Thursday
July 31, 2014

Posts by Chris


Total # Posts: 2,149

math
Explain vertices and edges

microeconomics
lol mayybe... did you get the answer?

microeconomics
Consider the markets for pizza and fried chicken. Show graphically and explain the impact(s) you would expect if technological change leads to the development of a pizza oven that is both much cheaper and uses less energy than current ovens.

microeconomics
What condition must be met in order to conclude that an economy is maximizing social well-being? Do the equilibriums given by individual markets necessarily lead to the maximization of social well-being (that is, if demand is equal to supply, can you conclude that well-being i...

7th grade math
x-14=-3 one step equation

math
Use integration by parts to verify |(from -pi to +pi)cosmxcosnxdx = pi when m=n and |(from -pi to +pi)cosmxcosnxdx = 0 when m and n are not equal.

math
integration of x^2 * cos^2(x)

Chemistry
Which of the following aqueous solutions are good buffer systems ? . 0.26 M hydrochloric acid + 0.24 M potassium chloride . 0.14 M acetic acid + 0.20 M potassium acetate . 0.16 M potassium hypochlorite + 0.23 M hypochlorous acid . 0.31 M hydrocyanic acid + 0.28 M potassium cya...

Math
Write 1.87 as a mix number

Business Communication
I agree

physical science
If 22 grams of water are saturated at 75 degrees celsius with potassium nitrate and then cooled to 40 degrees celsius, how much will precipitate?

Calculus II
Find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0,y= 6 +x^{8} about the y-axis.

algebra
Mat116 appendix F problem #2 2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they o...

chemistry
A sample containing 0.0500mol of Fe2(SO4)3 is dissolved in enough water to make 1.00L of solution. This solution contains hydrated SO4 2- and Fe(H2O)6 3+ ions. The latter behaves as an acid: Fe(H2O)6 3+ --> Fe(H2O)5OH 2+ + H+ a) Calculate the expected osmotic pressure of th...

physics lab
Consider different points along one spoke of a wheel rotating with constant angular velocity. Which of the following is true regarding the centripetal acceleration at a particular instant of time? A The magnitude of the centripetal acceleration is greater for points on the spo...

English
1.It was so cold that the water in the fountain had _____. (freeze) 2.Masato's bike has _____ on the sidewalk all day. (lie) 3.Shelia has never ____ a mountain bike. (ride) 4.Last sprin Urbi and Joe _____ every morning. (swam) 5.Has the rider been _____ off the horse?(thro...

8th Grade Probability
12/5

Math
Factor Completey: f(x)= x^7 +2x^6 -8x^5 -10x^4 +19x^3 +8x^2 -12x

algebra
Why does the inequality sign change when both sides ar multiplied or divided by a negative number?

statistics
76% of toddlers get their immunization. Suppose that 6 toddlers are selected at random. What is the probability that at least one has not received the recommended immunization?

Physics
zero work, no force in direction of motion

Energy and momentum Physics
two cars, one with mass m1=1000kg and the other with mass m2= 4000kg crash in an intersection. Before the crash, car m1 was headed east with a speed of v1i= 25 m/s and the car m2 was headed north with a speed of v2i= 10m/s. After the crash, the cars stick together. what is the...

Math
That was a huge help. Thank you!!!

Math
Karen can be paid in one of two ways for selling insurance policies: Plan A:A salary of $750 per month, plus a commission of 10% of sales. Plan B:A salary of $1000 per month, plus a commission of 8% of sales in excess of $2000. For what amount of monthly sales is plan A better...

essay writing
rong i put that as my answer and it was rong

Math
Could someone please help me solve this problem, the age numbers that I am working with are 10yrs old 55yrs old and 75yrs. old. I need to know at my age of 55, in years, how old was the older person of 75 when I was born? Could you please write an equation that models how old ...

math
actually dont answer that im stupid. i hand by calculator in rad rather than deg. sorry. have a great rest of the day.

math
a boy walks 50m from the bottom of a building lies down and notes that he has to raise his eyes through 42 degree from the horizontal. what is the height of the building? i am doing tan(42)=x/50 but the answer is supposed to be 45m. how do i get that?

algebra
-7x-22=-24 1/3 could someone help me Im confussed

us history
what issues did the compromise of 1850 leave unsettled

please help me paraphrase
"The truth is that the reader is always right. Chances are, if something you’re reading doesn’t make sense, it’s not your fault—it’s the writer’s. And if something you write doesn’t get your point across, it’s probably not the reade...

Biology
Thank you so much! I will check with my teacher tomorrow. That's what i though it would be but wasn't sure. Thanks again!

math
radius of 4 centimeters and length of 12 centimeters, how many cubic centimeters?

math
a bag contains 12 black checkers and 12 red checkers. What is the probability of choosing two red checkers?

Chemistry
thank you so very much this helped so much!!!!!

Chemistry
What is the pH of a one liter auqueous solution to which has been added 0.2 moles of acetic acid (CH3COOH)?

5th grade
Easily done the mode is 600 b/c the mode is the most #'s in the sequence

physicis
what action on our part is neccesary to make the dryiceblock move faster and faster,that is accelerate continuosly?if you are speeding it up, how must you move?

physicis
suppose the dry ice block is moving to begin with and we exert a steady force,either speeding up or slowing down.how does the block behave? now suppose we make the steady force smaller and smaller.how does the dryice block behave? how will it behave when the force we are exert...

physicis
What is dry ice behavior when acted on by a steady push that keeps up with the block and when it is a given a quick shove.

trig
i have to find a & c, b=2.489*10 to the nineth power and i have one degree 25

thermodynamic
A heat pump is proposed that uses 50 degree F ground water to heat a house to 70 Degree F. The groundwater experiences a temperature drop of 12 degree F. If the house require 75,000 Btu/hr, Calculate the minimum mass flux of the groundwater and minimum HP required for the pump.

thermodynamic
Calculate the work necessary to compress air in an isolated cylinder with initial and final volumes of 6.0 and 1.2 ft^3, respectively. The initial pressure and temperature are 30.0 psia and 50 degree F, respectively.

thermodynamic
An air tank with a volume of 20m^3 is pressurized to 10 MPa. The tank eventually reaches room temperature of 25 degree C. If the air inside is allowed to escape without any heat transfer to the environment unit reaches a pressure of 200 KLPa, find the remaining mass of air in ...

Early ed
The most important consideration when installing playground equipment is? A. Cost B.height C.finishing materials D. Surface materials

Conductivity
I still don't understand. Can someone help, and elaborate more?

Trigonometry
If log base 9 of 2 = 3x+1, find x to the nearest tenth.

algebra
simplified x/2-1/3=1/2

Algebra 2
10x+ (x^2) = 42

Math
Paul's car is 14 feet long. Paul is making a model of his car that is the actual size. Which proportion should be used to find the length, L, of Paul's model?

Thermodynamic
One Kg steam with a quality of 0.2 is heated in a piston / cylinder vessel at a constant pressure of 200 KPa unit the temperature reaches 400 degree C. calculate the work done by the steam.

Thermodynamic
N2 is described by its state properties of temperature @ - 100 Degree C, and pressure @10.0 MPa. Determine if it is reasonable to assume that the given substance behaves as an ideal gas at the specified state. If the substance is determined as a real gas or non-ideal substance...

MATH!! probability
Two cards are drawn without replacement from a deck of 52 cards. Determine P(A and B) where A : the first card is a spade B: the second card is a face card please help!!

thermodynamic
The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on the frictionless piston. The spring as the beginning of this process has a displacement of 0.0m with a spring constant of K=10KN/m. (assume Patm=101...

accounting
What potential problems can arise if a company incorrectly classifies costs? Example, what if an inventoriable cost is classified as a period cost?

thermodynamic
The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on the frictionless piston. The spring as the beginning of this process has a displacement of 0.0m with a spring constant of K=10KN/m. (assume Patm=101...

thermodynamic
Energy is added to a piston-cylinder arrangement. The piston is withdrawn in such a way that the temperature remains constant. The initial pressure and volume are 200 KPa and 2m^3, respectively. If the final pressure is 100 KPa, determine the work done by the ideal gas on the ...

Physics
The mass of the hockey puck is 185 grams. When you said time = distance/average speed stopping, in the equation F = m (46.473)*(23.236/.0439), did you mean this, .0439/23.236.

Physics
A player strikes a hockey puck giving it a velocity of 47.673 m/s. The puck slides across the ice for 0.175 s after which time its velocity is 46.473 m/s. The acceleration of gravity is 9.8 m/s2 . If the puck strikes the goalie’s pads and stops in a distance of 4.39 cm, w...

thermodynamic
N2 is described by its state properties of temperature @ -100 degree C, and Pressure @ 10.0 MPa. Determine if it is reasonable to assume that the given substances behaves as a real or non-ideal substance determine its compressibility factory Z.

thermodynamice
A cylinder contain 3 kg of water and water vapor mixture in equilibrium at a pressure of 500 KN/m^2. If the volume of the cylinder is 1.0 m^3, calculate the following. A)temperature of the mixture B) the volume and mass of the liquid C)The volume and mass of the vapor

Physics
You are driving at the speed of 33.4 m/s (74.7296 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press your brakes 0.484 s later. Assume that the brakes on both cars are fully engaged and t...

Physics
You are driving at the speed of 33.4 m/s (74.7296 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press your brakes 0.484 s later. Assume that the brakes on both cars are fully engaged and t...

english
I need help determining the key differences between the four types of writing (summary, analysis, synthesis and evaluation).

7th grade math
6+x=2x-14 -x = -x 6=x-14 6+14=+14 20=x

Science
what forces would be at work if you were trying to move a 20,000kg block of stone? Withoust using a cart or truck, how could you move the stone?

English 1
Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. Whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the children’s homework, rea...

geometry
If the smaller leg of a 30-60-90 triangle is 4 m, what are the lengths of the longer leg and the hypotenuse?

English 1
Revise the mixed sentences so that the beginning of each sentence fits logically with its end. If sentence is correct cirle it. 4. While following an object with her eyes is when eye coordination develops When following an object with her eyes is when eye coordination develop...

English 1
Revise the mixed sentences so that the beginning of each sentence fits logically with its end. If sentence is correct cirle it. 1. By showing babies plain, black-and-white images will help them learn to recognize shapes and focus their vision. Showing babies plain, black-and0...

English 1
Revise the mixed sentences so that the beginning of each sentence fits logically with its end. If sentence is correct cirle it. 1. By showing babies plain, black-and-white images will help them learn to recognize shapes and focus their vision. 2. Babies can see their parents&#...

English (Shifting and mixed sentences)
1. By showing babies plain, black-and-white images will help them learn to recognize shapes and focus their vision. 2. Babies can see their parents’ faces but will not respond with a smile until they are a few weeks old. 3. Babies may gaze intently into a small, unbreakab...

English 1
Through changing his facial expression indicates he may find a particular sound soothing or comforting.

5th grade
divide 6358 by 100

PLEASE READ before you ask a question
ace your college classes dot com for homework help

pre calculus
Write the trigonometric expression in terms of sine and cosine, and then simplify. cot(x)/csc(x)-sin(x)

geometry
if triangle FGH~ to Triangle PQR, FG = 6, PQ = 10 and the perimeter of trinagle PQR is 35 find the perimeter of triangle FGH

us history`
township

English
Thanks that makes since to be now. Let me try a few more that can be either just to make sure I understand. 1.All of the actors (knows, know) their lines. 2. Most of the plants (needs, need) water. 3.Now more of the waiters (seems, seem) busy. 1.plural=know 2.plural=need 3.plu...

English
Can you please explain how none is singular in sentence #1? I know that all, any, more, most, none, and some may be either singular or plural, depending on their meaning in a sentence.

English
1.plural=has 2.singular=is

English
1. None of the guests (has, have) left. 2. Each of these apples (is, are) ripe. 3.One of my favorite songwriters (is, are) Billy Joel. 4.Some of my cousins (has, have) come to my party. 5.All of the bread (was, were) eaten. Tell if the indefinite pronoun is singular or plural ...

English
1.Everyone in the club (has, have) read this book. 2.Most of the field (needs, need) mowing. Tell if the indefinite pronoun is singular or plural. Then choose correct word in () 1.singular=has 2.singular=needs

5th grade
Ther is no mode

math
60 boys 80 girls

algebra
The natural stride up a certain staircase has a slope of 3/5, meaning that a run of 5 inches has a rise of 3 inches. The model for a standard staircase is y=(3/5)x Find the rise for a staircase constructed at a mansion which has a run of 12 inches. Not sure how to set equation up

Chemistry
A 0.5962g sample of iron ore is dissolved in acid producing Fe3+. Through a series of reactions, the iron precipitates as the Fe(OH)3. The precipitate is heated, forming solid Fe2O3. What is the mass % of iron in the sample if the analysis produced 0.3210g Fe2O3?

11th grade
From what i see your trying to convert 4000 grams of fe203 to moles, and then multiply the find the amount of fe203 in 3 moles of co2. So your answer would be 4000*3/ 159.68 = 75.2 mole of co2 .

English
1.He lived with his parents, brothers, and sisters. 2.Those in this small Mexican American community were worried and frightened. 3.That was the time when Cesar Chavez first lived among the migrant workers. 4.Chavez became a spokesperson for poor farmworkers. 5.In 1962, he est...

5th grade math
The number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????

English
1.Throughout his life, Chavez focused on nonviolent action. 2.He organized several boycotts of grapes and lettuce. 3.In California there was work for farmworkers if they could go from one farm to another. 4.In 1937, Cesar Chavez's family did not have enough money for the t...

math
the number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????

math
the number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????

Physics
A ball thrown horizontally at 18.3 m/s from the roof of a building lands 36.3 m from the base of the building. How tall is the building?

Algebra
Question: Looking below is this answer correct? If you follow the math, you reach the entire population before 8 hours have passed yet the solution says 8.86 hours.... Is the solution giving us the numbers in the set and not the actual elapsed hours??? Does anyone know why? th...

algebra
what is slope and y intercept for y=22.048x-19.464

7th grade math
SA=2pi(4 squared) + 2pi (4)(20)

7th grade math
30 = 12d

ALGEBRA
Thank you, i was checking my answer.

ALGEBRA
Express as a single logarithm and simplify: log x – log (8x) + 2 log 4

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