Tuesday
July 22, 2014

Posts by vivian


Total # Posts: 109

soc 313
ella miller and her family issues

math
in an album, the ratio of the number of local stamps to the number of foreign stamps was 7 : 4. When Lucy gave away 8 local stamps and 8 foreign stamps, there were 1.8 as many local stamps as foreign stamps in the album. find the total number of stamps Lucy had in the end.

Math
Two fishing boats depart a harbor at the same time, one traveling east, the other south. The eastbound boat travels at a speed 7 mi/h faster than the southbound boat. After seven hours the boats are 91 mi apart. Find the speed of the southbound boat.

physics
sin 27=0.45=59/x => x=115.69 tan27=0.51=59/y => y=131.11 ratio=y/x => ratio= 1.1

9th grade Geography
what shape describes the united states

Math
lee and his family are planning a hiking trip on the Appalachian trail. they are packing food in 2lb bundles. how many bundles can they make with 36 lb of food? write a number sentence to help you solve this problem.

college algebra
i need help with elimination and substitution linear equation

Science (chemistry)
Pls help.. Q: prepare a table of value for acid-base titration using 26.40cm^3 as end point

Chemistry
Two liquids A and B have vapor pressures of 71.3 and 131 mmHg, respectively, at 25 degrees Celsius. What is the total vapor pressure of the ideal solution made up in the following concentrations? 1.00 mole of A and 1.00 mole of B 2.00 moles of A and 5.00 moles of B

Algebra
if a ball standing on four legs wetght 1,200 pounds,how much will this bull weigh when standing on three legs

Hypothesis - Statistics
At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine...

math
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval.

math
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000. Pilot studies suggest that the population standard deviation is $70,000. Estimate the minimum sample size needed to estimate the populat...

programming in c++
a program in c++ that accepts exam marks for 10 students and stores them in an array.the program should then calculate and utput the average marks for the class.and give an account of marks below average and output all marks above average.

chemistry
A mixture of 16 g of salt and 47 g of baking soda is poured into 296 ml of water. What is the total mass of the mixture in grams?

Geometry
If the two lines are perpendicular, what is x + y 2y- 10 2x+1

chemistry
Calculate the theoretical pH when 5.00 ml of 0.0100 M HCl is added to 30.00 mL of deionized water.

math
explain how to compare 0.34 and 0.27

math
Mia is stacking copies of a new book in a square-pyramid display by the front window of her bookstore. for each consecutive layer, she places one book where four meet. A. I the bottom row of the display has 144 books and there is one book on the top, determine how many rows of...

Calculus 2
how do we know if the curve theta = pi/2 is a circle, or semicircle, or spiral? I've tried to change the curve to x and y, but both sides of the equation are the same, and tan(pi/2)=infinity.

chemistry
2 solutions of equal amounts in a u-tube are separated by a semipermeable membrane. The level os the (more/less( concentrated will rise. I think the answer is (more) but I'm not sure. What do you think?

Chemistry
Which of the following solutions will have a higher boiling point? A. 1m C6H12O6 B. 1m NaCl C. 1m MgCl2 D. 1m AlCl3 And pls explain why it is. Thank you so much!!

Calculus
∫[(x+3)/(x^2 +9)]=????? Can you give me a hint for solving it?

chemistry
The freezing-point depression is -0.930 Celsius degree. Determine the molality of the solution of an unknown nonelectrolyte in water. Please help!! I do not understand this problem!

arithmetic
The first three terms in an arithmetic are given by x,4x+5 and 10x-5.find the value of x.

organic chemistry--please help me!!!
Give equations to show how sulfuric acid can convert 4-methylcyclohexene into a mixture of four isomeric c7H12 compounds(including starting material). Predict the relative amounts of each isomer.

Maths
Calculate the volume and curved surface area of a cone 14cm in base diameter and 24cm high

Maths
A right pyramid on a base 4cm square has a slant edge of 6cm.calculate the volume of the pyramid

organic chemistry --please help me!!!!!!!!!!!!!!!
Calculate the theoretical yield for the bromination of bothstilbenes and cinnamic acid, assuming the presence of excesspyridinium tribromide. cinnamic acid - 150 mg cis-stilbene - 100 μL trans- stilbene - 100 mg pyridinium tribromide - 200-385 mg

organic chem
How do injector temperature and detector temperature affect retention time of a compound in gas chromatography?

organic chem
An unknown compound melted at 131-133°C. It is thought to be one of the following compounds(mp,°C): trans-cinnamic acid (133-134); benzamide(128-130); DL-malic acid(131-133); or benzoin(135-137). The mixture melting points of the unknown compound with each of the test ...

organic chem
in simple distillation or fractional distillation do the changes in temperature occur more gradually? and why?

organic chem
why should we notify the laboratory instructor of any incidents that occur in laboratory?

organic chem
what steps should we do if a large bottle of acetone is broken and spilled in the laboratory?

organic chem
what steps should we do if ethanol in a beaker ignites in the laboratory?

Business Math
Earl wants to retire to San Diego when he is 65, he is now 50. He will need $300,000.00, how much would he have to invest today @6% interest compounded semiannually to meet his goal?

business math
Greg will need $218,000.00 in 15yrs for college bills, how much does he have to invest today @8% compounded semiannually?

chemistry
i checked through my work and I found out i didn't do square root for the x^2....thats why my answer was double 6.011.

chemistry
i worked through it just dont know it i did it right...

chemistry
Calculate the pH at the equivalence point for the titration of a solution containing 1250.0 mg of hilariamine (MW = 92.5 g/mol, Kb = 8.1×10−4) with 0.1000 M HCl solution. The volume of the solution at the equivalence point is 175.0 mL. (I got the answer to be 12.02...

chemistry
Calculate the pH at the equivalence point for the titration of a solution containing 1250.0 mg of hilariamine (MW = 92.5 g/mol, Kb = 8.1×10−4) with 0.1000 M HCl solution. The volume of the solution at the equivalence point is 175.0 mL. (I got the answer to be 12.02...

chemistry
i got 11.5 but im not sure because the problems i did before i had to change to ka first and that was the pH and got those answers right...but i dont understand why i have to do it this way though its the right way...quest is saying its wrong..

chemistry
What would be the pH of a 0.563 M solution of ammonia (NH3) at room temperature? The Kb of ammonia is 1.78 × 10−5. 1. 2.5 2. 7 3. 9 4. 4.5 5. 11.5 ( I did this problem but apparently 4.5 isnt the answer)

chemistry
What would be the pH of a 0.563 M solution of ammonia (NH3) at room temperature? The Kb of ammonia is 1.78 × 10−5. 1. 2.5 2. 7 3. 9 4. 4.5 5. 11.5 ( I did this problem but apparently 4.5 isnt the answer)

chemistry
Consider the ionization constants hypochlorous acid (HOCl) : Ka = 3.5 × 10−8; ammonia (NH3) : Kb = 1.8×10−5. A solution of ammonium hypochlorite (NH4OCl) is 1. acidic, because the cation hydrolyzes to a greater extent than the anion. 2. basic, because t...

chemistry
The problem didnt include Ka

chemistry
i did it and used 6.2E-10. my answer wasnt there so i was wondering if i did something wrong..i got 7.11 for pH

chemistry
What is the pH of 8.94 × 10−6 M HCN(aq), ignoring the effect of the autoprotolysis of water? 1. 7.17923 (basic; thus not reasonable) 2. 6.03594 3. 7.30027 (basic; thus not reasonable) 4. 5.50032 5. 7.38101 (basic; thus not reasonable) 6. 5.18207 7. None of these

chemistry
Calculate the pH of the solute in an aqueous solution of 0.0047 M codeine, if the pKa of itsconjugate acid is 8.21. What is the percentage protonation of the solute?

chemistry(Acid&Base)
is the answer 2)5.3....

chemistry(Acid&Base)
Calculate the solubility product of calcium hydroxide if the solubility of Ca(OH)2(s) in water at 25◦C is 0.011 M. Choices: 1. 1.1 × 10−5 2. 5.3 × 10−6 3. 2.7 × 10−6 4. 1.5 × 10−8 5. 1.2 × 10−4

history
What ultimately changes John Adams's mind and favor of American revolution?

history
how did john adams feel about the behaviors of son of liberty?

biology
what are examples of enzymatic disorders? How do the diseases involve enzymatic reactions?

general biology
why is yeast used in the experiment of respiration?

Physic
how does the M.A and the I.M.A of the inclined plane vary with the inclination angle?

Physics
how does the MA and the IMA of the inclined plane vary with the inclination angle?

Physics
how does the MA and the IMA of the inclined plane vary with the inclination angle?

Physics
how does the M.A. and the I.M.A of the inclined plane vary with the inclination angle?

physics
how does the M.A. and the I.M.A. of the inclined plane vary with the inclination angle?

literature-help me PLEASE?
Explore the theme of loneliness and discuss how the writer has conveyed this to the reader through their use of language and style.The poems, Night Waitress by Lynda Hull, The Lady in The Pink Mustang by Louise Erdrich, and Those Winter Sundays by Robert Hayden. please help me...

literature
Can sadness be loneliness?

literature-help me PLEASE?
how does Eudora Welty use dialogue to establish characters and character relationship in A Visit of Charity?

History
What creatures did the europeans introduce in the new world?

english--Please help me!!!
"Most Americans would follow a thinker rather than become one themselves." Please help me explain that sentence, and also give me examples!!!who is a thinker?? in what situation do they follow the thinker, and why????

math
s=1/2(a-b)x find b

math
I just did 180m/1 day times 1 day/1440 minutes Hope this hdlps

Chemistry
what is a common physical property of ester?

social studies
What did the Spanish hope to do in California?

chem
Ka=1.8x10^-5. How do you calculate the value of pKa?

chemistry
how do I plot absorbance vs concentration and transmittance %T vs concentration on the same graph??

math
In recent years, Juresic Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant selected the depreciation method for each bus, and various methods were selected. Bus Acquired Cost Salvage Value Useful Life i...

business
In recent years, Juresic Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant selected the depreciation method for each bus, and various methods were selected. Bus Acquired Cost Salvage Value Useful Life i...

math
Information related to Hermesch Company for 2011 is summarized below. Total credit sales $2,200,000 Accounts receivable at December 31 825,000 Bad debts written off 33,000 What amount of bad debts expense will Hermesch Company report if it uses the direct writeoff method of ac...

Sociology-please help me!
why is the gap between the rich and the poor growing according to Robert Reich in "What happned to the American Social Compact"?

business
Tavarez Company assembled the following information in completing its July bank reconciliation: balance per bank $15,280; outstanding checks $3,100; deposits in transit $5,000; NSF check $320; bank service charge $100; cash balance per books $17,600. As a result of this reconc...

business
A petty cash fund of $100 is replenished when the fund contains $3 in cash and receipts for $93. The entry to replenish the fund would debit Cash Over and Short for $4. credit Miscellaneous Revenue for $4. credit Cash Over and Short for $4. debit Miscellaneous Expense for $4.

business
Internal controls are concerned with?

business
Listed below are five procedures followed by The Beat Company. Several individuals operate the cash register using the same register drawer. A monthly bank reconciliation is prepared by someone who has no other cash responsibilities. Ellen May writes checks and also records ca...

math
On May 31, 2011, James Logan Company had a cash balance per books of $6,781.50. The bank statement from Farmers State Bank on that date showed a balance of $6,404.60. A comparison of the statement with the cash account revealed the following facts. The statement included a deb...

business
On May 31, 2011, James Logan Company had a cash balance per books of $6,781.50. The bank statement from Farmers State Bank on that date showed a balance of $6,404.60. A comparison of the statement with the cash account revealed the following facts. The statement included a deb...

accounting
On May 31, 2011, James Logan Company had a cash balance per books of $6,781.50. The bank statement from Farmers State Bank on that date showed a balance of $6,404.60. A comparison of the statement with the cash account revealed the following facts. The statement included a deb...

math
Eddings Company had a beginning inventory of 400 units of Product XNA at a cost of $8.00 per unit. During the year, purchases were: Feb. 20 600 units at $9 May 5 500 units at $10 Aug. 12 300 units at $11 Dec. 8 200 units at $12 Eddings Company uses a periodic inventory system....

accounting
Eddings Company had a beginning inventory of 400 units of Product XNA at a cost of $8.00 per unit. During the year, purchases were: Feb. 20 600 units at $9 Aug. 12 300 units at $11 May 5 500 units at $10 Dec. 8 200 units at $12 Eddings Company uses a periodic inventory system....

Limits
Lim (tan^2(x)/x) x->0

Calculus
Lim (tan^2(x)/x) x->0

Eth
Did African Americans suffer from segregation?

cultural diversity
Did African Americans have consequences with extermination?

chemistry
write an equation for the formation of a butane.Is this an intramolecular dehydration?Explain.Write an equation for the rection between KMnO4 AND BUTANE

college
I shall argue that this reaction was irrational to a great extent and that to that extent Americans unwittingly cooperated with the terrorists in achieving a major goal: which one is premise and the conclusion?

Bible
Please help me unscramble the Greek word "uiiesp"

science
in gas chromatography, if the two peaks in chromatogram are too close, what changes in experimental conditions could make to separate them more effectively?

Physics
Two points in the xy plane have Cartesian coordinates (2.00, -4.00) m and (-5.00, 5.00) m. (a)What is the distance between these two points? (b) What are their polar coordinates?

Physcology
Final Project: Interview Profile • Resources: Ch. 5 (pp. 213-19); Ch. 6 (pp. 225-38); Ch. 9 (pp. 330-39); Ch. 11 (pp. 441- 46); Ch. 15 (pp. 571-80) in Psychology: An Introduction (12th ed.) Appendix A • Due Date: Day 7 [post to the Individual forum] &Ac...

Physcology
Choose three of your favorite television characters; past or present. Complete the following matrix describing the characters’ personalities from the point of view of the three theorists, Jung, Freud, and Rogers. TV Character Jung Rogers Freud 1. 2. 3.

Organic Chemistry
equation to show interaction of the compound RNH3Cl with NaOH

bio
In word, Describe how you would calculate the concentration of green pigment. Assume that your 1/100 solution had an Abosrbance of 0.8 and that the extinction coefficient for the green pigment is e=2 mM^-1cm^-1. Remember the Beer Lambert Law.

biology
What distinguishes the various types of echinoderms from each other, and what common features allow them to be grouped together?

bio
How do animals get their food? What body plans are associated with each of the major life strategies found in animals?

bio
In heart sound contain of two sound "Lub" and "Dub" When one of these sounds is not distinct, but is more of a gurgle, a person is said to have a heart murmur. What could cause this?

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