Friday

October 31, 2014

October 31, 2014

Total # Posts: 480

**Chemistry**

Suppose that 2.00 mol of HNO2 is dissolved in 1.00L of water at 25 degrees C. Because HNO2 is a weak acid, it is in equilibrium with the ions, H+ and NO2-. What are the concentrations of these ions at equilibrium?
*December 28, 2009*

**Chemistry**

A l.00L flask contains 4.40mol of HI at a certain temperature. The Keq at this temperature is 5.0 * 10^-4. What are the concentrations of H2 and I2 at equilibrium?
*December 28, 2009*

**Chemistry**

Which value of Keq indicates most favorability of product formation, Keq = 1 * 10^12, Keq= 1.5 or Keq= 5.6 * 10^-4?
*December 28, 2009*

**physics**

A broom handle has a length of 1.67m and a mass of 580g with the axis rotation through the center. (what is this problem asking me to do?)
*December 16, 2009*

**AP Chemistry**

I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a ...
*December 8, 2009*

**Ap Chemistry**

I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a ...
*December 8, 2009*

**Physics**

A bolt is to be tightened with a torque of 8.0 N*m. If you have a wrench that is 0.35 m long, what is the least amount of force you must exert? the equation for this problem is t=Fr sinbeta, but the sin is not given What am I suppose to do?
*December 6, 2009*

**Math**

So after i do all that should i get one whole number
*November 29, 2009*

**Math**

What is the probability that a number chosen at random from the range 1,000,000,000 to 9,999,999,999 inclusive will contain ten different digits? Round your answer to the nearest millionth
*November 29, 2009*

**Calculus**

A rectangular box with a square base and top is to be made to contain 1250 cubic feet. The material for the base costs 35 cents per square foot, for the top 15 cents per square foot, and for the sides 20 cents per square foot. Find the dimensions that will minimize the cost of...
*November 29, 2009*

**math**

A rectangular box with a square base and top is to be made to contain 1250 cubic feet. The material for the base costs 35 cents per square foot, for the top 15 cents per square foot, and for the sides 20 cents per square foot. Find the dimensions that will minimize the cost of...
*November 29, 2009*

**physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.17 and the push imparts an initial speed of 4.1 m/s?
*November 19, 2009*

**possessive nouns**

A ____ kindness kept them alive another day. Is it A. strangers B. stranger's C. strangers' D. strangers's Is it b. stranger's
*November 2, 2009*

**possessive nouns**

____ Jews fled from the German soldiers. Is it A. Polands B. Poland's C. polands' D. Polands's Is it b. Poland's
*November 2, 2009*

**possessive nouns**

______ stories seemed unbelievable. Is it A. Survivors B. Survivor's C. Survivors' D. survivors's Is it b. Survivor's
*November 2, 2009*

**possessive nouns**

Many ____ stomachs were often empty. A. refugees B. refugee's C. refugees' D. refugees's Is it c. refugees'
*November 2, 2009*

**possessive nouns**

Soldiers carried several ___ cold rations. Is it A. days B day's C.days' D. days's My answer is c. days'
*November 2, 2009*

**possessive nouns**

Success often depended on the ____ food suply. Is it A. armies B. armie's C. armys' D. army's I say it is d. army's
*November 2, 2009*

**possessive nouns**

Is it b. soldier's
*November 2, 2009*

**possessive nouns**

A _____ shoes wore out quickly. Is it A. soldiers B. soldier's C. soliers' D. soldiers's
*November 2, 2009*

**possessive nouns**

I chose c because I thought I should make it plural. is the correct one is b. poland's
*November 2, 2009*

**possessive nouns**

Is it c. Polands'
*November 2, 2009*

**possessive nouns**

I think it is D. Polands's
*November 2, 2009*

**possessive nouns**

_____ Jews fled from the German solders. Is it A. Polands B. Poland's C. Polands' D. Polands's
*November 2, 2009*

**possessive nouns**

American ______ efforts helped win the war. Is it A. soldiers B. soldier's C. soldiers' D. soldiers's
*November 2, 2009*

**Chemistry**

What type of chemical reation is : Na + H2O---) NaOH + H2? The 2s are subscripts but I couldn't get it to type that way.
*October 28, 2009*

**Social Studies**

is there freedom in massachusetts
*October 17, 2009*

**Ap Chemistry**

Hydrogen gives off 120. J/g of energy when burned in oxgyen, and methane gives off 50. J/g under the same circumstances. If the mixture of 5.0 g of hydrogen and 10. g of methane is burned, and the heat released is transferred to 50.0 g of water at 25.0 degress Celsius, what ...
*October 17, 2009*

**physics**

Is it possible for a car to move in a circular path in such a way that it has a tangential acceleration but no centripetal acceleration?
*October 9, 2009*

**algebra (excel)**

I am trying to create a forumla that will subtract two columns and in the third column tell me if the one column is greater than the other column by 10%. So far I have IF(AND(A:A-B:B>(10%)*(A:A)=TRUE),C2,"FALSE") which is giving me false for everything but I know ...
*September 16, 2009*

**math**

What is the greatest common factor of 102 and 214?
*August 16, 2009*

**Social Studies**

what are some of the challenges caused by immigration?
*May 20, 2009*

**American History**

1.True 2.A 3.B 4.D 5.A 6.True 7.c. 8.False 9.True 10False 11.A 12.True 13.True 14.D 15.A 16.C 17.False 18.C 19.True 20.true 21.C. 22.A. 23.B 23.B.
*May 14, 2009*

**American History**

1.True 2.A 3.B 4.D 5.A 6.True 7.c. 8.False 9.True 10False 11.A 12.True 13.True 14.D 15.A 16.C 17.False 18.C 19.True 20.true 21.C. 22.A. 23.B 23
*May 14, 2009*

**Science**

Why do non-polar substances tend to boil at relatively low temperatures?
*May 14, 2009*

**english**

how do you describe an authors writing style and structure?
*May 10, 2009*

**math**

18 inches is the answer to the first question because you must be 48 but you are only 30 now, you must grow 18 (48-30) 1,010 is the answer to the second question, 840+1,150=1990 but you can only eat 3,000-1,990 now which is 1,010 :)
*March 14, 2009*

**psychology**

1. The experimental rats were being raised in separate environments. One group lived in the traditional cage in a quiet, but well lighted room. They were supplied with plenty of food and water. The second group inhabited "Rat Disney Land." There were colorful ...
*March 13, 2009*

**college precal**

find all the values: sin2x- sqrt3cosx=0
*December 12, 2008*

**sci/275**

Review Ch. 5, The Flow of Energy Through Ecosystems. Then, complete Appendix C. Â· Post your response to the following: Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How ...
*December 9, 2008*

**Algebra check**

Where appropriate, include the approximation to the nearest ten-thousandth. 27.) log x = -3 I have the answer as 1 28.) 7 ^(4-9x)= 49 I have the answer as 2/9 29.) 8^x =5.2 not sure 30.) 1n x=5/8 not sure Are these answers right?
*December 1, 2008*

**Algebra help**

Thanks
*December 1, 2008*

**Algebra help**

State the domain and the range of each function. 22.) f(x)=e^x +3 the +3 is separated 23.) g(x)= 1n(x-1)
*December 1, 2008*

**Math help**

Okay x^2-4 = 4 x^2= 8 sqrt(x^2)= sqrt 8 x= 2.83 is this right?
*December 1, 2008*

**Math help**

Where appropriate, include the approximation to the nearest ten-thousandth. 31.) log(x-4)+ log(x+4)= log4 I have the answer as 4 Is this answer right?
*December 1, 2008*

**Algebra help 2**

27.) x=1 28.) I have x= 2/9 Not sure about the last two 29.) 8^x =5.2 not sure 30.) 1n x=5/8 not sure
*December 1, 2008*

**Algebra help 2**

Where appropriate, include the approximation to the nearest ten-thousandth. 27.) log x = -3 I have the answer as -3 28.) 7 ^(4-9x)= 49 I have the answer as 2 29.) 8^x =5.2 not sure 30.) 1n x=5/8 not sure Are these answers right?
*December 1, 2008*

**Algebra Thanks**

Thanks
*December 1, 2008*

**Algebra help bobpursley**

Where appropriate, include the approximation to the nearest ten-thousandth. 24.) 3^x= 1/81 I have x = 1/5 25.) logx 125 =3 I have x = 5 26.) log64 x = 1/2 I have x = 8 Are these answers right?
*December 1, 2008*

**Algebra**

Where appropriate, include the approximation to the nearest ten-thousandth. 24.) 3^x= 1/81 I have x = 1/5 25.) logx 125 =3 I have x = 5 26.) log64 x = 1/2 I have x = 8 Are these answers right?
*December 1, 2008*

**Algebra**

Where appropriate, include the approximation to the nearest ten-thousandth. 24.) 3^x= 1/81 25.) logx 125 =3 26.) log64 x = 1/2
*December 1, 2008*

**Algebra help**

State the domain and the range of each function. 22.) f(x)=e^x +3 23.) g(x)= In(x-1)
*December 1, 2008*

**Algebra**

actually the +3 is separte so it is f(x)= e^x +3 and the second problem is g(x)= In(x-1)
*December 1, 2008*

**Algebra**

State the domain and the range of each function. 22.) f(x)=e^x +3 23.) g(x)=1n(x-1)
*December 1, 2008*

**Algebra help**

Okay I got it log (8/3) = log 8 - log 3 = 2.079 - 1.099 = 0.98 log 24 = log (3x8) = log 3 + log 8 = 3.688 log 25 = log 5^2 = 2 log 5 = 2.138
*December 1, 2008*

**Algebra help**

If loga 8=2.079, loga 5=1.609, and loga 3=1.099, find the following? 19.) loga 8/3 is this 1.89? 20.) loga 24 Not sure 21.) loga 25 not sure how to do this
*December 1, 2008*

**Algebra help**

Thanks
*December 1, 2008*

**Algebra help**

Simplify: Note: The first letters next to log are the small letters. 16.) logr r 17.) logt t^4 18.) logb 1
*December 1, 2008*

**Algebra help**

Okay thanks
*December 1, 2008*

**Algebra help**

Express in terms of logarithms of a, b, and c: log(a^3b^2)/c How would I convert this?
*December 1, 2008*

**Algebra help**

Thanks
*December 1, 2008*

**Algebra help**

Find the formula for the inverse of each function. 4.) g(x)= (x+5)^3 I do not understand how to do this one.
*December 1, 2008*

**Algebra check**

Thanks
*December 1, 2008*

**Algebra check**

Convert to exponential equations. 12.) m=log3 9 I have the answer as 3^m =9 13.) log2 64=6 I have the answer as 2^6 =64 Are these answers right?
*December 1, 2008*

**Algebra check Reiny**

So then are these answers right? 10.) 4^-3 =1/64 I have the answer as log4 1/64 =-3 11.) 144^1/2 =12 I have the answer as log 144^12 =1/2
*November 30, 2008*

**Algebra check DrBob222**

I have a question the formula that I used was b^y=x means that logbx=y is this the correct formula? so using that formula I got the following. 4^-3 =1/64 I have the answer as log4 1/64 =-3 144^1/2 =12 I have the answer as log 144^12 =1/2
*November 30, 2008*

**Algebra check**

Thanks.
*November 30, 2008*

**Algebra check**

Convert to Logarithmic equations. 10. 4^-3 =1/64 I have the answer as log4 1/64 =-3 11. 144^1/2 =12 I have the answer as log 144^12 =1/2 Are these answers right?
*November 30, 2008*

**Algebra inverse question**

Hi Reiny, I just have one question for 4.) the problem is g(x)= (x+5)^3 how were you able to convert the equation to the following? let y = (x+5)^2 interchange x with y x = (y+5)^2
*November 30, 2008*

**Algebra inverse**

Find the formula for the inverse of each funtion. 3.) f(x)= 2x-5 for this one I have y= (x+5)/2 is this correct? 4.) g(x)= (x+5)^3 I am stuck on this one.
*November 30, 2008*

**Thanks**

Thanks
*November 30, 2008*

**Algebra check Damon**

Not a function but is it one to one?
*November 30, 2008*

**Algebra check**

Determine whether f(x)=x^2 is one to one. I have the answer as yes. Is this right
*November 30, 2008*

**Algebra check**

Determine whether f(x)=x^2 is one to one. When I substitute values in for x even when I use negative values x^2 will be positive so is it one to one?
*November 30, 2008*

**Algebra help drwls**

for f of g(x) I have -4x^2-10x-6 Is this right?
*November 30, 2008*

**Algebra help**

Find (fog)(x)and (gof)(x)if f(x)=x-x^2 and g(x)= 2x+3. Okay so I did the following: For f(of)g(x), take (2x+3) - (2x+3)^2 (insert g(x) where the "x" is in f(x) ) For g(of)f(x), take 2[x-x^2] +3 The first answer that I get for (2x+3) - (2x+3)^2 is -4x^2-12x-9 The ...
*November 30, 2008*

**Algebra help**

Find (fog)(x)and (gof)(x)if f(x)=x-x^2 and g(x)= 2x+3.
*November 28, 2008*

**Algebra word problem help**

Thank you. I was able to get the same answers.
*November 21, 2008*

**Algebra word problem help**

The average walking speed R of people living in a city of population P,in thousands, is given by R=0.37InP+0.05, where R is in feet per second. a.) The population of Honolulu, Hawaii is 395,790. Find the average walking speed. b.) A city's average walking speed is 2.70 ft/...
*November 21, 2008*

**6th geography kinda in a hurry**

whoops i meant NYG to arizona not TN
*November 20, 2008*

**6th geography kinda in a hurry**

Number the rivers in the sequence the NY giants will cross them en route to the valley of the sun(Tennessee) Arkansas Delaware Hudson Illinois mississippi Missouri Ohio Rio Grande
*November 20, 2008*

**6th geography**

Yeah i have 2 more that i cant find: can you answer (or atleast help with) these questions- Number the rivers in the sequence the NY giants will cross them en route to the valley of the sun(Tennessee) And (the other question is much more important)what 5 states cover the area ...
*November 20, 2008*

** 6th geography**

your a life saver
*November 20, 2008*

** 6th geography**

what is the shallow part of the sea off the coast of Boston called?
*November 20, 2008*

**Math Algebra check Thanks**

Thanks
*November 10, 2008*

**Math Algebra check please**

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w is this right?
*November 10, 2008*

**Math help**

Did I find this out correctly?
*November 10, 2008*

**Math help**

Solve: x-(3/x)<0 is the answer(-infinity, -sqrt3)U(0,sqrt3) ?
*November 10, 2008*

**MAth answer check**

One solution of kx^2 +6x-k=0 is -3. Find the other solution I have the answer as -1/3 is this right?
*November 10, 2008*

**Algebra problem**

Which of the following points is an x-intercept of the graph of f(x)=(x^2+2x)^2 -11(x^2+2x)+24? a.)(4,0) b.)(-6,0) c.)(6,0) d.)(-4,0)
*November 10, 2008*

**Math check please**

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
*November 10, 2008*

**Math Help please answer**

I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
*November 9, 2008*

**Math Help please**

Solve w= (va)/(r^2+a^2) for a. is the answer a= sqrt[w(r^2+v^2)/v]?
*November 9, 2008*

**Math Algebra help**

Solve w= (va)/(r^2+a^2) for a. is the answer a= sqrt[w(r^2+v^2)/v]?
*November 9, 2008*

**Math Algebra check**

Which of the following quadratic equations has -4 and 3/4 as the solutions? a.)x^2+(13/4x)-3 b.)x^2+(30/7x)-(25/7) c.)x^2+(30/7x)+(25/7) d.)x^2-(13/4x)+3 I substituted the values and I have the answer as (a.)
*November 9, 2008*

**Math help**

Which of the following quadratic equations has -4 and 3/4 as the solutions? a.)x^2+(13/4x)-3 b.)x^2+(30/7x)-(25/7) c.)x^2+(30/7x)+(25/7) d.)x^2-(13/4x)+3 I substituted the values and I have the answer as (a.)
*November 9, 2008*

**Math help update Thanks**

Thanks
*November 9, 2008*

**Math help update**

let f(x) = 12x^2 +7x-10. Find x such that f(x)=0 a.) -4/5, 5/3 b.) -5/4, 2/3 c.) -2/5, 5/3 d.) -5/3, 2/3 I think I have it. I was able to factor out 12x^2 +7x-10 to (4x+5) (3x-2)=0 The answer is -5/4 and 2/3 right?
*November 9, 2008*

**Math answer check**

Determine the type of number that the solutions of x^2 +5x+3=0 will be I have the answer as rational is that right?
*November 9, 2008*

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