer C? Thank you
*March 12, 2015*

**life orientation**

To what extent can interpersonal conflict affect communication, choice of career and job performance when employed?
*March 12, 2015*