Wednesday
December 7, 2016

# Posts by deedee

Total # Posts: 125

Analytical Chemistry
I'm really sorry, but I still don't understand how all the amounts relate to each other, and I am about at my wits end. I'm not very good at math, but I am normally pretty good at chemistry and problem solving, and I don't know why I still don't get this. ...
June 5, 2016

Analytical Chemistry
Could someone show me step by step how to solve this type of problem? I have to do several of them, and would love to understand what is actually happening! Thank you so much in advance, I appreciate your help and time! Calculate the weight percent of ascorbic acid in a tablet...
June 5, 2016

Science
You're in Connections Academy. I am taking the same quiz
October 24, 2015

Calculus I
Hello! I am not sure why I am getting this problem wrong, and I keep getting six. Could someone be kind enough to show me how it's done? Thank you very much in advance! Find the limit. Use l'Hospital's Rule if appropriate. lim ((5x − 2)/(5x + 4))^(5x + 1) x&#...
June 30, 2014

Calculus I
That was so helpful!! I appreciate you writing all that out, thank you very much!
June 26, 2014

Calculus I
Hello! I am taking Calculus I and am in Sec. 4.3 of Stewart's 7th Edition. I ran across a problem that I don't understand the mechanics of, could someone show me? Thanks a bunch! For what values of the numbers a and b does the function f(x)= axe^{b(x^2)} have the ...
June 26, 2014

Calc I
I'm a little confused about this one, it seems different from the rest of our homework! Could someone give me some hints? Thank you! Find the first and second derivative of the function. Check to see that your answers are reasonable by comparing the graphs of f, f ', ...
January 25, 2014

Calculus
I've been having a hard time with these lately... could someone explain it to me? Find f '(a). f(x) = (3x^2 − 3x + 4)
January 20, 2014

Calculus, Limits
Thank you! That was a huge help!
January 20, 2014

Calculus, Limits
Find the limit. lim t → ∞ (sqrt t + t^2)/(6t − t^2)
January 20, 2014

Trigonometry
Oh, I see now! That's exactly what happened!! Thank you, that's perfect!!
January 10, 2014

Trigonometry
If Hello, I have been working on this one problem for a while now and my professor is on vacation. Could someone give me a point in the right direction? Question: If sin x = 2/3 and sec y = 5/3, where x and y lie between 0 and π/2, evaluate sin(x + y). My answer was: (3+...
January 10, 2014

Trigonometry
A triangle has two angles, one 90 degrees, the other (between adjacent and hypotamuse) 26 degrees, and a hypotamuse of 10ft. Find the opposite side's length. Hint: use sine. I think I'm supposed to do 10(sine26), but the answer isn't right. What am I missing? Thanks!
September 6, 2013

CHEMISTRY
According to the equation H2SO4+2NH3 @(NH4)2SO4. What mass of ammonium sulfate will result from the reaction of 5.00 g of NH3?
June 19, 2013

Math
This does not explain how to come up with the right answer for me. I have worked it out several times and come up with the same answers, which I posted above. Can someone work this out so I can see what I have done wrong and can learn from my mistakes...
May 29, 2013

Math
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) (my answer was 100.9...
May 29, 2013

Math
A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c) What is the ...
May 29, 2013

math
A and B are events defined on a sample space, with the given probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A | B) = 0.43 and P(B) = 0.75
May 28, 2013

math
Three hundred twelve viewers were asked if they were satisfied with TV coverage of a recent disaster. Gender Female Male Satisfied 90 53 Not Satisfied 124 45 (a) Find P(satisfied). (Give your answer correct to two decimal places.) (b) Find P(satisfied | female). (Give your ...
May 28, 2013

Math
A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c) What is the ...
May 28, 2013

statistics
A and B are events defined on a sample space, with the following probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A) = 0.5 and P(B | A) = 0.4
May 26, 2013

statistics
These data were generated using the equation y = 2x + 1. A scatter diagram of the data results in five points that fall perfectly on a straight line. x 0 1 2 3 4 y 1 3 5 7 9 (a) Find the correlation coefficient.
May 26, 2013

Chemistry
Calculate the [H3O+] and pH of each polyprotic acid solution. (b) 0.116 M H3C6H5O7 I did part (a) just fine, but for some reason can't figure (b) out. Can someone help me with just the [H3O+] part to get me started? I already got 9.3e-3 and 1.4e-3 without success and only ...
April 6, 2013

chemistry 2 college
explain how to find the mass of solute in the solution: 50.0g of solvent in a 10.0% NaCl solution?
March 24, 2013

Stats
The area between the mean and a Z score of +1.50 is 43.32%. This score is higher than ___ of the score in the distribution.
February 1, 2013

Chemistry
My Chem professor is out for the weekend and I'm confused about what the question is asking or the equations needed... A 10.0-g block of pure nickel (Cp = 0.445 J/g-°C) is brought to each of the temperatures below. A sealed beaker containing 15.0 g water at the ...
January 26, 2013

chemistry
Ah, yes it does! Here are the three complete: (a) 2 H2S(g) + 3 O2(g) -> 2 H2O(l) + 2 SO2(g) [2(-285.8)+2(-296.8)] - [2(-20.6)] = (-571.6 + -593.6) - (-41.2) = -1124 (-1124.0?) (b) N2O4(g) + 4 H2(g) -> N2(g) + 4 H2O(g) [4(-285.8)] - [1(11.1)]= -1154.3 (c) SO2(g) + 1/2 O2(...
November 17, 2012

chemistry
I noticed that right after I wrote you, and typed in -1154.3 thinking I had solved it, but the program rejected it. I don't know any other possible answer. I did the equations the same way for all three reactions, and the third one was counted correct while the others are ...
November 17, 2012

chemistry
I saw, and it was SO helpful! Thank you!! Okay, here is how I did (b): (4)x(-285.8) - (1)(11.1)=-1150
November 17, 2012

chemistry
Use standard enthalpies of formation to calculate ΔHrxn° for each reaction. (See the appendix. Enter your answer to the tenth place.) (a) 2 H2S(g) + 3 O2(g) 2 H2O(l) + 2 SO2(g) (b) N2O4(g) + 4 H2(g) N2(g) + 4 H2O(g) (c) SO2(g) + 1/2 O2(g) SO3(g) These are so easy, but...
November 17, 2012

chemistry
November 16, 2012

chemistry
NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid dissolves) is 22.4&...
November 16, 2012

english 125
identify at least one major similarity and one major difference between the forms of the short story and the poem.
June 7, 2012

eth 125
Throughout most of U.S.history in most locations, what race has been the majority? What is the common background of most members of this group?
March 14, 2012

physics
Under what conditions can you use the formula W=Fnetd to calculate the work done on an object? Describe 2 requirements. What conditions would an applied force increase and decrese the energy of any object.
February 25, 2012

here are the correct answers: 1.C 2.B 3.A 4.D 5.B 6.D 7.C 8.A 9.B 10.D 11.A 12.B 13.C 14.B 15.A 16.C 17.B 18.A 19.C 20.A 21.C 22.D 23.A 24.C 25.D
January 30, 2012

solution
how much oxygen would be found in 10.0gal of water at 20c
December 12, 2011

What federal agency produces a report projecting healthcare expenditures for the coming decade?
July 12, 2011

Health systems can be formed through which of the following mechanisms Ownership Not-for-profits For-profits Mergers
July 12, 2011

algebra
how do you subtract 7.9 from 21
July 8, 2011

math
How do you find out what percent one number is of another?
May 2, 2011

public speeking
Also what about game show contestants? They have to get up in front of others and either answere questions or do some sort of stunt. That can not be too nervous b/c they might mess up
April 27, 2011

public speeking
What might be some modern examples of speech styles that weren't discussed in the lecture? Defend why you consider these to be modern styles. In the lecture-new channels of speaking that have developed as a result of changes in technology. New forms of communication, such ...
April 27, 2011

public speaking
What are some moderen examples of speech styles?
April 27, 2011

carol miller went to europe and forgot to pay her \$740 mortgage payment on her new hampshire house. for her 59 days overdue on her payment, the bank charged her a penalty of \$15 (assume 360 days) what was the rate of interest charged by the bank?
April 14, 2011

physical science
As the number of carbon atoms in the compound increases, what pattern do you see in the boiling points? What general pattern do you see in the melting points?
March 17, 2011

physics
A bomber flies horizontally with a speed of 235 m/s relative to the ground. The altitude of the bomber is 3570 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically un- der the point of...
January 11, 2011

Healthcare
What current issues affect positive communication in health care organizations today?
December 16, 2010

Healthcare
What current issues affect positive communication in health care organizations today?
December 16, 2010

Healthcare
What current issues affect positive communication in health care organizations today?
December 16, 2010

SOCIAL STUDIES
AFTER THE REVOLUTIONARY WAR,WHAT HAPPENED TO THE COLONISTS
May 20, 2010

statistics
in certain manufacturing processes parts must be machined tonwithin specified tolerences. the parts must have a mean length of of six inches plus or minus 0.26 inches .A SAMPLING PROCEDURE HAS BEEN ESTABLISHED to determine wether the ten parts are within the specified ...
March 16, 2010

math
Solve. x+1/3 + x+2/7 =2
January 24, 2010

psych
Create a Microsoft? PowerPoint? presentation which briefly summarizes how psychological disorders are classified including the role of the DSM IV. The presentation must have at least one slide for each of the major classes of psychological disorders.
July 20, 2009

m
Solve for d C=9d answer: d= -C+9
January 6, 2009

math
Thank you
January 6, 2009

math
Solve by multiplication principle -2x is greater than 1/9 answer: x is greater than -1/18
January 6, 2009

math
So the slope would be all numbers? Or is it just undefined? I have to give exact numbers.
January 6, 2009

math
x=-2 does not have a slope does it?
January 6, 2009

math
So I come out with s=169/45 right? Then I substitute that into one of the equations to get r correct?
January 6, 2009

math
Solve using elimination method 2. 2r-7s=-31 7r+2s=24 answer: (230/53,-468/53) This is one of the elimination problems that i cannot figure out
January 6, 2009

math
is this correct? find the slope (1,6) (-6,-5) -5-6 -6-1=11/7
January 6, 2009

math
Thank you Damon! Can you help me with the formula to solve by elimination?
January 6, 2009

math
Can someone please check my work? Solve using substitution method 1. 3x+2y=12 x=52-6y answer:-40.8 I am pretty sure that one is wrong. Solve using elimination method 2. 2r-7s=-31 7r+2s=24 answer: (230/53,-468/53) 3.3x+4y=3 6x+8y=6 answer: No answer. problems eliminate eachother
January 6, 2009

math
Could someone please check these for me? 1. Find the function value if x=2 f(x)=x^3 F(2)=8
December 4, 2008

math
The table lists data regarding the average salaries of several professional athletes in the years 1991 and 2001. year average salary 1991 \$263,000 2001 \$1,430,000 a)Use the data points to find a linear function that fits the data. b) Use the function to predict the average ...
December 4, 2008

algebra
So that would be undefined?
November 23, 2008

algebra
find the slope of (-4,-4) (3,-4) I came out with 0/2 so how would i type the answer
November 23, 2008

10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in BTU's for a modern house with a square feet of flooring. A) determine the minimum furnace output for a 2100 ft squared modern house. B) solve formula for a Answer:a) 630,000 b) unsure...
November 5, 2008

Algebra 1
7)use cummutative law to find and equivalent expression 73+yz answer: I don't even know where to start with this one
November 5, 2008

Algebra 1
10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in BTU's for a modern house with a square feet of flooring. A) determine the minimum furnace output for a 2100 ft squared modern house. B) solve formula for a Answer:a) 630,000 b) unsure...
November 5, 2008

Algebra 1
Thank You! I am only having problems with 9 more questions. 2)find -x when x=-92/29 Answer: 92/29 7)use cummutative law to find and equivalent expression 73+yz answer: I don't even know where to start with this one
November 5, 2008

Algebra 1
November 5, 2008

algebra
Thank you
November 5, 2008

algebra
find -x when x -92/29 wouldn't this be 92/29
November 5, 2008

Algebra 1
11) Tell which real number corresponds to the situation. During a quiz, a person loses 1800 pts. answer: -1800 12) Solve for y z=yq Answer: z-q=y 13) Solve using the multiplication principle 10x=-90 Answer: x= -9 14) Collect like terms 20w+w+14/19w Answer: 413w 16) A mountain ...
November 5, 2008

Algebra 1
7) Use cummutative law to find an equivalent expression. 73+yz Answer: 73(y+z) I know this one is wrong but I cannot figure out how to do the problem. 8) Simplify 6[5-9(3-1] Answer: -70 10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in ...
November 5, 2008

Algebra 1
Thank you very much
November 5, 2008

Algebra 1
Can someone please check my answers? Thank You 1) Find an equivalent expression without parenthesis -(y+87) Answer: -y-87 3) Solve -3x-13x=96 answer: x= -6 4) Find the decimal notation 14/25 Answer: .56 5) Divide if possible 7/0 Answer:0 6) Solve 7x+10=52 Answer: x=6
November 5, 2008

math
find -x when x -92/29 wouldn't this be 92/29
November 5, 2008

math
a diver dives to 84m. If the diver rises 5 meters per min for 10 min. Where is the diver in relation to the surface. The answer would be 34 meters right?
October 31, 2008

math
I do not even know where to start with this one, can someone help? the peak of a mountain is 19,340 ft above sea level. what is the integer that best expresses the given number?
October 31, 2008

math
Thank you
October 22, 2008

math
find the best buy on cashews a.12oz for \$5.39 b.1lb4oz for \$7.39 c.10oz for \$4.89 d.1lb for \$6.39 B)Is this correct
October 22, 2008

math
I am sorry It is 8gal 7qt minus 3gal 2 qt
October 22, 2008

math
well it equals 5gal 5 quarts There are 4 quarts in a gallon so that translates to 6 gal 1 qt right? it was a multiple choice question a 5gal 2 qt b 5gal 3qt c6gal 3 qt d 6 gal 1qt D is the only locical answer right?
October 22, 2008

math
8gal 7qt minus 5gal 2qt= 6gal 1qt Is this right
October 22, 2008

economics
I am writing a paper on the technology industry. Can anyone guide me to some good sites to find information on the following: 1.shifts and price elasticity of supply and demand 2.positive and negative externalities 3.wage inequality 4.monetary and fiscal policies The problem I...
October 22, 2008

math
5.is 3.671 less than 3.67 yes 6.A triangle has a base of 13 feet and an altitude of 7 feet. Find its area. 45.5 7.find the best buy on cashews a.12oz for \$5.39 b.1lb4oz for \$7.39 c.10oz for \$4.89 d.1lb for \$6.39 A. 12oz for \$5.39 8.8gal7qt+3gal2qt= 6gal1qt
October 22, 2008

math
4. If 1 gallon of water weighs 8.34lbs, how much does 3.75 gallons weigh? 31.275lbs
October 22, 2008

Math
Could someone check over these for me? Thank you soooooooo much! 1.Maria earns \$14/hr. Last week she worked 7 hour days for 4 days. What was her gross pay? \$392 2.Arrange the given fractions from smallest to largest. 3/10,1/9,1/12 1/12,3/10,1/9 3.write the following as a ...
October 22, 2008

math
Thank you I am having a hard time with this class
October 22, 2008

math
Turner agrees to buy a boat for \$2,800 down and \$129 a month for 48 months. What is the total cost of the boat? \$8,992 This would be 129x48=6192+2800=8992 Right?
October 22, 2008

math
Someone please check my answers 1.In the number 854,263,189 what number tells the number of millions. 4 2.Write 4x4x4x4x4 as a power of 4 4^5 3.write 684 in expanded form 600+80+4 4.Turner agrees to buy a boat for \$2,800 down and \$129 a month for 48 months. What is the total ...
October 22, 2008

math
14/18- (-13/18)=27/18=3/2 or 1 1/2 is that right?
October 19, 2008

math
thank you
October 19, 2008

math
7/9 - (-13/18)=
October 19, 2008

math
-21-(-21)= would this be 0 or 42
October 19, 2008

math
find the reciprocal of (-1/5)(15)=
October 16, 2008

math
Thank you very much!
October 16, 2008

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