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November 23, 2014

November 23, 2014

Total # Posts: 3,046

**Precalculus**

cos2x=cos(x+x)=
*January 10, 2011*

**Chemistry**

which substance takes the shape of and fills the volume of any container into which it is placed ? (1)H2O (l) (2)CO2(g) (3)I2(s) (4)Hg(l)
*January 9, 2011*

**Science**

thanks :)
*January 9, 2011*

**Science**

What occurs when a substance melts? 1) It changes from solid to liquid, and heat is absorbed. 2) It changes from solid to liquid, and heat is released. 3) It changes from liquid to solid, and heat is absorbed. 4) It changes from liquid to solid, and heat is released.
*January 9, 2011*

**math**

To which sets of numbers does the square root of 31 belog too
*January 9, 2011*

**psychology**

briefly describe the developmental needs (physical,cognitive,social,emotional,cultural) at each stage of development over the lifespan
*January 8, 2011*

**renting an apartment better option than buying a h**

outline
*January 8, 2011*

**Intro to Business**

The U.S. Supreme Court ruled that cities could have school voucher programs that give money directly to parents, who could then choose between competing schools, public or private. The idea was to create competition among schools. Like businesses, schools were expected to ...
*January 6, 2011*

**english**

too funny. to comes before a verb or noun, and too comes before adjectives
*January 6, 2011*

**chemistry**

Determine how many liters of nitrogen will be required to produce 87.0 liters of ammonia. The balanced equation for this reaction is: 3H2(g) + N2(g) ==> 2NH3(g).
*January 5, 2011*

**Algebra**

standard form is y=mx+b so you would have to distribute 4 into x+5 then add 2 to both sides to get the equation equal to y.
*January 5, 2011*

**ipc**

Since Kinetic energy is defined as (1/2)mv^2 thus if v was doubled the kinetic energy would quadruple (2^2).
*January 4, 2011*

**Statistics**

Suppose a study found a correlation coefficient r = -0.61 between the gender of a worker and their income. What can you conclude?
*January 4, 2011*

**microeconomics**

how do i figure out how to answer the question of what is the opportunity cost of producing 200 pounds of potatoes?
*January 3, 2011*

**derivatives**

If the derivative of f is given by f'(x)=ex-3x2, at which of the following values of x does f have a relative maximum value?
*January 1, 2011*

**chemistry**

рассчитайте константу равновесия реакции РС...
*December 21, 2010*

**chemistry**

What mass of water, in grams, would have to be decomposed to produce 28.7 L of molecular oxygen at STP?
*December 20, 2010*

**Phsyics**

the end velocity is 4m/s
*December 17, 2010*

**Phsyics**

A 44.0kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75m higher than the surface of the water and the ramp is inclined at an angle of 35.0 degrees above the horizontal. What is the coefficient of kinetic friction between...
*December 17, 2010*

**phsyics**

A young girl sits at the edge of a dock by the bay, dipping her feet in the water. At the instant shown in the figure , she holds her lower leg stationary with her quadriceps muscle at an angle of 39 degree with respect to the horizontal. Use the information given in the ...
*December 16, 2010*

**phsyics**

A 8.0×10−2-{\rm kg} toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.30 m/s in a horizontal circle of radius 0.41 m, Find the angle the string makes with the vertical.
*December 16, 2010*

**Physics**

A 44.0 kgseal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75 m higher than the surface of the water and the ramp is inclined at an angle of 35. degrees above the horizontal. If the seal reaches the water with a speed of 4.00...
*December 16, 2010*

**Math**

A nanometer is a unit equal to 0.000000001 meter. Write a expression to represents this number is scientific notation
*December 16, 2010*

**Math**

A pizza parlor has 2 1/2 pizzas left. Each pizza originally has 8 slices. How many slices are left?
*December 16, 2010*

**calculus**

x^2+3xy+2y^2=7
*December 16, 2010*

**Math**

The glass in a frame has an area of 91 m sqaurd. If the window length is 14 m, what is the window height?
*December 16, 2010*

**math**

how do you get back from 81/1 to 16/1
*December 16, 2010*

**math**

rudy went to the mall to spend some of his money he earned. he spent 1/3 of his money o n a new shirt. He then went to to the music store and bought a cd with 1/3 he had left. At dvds to go he bought a dvd with 1/3 of the money he had left. He stopped once more and bought a ...
*December 16, 2010*

**chemistry HELP!**

The book says to use ICE
*December 15, 2010*

**chemistry HELP!**

Solve an equilibrium problem (using an ICE table) to calculate the pH of each solution: a solution that is 0.170 M in HC2H3O2 and 0.105 M in KC2H3O2
*December 15, 2010*

**chemistry **

Predict qualitatively whether the salts below dissolve to give solutions that are acidic, basic or neutral. what is the rule for figuring this out? a. KNO2 - basic b. Ng(NO3)2 - neutral c. NH4ClO2 - acidic d. NaHCO3 - basic
*December 15, 2010*

**Chemistry**

Calculate the pH of a solution at the endpoint of a titration involving 25.00 mL of CH3COOH at unknown concentration, and 21.40 mL of 0.100 M NaOH
*December 15, 2010*

**Chemistry! **

1. not sure where to find Kb as listed as 1.8E^-5? so is it 1.8E^-5= (NH4+)(NH3)/0.1-X (9.25)(4.75)/0.1-X = 439.375-X and how to I convert this to pOH and then to pH?
*December 15, 2010*

**Chemistry!! **

So is Ka water H2o? not sure where you got 7.20 in my chart 7.2 goes with H2PO4^- there is nothing for (H3O+) but I got 4.69 for CN- and 9.31 for HCN I am so lost...
*December 15, 2010*

**Chemistry**

Can the 5% approximation be used to determine the pH of the following solutions? How do I do this question? (A) 0.56 M hypochlorous acid - yes (B) 3.00 M nitrous acid - yes (C) 0.010 formic acid - no
*December 15, 2010*

**CHEMISTRY TITRATION Q**

because at end point the solution is neutral, so the # of moles are the same? No ...so what do I do differently??
*December 15, 2010*

**CHEMISTRY TITRATION Q**

The titration of 25.00mL of Ba(OH)2 solution with an aqueous solution of 0.500 M HCl reaches an end point when 30.20 mL of the HCl solution is added. Determine the concentration of M of the Ba(OH)2 solution. Soo 25.00mL=0.025L 30.20mL= 0.0302L moles= MxL (0.500M)(0.0302L)=0....
*December 15, 2010*

**math**

find the value of both percentages out of 100 and then add them together along with the $6.80
*December 15, 2010*

**college maths**

i was thinking abot 154.7 bt was not so sre and i did know it had to be less bt i didnt want to assme i wanted to know how i came up with the answer
*December 15, 2010*

**college maths**

One and one-half cups of native blueberries have 232 calories. How many calories does one cup of native blueberries have? (Points: 5) 233.5 calories per cup 232 calories per cup 154.7 calories per cup 0.006 Calories per cup Not sre how to calclate this one can i get some help ...
*December 15, 2010*

**Science**

I'm confused..What is the significance of a 1-1 line in regards to density?
*December 14, 2010*

**college maths**

81/800
*December 14, 2010*

**college maths**

some help wold really be appreciated please?
*December 14, 2010*

**college maths**

Write as a reduced fraction. 10 1/8% not sre how to work this one please help. 4/5 81/100 1/10 81/800
*December 14, 2010*

**english/grammer/manners**

Do you think us students should have to use yes or yes ma'am when answering teachers/ What do ya'pp prefer? And if so is there a comma between the words yes and ma'am/
*December 14, 2010*

**math**

which set is infinite? P = {positive numbers less than 60} Q = {whole numbers between 10 and 20} R = {intergers ge=reater than 18} S = {even numbers between 5 and 15}
*December 13, 2010*

**college maths**

subtract. 10 3/5-2 10/11= 8 38/55 7 743/55 7 38/55 Is D correct??
*December 13, 2010*

**college maths**

Simplify 5+1/3 1/3 1/3 {1/9+1/9} 4 1787/2187 4 1792/2187 4 1784/2187 4 22/27 Is D the best choice not sre for this one
*December 13, 2010*

**college maths**

wooooohooooooooo!!!!! thanks so mch
*December 13, 2010*

**college maths**

Translate and solve. A number n increased by 1/4 gives 1/9. Find n. (Points: 5) n=1/9 n= -5/36 n=1/36 n=1/18 is it B
*December 13, 2010*

**college maths**

thanks very much i now have a better understanding
*December 13, 2010*

**college maths**

Find the LCD and add the fractions. 1/125 + 4/50= 11/24 1/1250 1/35 551/6250 (Points: 5) im not getting the concept of this some help is really needed please
*December 13, 2010*

**chemistry**

10.2 g of Pb(NO3)2 are dissolved in 100 mL of water, and added to 250.0 mL of a 0.250 M solution of KI. Determine the mass in grams of Pbl2 produced, and find the number of moles of the excess reagent. PLZ explain
*December 13, 2010*

**chemistry**

Determine the molarity of nitrate ions in a solution prepared by mixing 25.0 mL of 0.50 M Fe(NO3)3 and 35.0 mL of 1.00 M Mg(NO3)2 Please explain fully do not know where to start?
*December 13, 2010*

**college maths**

??? any help
*December 13, 2010*

**college maths**

Ann and Grace mow the yard for $38 each mowing. During one summer they mowed 2 times and spent a total of $10 on gas. The girls split their earnings. How much did each girl receive? (Points: 5) $33 $38 $66 $76 this one is confusing its either C or D bt depends....Are they ...
*December 13, 2010*

**college maths**

no help??
*December 13, 2010*

**college maths**

its not allowing me to pt the square roots in......its someting like this 10X3X5 square root respectively 0, 3, 2
*December 13, 2010*

**college maths**

Write as a product of factors; then find the product. (Points: 5) 0 90 675 150 I think the answer is C but im confuse any other opinions please?
*December 13, 2010*

**math**

i dont know
*December 8, 2010*

**math**

A diameter of a circle is perpendicular to a chord whose length is 12 inches. If the length of the shorter segment of the diameter is 4 inches, what is the length of the longer segment of the diameter?
*December 8, 2010*

**math 104**

if a bussiness borrows $20,000 and repays $29,5000 in 5 years ,what is the simple interest rate?
*December 6, 2010*

**Math**

Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__
*December 5, 2010*

**Math**

Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__
*December 5, 2010*

**Math**

So false?
*December 5, 2010*

**Math**

A rectangular flowerpot is 20 inches long 8 inches wide and 6 inches high. true or false if andy fills the flowerpot 2/3 fullof potting soil the expression 2/3(20 + 8 + 6) could be used to find the amount of potting soil he needed
*December 5, 2010*

**Exponents**

GRE question - What is greater z or 60? z is the degrees of a one of the congruent sidesAn isoceles triangle
*December 5, 2010*

**Business Communications**

The interviewer wants to know why you got a "D" in all your English classes until this year, when you got a "B." Your best response is: (Points: 5) “I had problems writing and never thought it was important. Then, I realized that it is important, so I ...
*December 4, 2010*

**Business Communications**

Choose the best revision of this sentence: "I want an interview with you." (Points: 5) I anxiously await a phone call from you so that we can meet to discuss job opportunities. I can't wait to hear from you. Any time at all that you want to call and have me for ...
*December 4, 2010*

**Business Communications**

thank you sooo much
*December 4, 2010*

**Business Communications**

Which of the following is the BEST advice for increasing the number of "hits" on a scannable résumé? (Points: 5) Avoid jargon of any sort. Use a Keywords section under your name, address, and phone. Use more verbs than nouns. Use only one page. I think ...
*December 4, 2010*

**geology**

if the air temperature @ sea level were 23 C what would the air temperature be at a height of 2 km under avg conditions?
*December 4, 2010*

**Business Communications**

thank you very much really appreciate it this forum is a big help to me
*December 3, 2010*

**Business Communications**

Unsuccessful groups are more likely than successful groups to: (Points: 5) pay close attention to how something is said. rationalize criticism. deal directly with conflicts that emerge. make important decisions together. im not understanding this question...bt i suppose B is ...
*December 3, 2010*

**Business Communications**

In response to a compliment on his excellent oral presentation, a Japanese business executive replies, "No, it wasn't very good." Which of the following is the MOST likely explanation for this response? (Points: 5) He thought the person giving the compliment was ...
*December 3, 2010*

**Math209**

I am not understanding how to factor polynomials. Example: Factor 12y^6-40y^5+28y^4
*December 3, 2010*

**Chemistry**

2. Which bond is polar covalent? a) H2 b) Cl2 c) HCl d) O2
*December 2, 2010*

**MATH**

HOW MANY DIFFERENT WAYS COULD THE FOOTBALL TEAM SCORE 11 POINTS
*December 2, 2010*

**Macro economics**

if your agency hire a consultant to develop new software programs to lease at a constant cost of $ 1000 per year. the consultant say you can save $ 200 per year for every computer you purchase but you will be charged $ 100 for each harddrive you purchase . how many programs ...
*December 2, 2010*

**physics**

For B, the magnitude is simply the absolute value of what you got in part A.
*November 30, 2010*

**chemistry**

In propanol, cholesterol is 2.7 times more soluble at 43°C than at 20°C. If a saturated propanol solution is prepared at 43°C , what proportion of the cholesterol will crystallize upon cooling to 20°C?
*November 30, 2010*

**math**

how do i solve 8 times 493 using distributive property. then draw an array showing work
*November 30, 2010*

**8th grade**

Tom had scores of 78, 88, 94 and 79 on his first four science tests. What must he score on the next test to have an average of 88?
*November 29, 2010*

**economic**

Does diminishing marginal utility or indifference curve works for consumers? which of these concept works
*November 29, 2010*

**Chemistry**

write the formula for the following chemical compounds 1.Sodium sulfide 2.sulfur hexaflouride 3.Ammonium sulfate
*November 28, 2010*

**College Algebra**

Compounded semiannually. P dollars is invested at annual interest rate r for 1 year. If the interest is compounded semiannually, then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year. Rewrite this expression without parentheses. Evaluate the ...
*November 26, 2010*

**Statistics**

The X2 goodness of fit can be used for both qualitative and quantitative data Is this true or false?
*November 22, 2010*

**vocabulary skills**

The correct answer is number 4. 100% sure that is correct answer.
*November 22, 2010*

**physics**

a football is kicked 40 meters. if the ball is in the air for four seconds what is the intial speed it was kicked
*November 22, 2010*

**physics**

a 1 kg dart moving horizntally at 10 m/s sticks to a wood block of mass 9 kg which slides across a friction free level surface. what is the speed of the block and dart after collision?
*November 22, 2010*

**probability**

1. A large video rental chain recently decided to change its rental policy, allowing an unlimited return date instead of requiring that movies be returned the next day. The marketing team reasoned that this would greatly increase the popularity of their stores, and also that ...
*November 22, 2010*

**physics**

At what temperature do the molecules of nitrogen gas have an rms speed of 34 m/s? 34 m/s is a typical highway speed for a car.
*November 22, 2010*

**math**

Robert Mason's account of $98.50 has been delinquent for three months. According to the office procedures manual, after 90 days a 2% service charge, compounded monthly, is added to future bills. What will be the amount owed after nine months?
*November 22, 2010*

**Medical Assisting**

Steri-strips cost $4.95 per box, there are 100 per box. If an orthopedic surgical group uses 200 Steri-strips a month, how much would be saved in a year by making a single purchase for a year's supply rather that 12 monthly purchases.If large lots of 1,000 or more, the ...
*November 22, 2010*

**Business Communications**

Im not sre of the answer
*November 22, 2010*

**Business Communications**

Which of the following would be an example of an emotional appeal that is part of a persuasive message? (Points: 5) "All of the ingredients we use are home-grown in the United States." "We can save 20% in labor costs if we relocate our plant to the Midwest."...
*November 22, 2010*

**Business Communications**

Which of the following is NOT a question you need to answer to choose a persuasive strategy? (Points: 5) What do you want readers to do? What points will the audience agree with? How strong a case can you make? What kind of persuasion does your organization value? IM CONFSE I ...
*November 22, 2010*

**Business Communications**

What is the BEST reason to omit the reason for the refusal in a negative message? (Points: 5) The reader may not think of the reason. The reason reflects poorly on the company. The reason benefits the reader, but not the writer. The reason is watertight. im not so sre of the ...
*November 22, 2010*

**chemistry**

i think I am not doing this part right (1/n5^2 - 1/n1^2)
*November 21, 2010*

**math**

donna runs 7 miles in 75 minutes. At the same rat, how many miles would she run in 45 minutes?
*November 21, 2010*

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