# Posts by Angie

Total # Posts: 1,405

**chemistry**

What is the amount of H2O that can be produced by combining 89.7 of each reactant in the following equation: 4NH3(g) + 5O2 (g)----> 4NO(g) + 6 H2O(g)

*March 15, 2013*

**pos and neg inf limits**

sorry what is O, i don't understand

*March 13, 2013*

**pos and neg inf limits**

Help with this please?

*March 13, 2013*

**pos and neg inf limits**

x-> + infinity (x-sqrt(x^2-3x)) for this i got 3, because after it is rationalized i got 3x/x= 3 x-> - infinity (3x^2+4x+2)/(5-x+x^3) i got 3/x , and zero as the final answer are they right. thank you.

*March 13, 2013*

**Absolute Value and Limits**

Help with this one ?

*March 13, 2013*

**Absolute Value and Limits**

solve for limits of 1+ and 1- for this function: (x^2 + abs (x-1) - 1)/ abs (x-1) i don't know how to simplify abs. value expression times polynomial. can someone please help.

*March 13, 2013*

**calculus**

i don't get why you would multiply the numerator by that. please explain

*March 13, 2013*

**calculus**

as x-> + infinity (limit) 3x^4-2x^2/x^4+5x^2 i got positive infinity. is this right

*March 13, 2013*

**Calculus**

I know how to do this problem, but I'm stuck at the arc length differential. Set up an integral for the arc length of the curve. (Do not evaluate the integral) x=y^2ln(y), 1<y<2 dx/dy = 2yln(y) + y ds= sqrt (1 + (2yln(y)+y)^2 so far I have sqrt (1 + 4y^2ln(y) + 2[2y^...

*February 28, 2013*

**Science**

in what ways do you think earth's moon may be similar to mercury

*February 23, 2013*

**math $$**

k ty i have 4 more *so sorry* Carson wanted to make a cylindrical pillow for his mother's b-day the pillow was to be 15 inches long with a diameter of 6 inches and would be filled with stuffing. determine how many cubic inches of stuffing carson will need to make the ...

*February 21, 2013*

**math $$**

k ty i have 4 more *so sorry* Carson wanted to make a cylindrical pillow for his mother's b-day the pillow was to be 15 inches long with a diameter of 6 inches and would be filled with stuffing. determine how many cubic inches of stuffing carson will need to make the ...

*February 21, 2013*

**math $$**

ok but that is not one of the answers and it can't be reduced

*February 21, 2013*

**math $$**

ty sooooo much another question (sorry about all these just trying to get this done and learn it before tom.) Jennie calculated the probabilities of various events involving a coin. What is the probability of a coin landing on heads at least twice when the coin is flipped ...

*February 21, 2013*

**math $$**

sorry knights my computer was messying up so...

*February 21, 2013*

**math $$**

The graph of 5x-2y=10 intersects the x-axis and y-axis what are the order pairs for these two points of intersection? A.(2,0) and (0,5) B.(2,0) and (0,-5) C.(-2,0) and (0,5) D.(-2,0) and (0,-5)

*February 21, 2013*

**math $$**

again sorry did it again

*February 21, 2013*

**math $$**

ty sooooo much another question (sorry about all these just trying to get this done and learn it before tom.) Jennie calculated the probabilities of various events involving a coin. What is the probability of a coin landing on heads at least twice when the coin is flipped ...

*February 21, 2013*

**math $$**

The graph of 5x-2y=10 intersects the x-axis and y-axis what are the order pairs for these two points of intersection? A.(2,0) and (0,5) B.(2,0) and (0,-5) C.(-2,0) and (0,5) D.(-2,0) and (0,-5)

*February 21, 2013*

**MATH PLZ**

ty both so much

*February 21, 2013*

**MATH PLZ**

Which is true when a negative nuber is subtracted from a positve number? A.the difference is always 0 B.the difference is always positive C.the difference is always negative D.the difference could be negative or positive *i need examples to

*February 21, 2013*

**Math plz fast i really need it**

i don't get it can you explain it better plz

*February 21, 2013*

**Math plz fast i really need it**

neither mind but can u help with the second

*February 21, 2013*

**Math plz fast i really need it**

okay but can you explain it better plz

*February 21, 2013*

***math***

The graph of 5x-2y=10 intersects the x-axis and the y-axis what are the ordered pairs for these two pairs of intersection A.(2,0) and (0,5) B. (2,0) and (0,-5) C.(-2,0) and (0,5) D. (-2,0) and (0,-5)

*February 20, 2013*

**Grammar**

one last question sorry: Which is correct? (1) He took the news bad. (2) He took the news badly.

*February 19, 2013*

**Grammar**

what prefix turns the word "town" into a word meaning "center of town"?

*February 19, 2013*

**early childhood education**

A poem that does not ryme is called: a. free verse. b. narrative. c. a lyric. d. nonfiction.

*February 15, 2013*

**solar system**

which planet has enough gravity to hold on to most gases?

*February 13, 2013*

**space science**

What other challenges do you think there would be for engineers designing a spacecraft to travel to mercury?

*February 7, 2013*

**math**

Yes it is

*February 7, 2013*

**math**

Yes she is correct

*February 5, 2013*

**Math**

suppose that the volumes of four stars in the milky way are 2.7x10^8 km^3, 6.9x10^4 km^3, 2.2x10^12 km^3, and 4.9x10^12 km^3. what is the order of the stars from least to greatest volume?

*January 24, 2013*

**social studies**

people how developed th caste system

*January 14, 2013*

**Math**

Oh okay thank you

*January 7, 2013*

**Math**

When we are plotting something, does the y axis go first or the x axis?

*January 7, 2013*

**Psychology**

Sorry....B should say B. psychodynamic therapy and humanist therapy D. family intervention therapy and behavioral skills training

*January 3, 2013*

**Psychology**

Gayla's treatment for bulimia and binge eating has been highly successful. It is most likely that her treatment involved a combination of: A. cognitive therapy and behavior therapy B. psychodynamic therapy and behavioral skills training C. systematic desensitization and ...

*January 3, 2013*

**psychology**

At the age of four months, Zach was excitable and fearful. His dad taped a colorful picture beside the changing table to entertain Zach during diaper changes. Zach overreacted to the picture and became agitated and nervous. During his school years, Zach is most likely to: A. ...

*January 3, 2013*

**Math**

6/2(1+2)=

*January 2, 2013*

**psychology**

To ensure that the memory of a child is accurate, it is important to: A. ask him to draw a picture of the event B. reward him for telling what happened C. reassure him that his friends have had the same experience D. avoid the use of leading questions or suggestion

*January 2, 2013*

**Math**

A gas tank is 1/4 full. Abby adds 4 gallons and now it is 5/8 full. How many gallons does the tank hold?

*December 11, 2012*

**Math**

The line L has equation of 4x + 3y = 7. Find the equation of the line perpendicular to L which passes through the point of intersection of L and the y-axis. Give answer in ax + by + c = 0.

*December 9, 2012*

**statistics**

What is the z-score for a test score of 440 in which the test has a normal distribution of N(400, 50)?

*December 4, 2012*

**Advanced Accounting**

GAAP rules are clear about when a company needs to consolidate or not, but companies tend to find loopholes to circumvent this rule. GAAP clearly indicates that consolidated financial statements are “usually necessary for a fair presentation when one of the companies in ...

*December 3, 2012*

**Advanced Accounting**

Mr. White (invested $20,000) and Mr. Black (invested $10,000) are in a partnership to run a marketing firm. They share profits and losses in the ratio of 2:1, which is also the ratio of their initial investment in the business. Mr. White manages the office but Mr. Black gets ...

*December 3, 2012*

**Advanced Accounting**

Mr. Right and Mr. Wrong own an antique store in a partnership. They share profits and losses equally and receive an annual salary of $50,000, as per the partnership agreement. Mr. Right travels the country buying antiques. Mr. Wrong manages the store. From time to time, they ...

*December 3, 2012*

**Science**

The process of changing free nitrogen gas into a usable form of nitrogen is called?

*December 2, 2012*

**Algebra**

q+2/5 = 2q-11/7

*December 2, 2012*

**physics**

The hot reservoir for a Carnot engine has a temperature of 926 K, while the cold reservoir has a temperature of 441 K. The heat input for this engine is 3730 J. The 441-K reservoir also serves as the hot reservoir for a second Carnot engine. This second engine uses the ...

*December 1, 2012*

**physics**

The wattage of a commercial ice maker is 226 W and is the rate at which it does work. The ice maker operates just like a refrigerator and has a coefficient of performance of 3.90. The water going into the unit has a temperature of 15.0°C, and the ice maker produces ice ...

*December 1, 2012*

**physics**

After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in entropy can be shown to be...

*December 1, 2012*

**Physics HELP!!**

A loudspeaker is placed between two observers who are 113m apart, along the line connecting them. If one observer records a sound level of 51.8dB and the other records a sound level of 75.8dB, how far is the speaker from each observer? Enter the longest distance first.

*November 30, 2012*

**Physics**

A 71.4cm long tube has a 71.4cm long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. As the insert is slowly pulled out, the sound from the tuning fork creates standing waves in the tube when the total length L is 77.5cm, 126.0cm, and ...

*November 30, 2012*

**Math**

A microscopic worm is eating its way around the inside of a spherical apple of a radius of 6 cm. What is the probability that the worm is within 1 cm of the surface of the apple? ( hint: v=4/3pier^3 where r is the radius)

*November 25, 2012*

**Math**

two dice a. find the odds in favor of the following events: 1 getting a sum of 7 2 getting a sum greater than 3 3 getting a sum that is an even number b. find the odds against each of the events in part a

*November 24, 2012*

**Math**

a spinner is spun whose central angles are all 45 degrees. #'s 1-8 on wheel. What is the probability that it lands on 5 if you know the following? a. it lands on an odd # b. it lands on a # greater than 3 c. it does not land on 7 or 8 d. it lands on a factor of 10

*November 24, 2012*

**Math**

2 dice are thrown. a. find the odds in favor of the following events: 1. getting a sum of 7 2. getting a sum greater than 3 3. getting a sum that is an even number b. find the odds against each of the events in part a

*November 24, 2012*

**Math**

Publishers records state: 20% of books published break even. 30% lose $1000. 25% lose $10,000. 25% earn 20,000. When a book is published, what is the expected income for the book?

*November 24, 2012*

**Math**

Box contains 4 white balls and 8 black balls. Pick a ball with your left hand, and don't look, pick a ball with your right hand, and don't look at it either. a. what is the probability the ball in your left hand is white? b. Next, you look at the ball in your right ...

*November 24, 2012*

**Math**

I figured it out never mind. a. is 1/3 because 4 of 12 balls are white, you pick with your left hand first, so all balls are still there. b. 1 ball is gone, so there are 4 white 7 black, therefore 11 balls left. 4/11 is the probability that the ball in your left is white.

*November 24, 2012*

**Math**

Box contains 4 white balls and 8 black balls. Pick a ball with your left hand, and don't look, pick a ball with your right hand, and don't look at it either. a. what is the probability the ball in your left hand is white? b. Next, you look at the ball in your right ...

*November 24, 2012*

**Math**

You come home after dark, and porch light is out. You cannot tell which key opens the door.. you randomly try the 5 keys on your ring, 2 keys open your door. Draw a tree diagram for the experiment & Find the probability of opening the door on the first or second try.

*November 24, 2012*

**Can someone help with this?**

Guess you don't know then why comment

*November 19, 2012*

**Can someone help with this?**

Sorry, yes

*November 19, 2012*

**Can someone help with this?**

A psychologist is performing an experiment involving a controlled group and an experimental group. With the experimental group, the psychologist is giving a placebo and labeling it as caffeine pill. The control group receives a caffeine pill, which is noted as such. Which of ...

*November 19, 2012*

**Psychology**

A psychologist is performing an experiment involving a controlled group and an experimental group. With the experimental group, the psychologist is giving a placebo and labeling it as caffeine pill. The control group receives a caffeine pill, which is noted as such. Which of ...

*November 18, 2012*

**Math**

First period: 85, 83, 74, 70, 88,95,89,72,90,83,77,91,98,89,82,84 Second period: 95,89,82,81,72,69,100,97,75,91,82,79,96,81,80,95,89,97,83,71 Mark is a student in the first period class. His score on the exam was 95%. Zoe is a student in the second period class, she also ...

*November 14, 2012*

**Math**

Dorian's score of 558 on the writing portion of the 2009 SAT exam placed him in the 72nd percentile. If the mean on this exam was 493, what was the standard deviation?

*November 13, 2012*

**Accounting**

In 20X0, ABC company purchased machine for $300,000 that had a useful life of 5 years, with a salvage value of $50,000 at the end its life. Depreciation was calculated over 2 years on straight-line basis. In 20X2, it determined that the total life should be 10 years with the ...

*November 9, 2012*

**chemistry... HELPP**

What is the cell potential for the reaction Mg(s) + Fe^2+(aq) -----> Mg^2+(aq) + Fe (s) at 63 degrees celsius when [Fe^2+]= 3.30 M and [Mg^2+]= 0.110 M

*November 3, 2012*

**chemistry**

Balance the following equation: K2CrO4+Na2SO3+HCl--->KCl + Na2SO4+CrCl3+H2O Enter the coefficients for each compound, separated by commas, in the order in which they appear in the equation (e.g., 1,2,3,4,5,6,7).

*November 2, 2012*

**physics ..PLEASE HELP ASSIGN DUE SOON :(**

Forces of 11.1N north, 19.9N east, and 14.0N south are simultaneously applied to a 3.62kg mass as it rests on an air table. What is the magnitude of its acceleration? I already did this part and i got 5.56 m/s^2 BUT PLEASE HELP ME WITH part b!! b)What is the direction of the ...

*October 31, 2012*

**physics ..PLEASE HELP ASSIGN DUE SOON :(**

an object on an inclined ramp of mass 1.39kg. The angle of the inclined surface is 29deg with the horizontal. The object on the ramp is connected to a second object of mass 2.17kg on a horizontal surface below an overhang that is formed by the inclined surface. Further, an ...

*October 31, 2012*

**Physics HELP!!**

A 7.37kg fish is held by a taut string. If the fish is accelerated upward at a rate of 3.62m/s^2, what would be the tension in the string?

*October 31, 2012*

**Physics HELP!!**

two horizontal forces F1 and F2, acting on an object of mass 1.11kg. The magnitude of F1 is 27.56N. The object moves strictly along the horizontal x-axis, which we choose as positive to the right. Find the magnitude of F2 if the object has a horizontal acceleration of 8.4m/s^2...

*October 31, 2012*

**Physics HELP!! pleasee**

an object on an inclined ramp of mass 1.39kg. The angle of the inclined surface is 29deg with the horizontal. The object on the ramp is connected to a second object of mass 2.17kg on a horizontal surface below an overhang that is formed by the inclined surface. Further, an ...

*October 28, 2012*

**Physics**

A 7.37kg fish is held by a taut string. If the fish is accelerated upward at a rate of 3.62m/s^2, what would be the tension in the string?

*October 28, 2012*

**Physics**

Determine the stopping distance for a skier moving down a slope with friction with an initial speed of 20.6m/s. Assume μk=0.178 and θ=5.27.

*October 28, 2012*

**Physics HELP!!**

Two masses of 3.40kg and 4.55kg are connected by a light string that passes over a frictionless pulley. Determine the tension in the string. b). Calculate the acceleration of m

*October 28, 2012*

**Geometry**

Below is a worksheet I have to do for my geometry class. I am not sure about the answers I have given and I have no clue about the ones not answered. Any help will be much appreciated and thank you in advance. A. Determine the number of triangulations for a hexagon. 5 B. How ...

*October 24, 2012*

**Financial Management**

As the financial analyst for a corporation, you are evaluating various types of bonds. The firm is gathering research about bonds currently issued. Understanding how to properly value a vanilla bond (a plain bond) is essential for finance. 1) What makes each of the different ...

*October 23, 2012*

**Accounting**

Financial Accounting 1. The following information was made available from the income statement and balance sheet of Meranda Company: ITEM 12/31/2010 12/31/2009 Accounts Receivable $ 42,000 $ 45,100 Accounts Payable 27,900 24,500 Merchandise Inventory 68,000 63,000 Sales (2010...

*October 19, 2012*

**Algebra**

I cannot solve the problem please help me. I'm suppose to set the equations up to solve for t. x = y + rt + at^2/2 Even when I plug in the values I don't get the answer. x = 16.4 y= 0 r= 0*cos(45)a=0 t is suppose to equal 2.32 if I set the problem up correctly.

*October 11, 2012*

**Landforms-history**

A plateau

*October 4, 2012*

**Health Care Management**

During the health care debate in Congress Republicans were accused of wanting to "Kill Granny". Is David Blumenthal implying something along the same lines as Congressional Republicans are purported to support? How can this issue be addressed?

*October 4, 2012*

**Algebra**

I have to use this equation to get the answer (t)=time. V=S+a*t I divided t by both sides, but get a little confuse do I divide V by both sides as while is the answer: t = V/s+a/S??

*October 4, 2012*

**Geometry**

Complete Problem #28 in Section 1.5 Exercises (Chapter 1) of Essentials of Geometry for College Students. Use the table below to show your work and solve the problem. You may add or delete rows as necessary. Statements Reasons PQ=RS Given PS=PQ+RS Segment Addition Postulate PR...

*October 4, 2012*

**Physics**

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.50m/s. During the second part, she rides for 36 minutes at an average speed of 4.30m/s...

*September 29, 2012*

**Chemistry**

How can you calculate activation energy in (kj/mol)? When all that is given is inverse temperature, and natural log reaction constant? Inverse: 1/278 for Kelvin temp, 1/308 Natural Log Reaction Rate Constant: 4.3 5.5

*September 25, 2012*

**Chemistry**

How do you do the inverse of absolute temperature? My kelvin temperatures are: 298 308 318 328 338 348 358 368 378 Taking the natural log of both sides of both sides of the equation gives ln(k) = ln(A) – E/RT. Thus, a graph of the natural log of the reaction rate constant...

*September 25, 2012*

**Calculus**

I'm having problems with this one. Can't get the right answer. Differentiate the following using the chain rule. f(x) = squareroot(x^2+1)/(3x+1) I know that I can take the whole thing and put it to the (1/2) and differentiate that then use the quotient rule to ...

*September 22, 2012*

**Physics/Chemistry**

I am not producing the correct answer which is 2.06 psia. Question: The pressure gauge on the steam condenser for a turbine indicates 26.2 in. Hg of vacuum. The barometer reading is 30.4 in. Hg. What is the absolute pressure in the condenser in psia? I know that 1 in. Hg = 0....

*September 18, 2012*

**4th grade math**

I have 5 ones and 19 hundredths. What number am I?

*September 17, 2012*

**Chemistry/Math**

I'm not sure how to approach this problem. A manometer uses kerosene, specific gravity 0.82 as the fluid. A reading of 5 inches on the manometer is equivalent to how many millimeters of mercury?

*September 17, 2012*

**algebra**

im having trouble with subsets.. name the subsets to which the numbers belong 3/4 0 -6 square root of 7 5

*September 17, 2012*

**Chemisty/Physic**

How can I find the pipe diameter when given the velocity = 1 m/s and the volumetric flow rate = 6000 m^3/day and flow area = 6000 m^2/s So that everything cancels leaving me with meters so I can write my answer in cm.

*September 13, 2012*

**biology**

what is the mass in grams of 1.03 kg 1105g and 1075000mg

*September 12, 2012*