Saturday

July 26, 2014

July 26, 2014

Total # Posts: 95

**Geometry**

Hello I'm in Geometry, in Connections Academy. I would love to help, but I don't have that specific quiz for some reason... What are the questions???

**Statistics**

How do you know what the z-value is? I've never used a z-table.

**Bus Math**

i need to earn 61000 over 5 years. at 6% interest semiannually what is my first deposit?

**Chemistry**

I did step by step but answer doesn't match any of the choices it gives me

**Chemistry**

Repost .. Saccharin is a weak organic base with a Kb of 4.8X10^-3. A 0.672-g sample of saccharin dissolved in 30.0mL of water had a pH of 12.34. What is the molar mass of saccharin?

**Chemistry **

Consider the reaction CO3^-2+H2O<==>HCO3^+OH^-. Kb for CO3^-2 is 2.1x10^-4 at 25 Celsius . What is Ka for the HCO3^- ion at 25 Celsius?

**Chem**

Consider the reaction CO3^-2+H2O<==>HCO3^+OH^-. Kb for CO3^-2 is 2.1x10^-4 at 25 Celsius . What is Ka for the HCO3^- ion at 25 Celsius?

**Chem**

Saccharin is a weak organic base with a Kb of 4.8X10^-3. A 0.672-g sample of saccharin dissolved in 30.0mL of water had a pH of 12.34. What is the molar mass of saccharin?

**Chemistry **

Repost:: sorry couldn't understand it What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5

**Chemistry **

A solution of aniline(C6H5NH2, Kb=4.2x10^-10) has a pH of 8.69 at 25 Celsius. What was the initial concentration of aniline? I have so far don't know if it's right: *. [H3O]=10^-8.69=2x10^-9 * 4.2x10^-10=(2x10^-9)^2 / x X=1.2x10^-8 (correct???)

**Chemistry**

Ok now I'm more lost and confuse with both ways if solving this problem...HELP!

**Chemistry**

What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5

**Chemistry **

A 8.5 x 10^-3 M solution of acetic acid is 4.6% ionized at 25 degree Celsius. in a 8.5 X 10^-4 M solution, the percentage of ionization would be? A.the same B.>4.6% C.<4.6% D.zero E.100%

**math**

A survey by Men’s Health magazine stated that 40% of men said they used alcohol to reduce stress. At 0.10, test the claim that a random sample of 100 men was selected and 30 said that they used alcohol to reduce stress. Use the P-value method.

**phyiscs**

i feel like slapping myself across the face... i completely forgot about gravity...

**phyiscs**

What is the spring constant of a spring that stretches 2.00 cm when a mass of 0.600 kg is suspended from it? Answer i know the answer is 295 n/m but im nto sure how they got to it,

**physics**

just draw out a picture and you will see the obvious answer

**social studies**

write three questions to ask farmers about new machinery and farming techniques that helped them from the great plains

**5th grade math**

E 12.65 15%/100=x/11 cross multiply to get 165=100x and divide both side by 100 to get x=1.65 that is the tip add the tip to his total off 11 dollars; 11+1.65 to get 12.65

**algebra**

looks like ur trying to pass off ur homework on us...

**precalculus**

how do i change this into a standard ellipse equation 2x^2 + y^2= 3 , like i know i divide both side by 16 and get (2/3)x^2 +y^2 / 3= 1 but i dont know what to do with that 2/3 in front of the x

**trigonmetry**

find all solutions for tan^2 theta -4 = 0 i got theta = arctan 2 is that correct? and if it is how would i write it as a solution?

**trigonometry**

how do i simplify (secx - cosx) / sinx? i tried splitting the numerator up so that i had (secx / sinx) - (cosx / sinx) and then i changed sec x to 1/ cosx so that i had ((1/cosx)/ sinx) - (cos x / sinx) after that i get stuck

**trigonometry**

im well aware of that steve thank you for answering but i really wanted to know was is it at all possible to use factoring to solve this like i have up there

**trigonometry**

can i use factoring to simplify this trig identity? the problem is sinx + cotx * cosx i know the answer is cscx and i know how to get it but i want to know if i can do factoring to get it bc i tried to but it wont give me the answer . this is the step i went through: 1) sinx +...

**Math**

How much money should be deposited today in an account that earns 6.5% compounded monthly so that it will accumlate to $8,000.00 in three years?

**CHM formula needed, pls?**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.

**CHM**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol. Need the formula to understand how to continue with more problems.

**Chemistry..**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.

**college algebra, Please help!!**

the graph was shifted up 3 from the original graph that's all the question wants to know

**Pre-Calculus**

i can narrow it down for you its either b or d

**arithmetic**

- 9 + 2 = 2 + (-9) -7= -7

**trigonometry**

actually could i take the arctan of -5/4? would that give me the degree?

**trigonometry**

Suppose (x, y) =(4, -5) and θ is an angle in standard position with (x, y) on its terminal side. What is the degree measure of angle θ? im not sure how to do this one problem plz show step by step

**Trigonometry**

(+ or -) i times sqrt of 5 / (+ or -) i times sqrt 7

**statistics**

An automatic machine that fills bags of unpopped popcorn is operating properly if the weights are independently and normally distributed with a mean of 114 grams and a standard deviation of 4.9 grams. Find the probability that if 7 bags are randomly selected, their mean weight...

**statistics**

An automatic machine that fills bags of unpopped popcorn is operating properly if the weights are independently and normally distributed with a mean of 114 grams and a standard deviation of 4.9 grams. Find the probability that if 7 bags are randomly selected, their mean weight...

**Business Finance**

Need step by step explaination for soulution: A firm has net income of #2,610 and tax rate of 33%. The revenue is $20,400, cost are 78 percent of sales, and interest expene is $100. what is th edepreciation expense for the years?

**physics**

A motor car moving at a speed of 72 km/h can not come to a stop in less than 3 s while for a truck this time interval is 5.0s . On a highway the car is behind the truck both moving at 72 km/h . The truck gives a signal that it is going to stop at emergency. At what distance th...

**Financial Management**

Consider the following cash flows (CF's) (i) A single CF at t=5 of $15,000 (ii) A single CF at t=11 of of $10,000 and (111) A single cash flow CF at t=18 of $15,000 Calculate the present value of these CF's at time t=0 interest is 4 percent compounded each period.

**math**

Draw a big diagram You end up with a triangle with: the horizontal side = 47 ft the side representing the leaning pole ... call it a and the angle opposite the pole side = 51° The pole makes an angle of 7° with the vertical ... so the angle between to pole side and the...

**AP CHEMISTRY**

A,E INCREASES B,C,D DECREASES

**Chemistry**

DrBob222 you are very unclear.... why did you do all that?

**Business And Finance Mathematics**

Total current assests(CA)$20,000 Accounts receivable(AR) $10,000 Current Liabilities(CL) $11,000 Inventory(INV) $4,000 Net sales $30,000 Total assests $25,000 Net income $5,000 1. Calculate current ratio. A. 1.82 B. 1.80 C. 1.28 D .182 2.Calculate acid test. A. 1.52 B. 1.45 C....

**math**

Sean began painting his house on Monday. He worked 5 hrs longer painting on Tuesday than he had on Monday. On Wed he worked 4 hrs. less than on Tuesday. On Thurs he painted 6 hrs longer than on Wed. He painted for 11 hrs on Thursday. How long did he paint on Monday?

**algebra**

(x) =29.95 + 200 @ x = 300 where c (x) is the cost of making x pairs of shoes

**math**

vbcvbv

**english**

hello! I made short and simple. On Thursday, Ocuupy Wall Street celebrated its two month anniversary. They are students, unemployed, salaried, immigrants or artists. They doen't have leaders. They are stick of the powerful banks that take up again with the profits whereas ...

**english**

Thanks Writeacher and I'll let you what I will say, I promise

**english**

Hello! I am a senior student who lives in Paris, therefore English is my seocnd language. I need help to my examen oral. Tomorrow, I have to talk about: "Occupy Wall Street" movement (what's happening? analyzing the situation, is the movement important? can the m...

**english**

thanls Mrs Aka

**english**

Hello! I'm a French student,I'm 17, I've learned the beginning of Freedom by Jonathan Franzen. Sometimes, it seems confused as it's my second language. So I need help, please. Can you explain what happened with Patty, Eliza, Carter, Richard and Walter in the ch...

**english**

Im writing a argument essay about PETA and I cant seem to come up with a thesis…..I need help plz.

**algebra**

7x + 3y = 42 graph this equation using the intercepts method graph this equation using the intercepts method

**Algebra**

In 1993, the life expectancy of males in certain countires was 62.3. In 1999, it was 66.1 years. Let E repesent the life expectancy in year t and let t represent the number of years since 1993. The linear funtion that fits the data E(t) =

**english**

Very is the adverb. How fearful? VERY fearful

**algebra**

noone knows the answers ?

**physics**

the answers are supposed to be in m/s^2

**physics**

A space shuttle is launched from rest. It takes 8.00s to reach 165km/h , and at the end of the first 1.00 min its speed is 1650km/h . a) what is the avg. acceleration in (m/s2) during the first 8.00 seconds? b) what is the avg. acceleration in (m/s2) between the 8.00 seconds a...

**Physics**

The boy on the tower of height h = 20 m in the figure below throws a ball a horizontal distance of x = 56 m. At what speed, in m/s, is the ball thrown?

**Physics**

The boy on the tower of height h = 20 m in the figure below throws a ball a horizontal distance of x = 56 m. At what speed, in m/s, is the ball thrown?

**Physics**

The boy on the tower of height h = 20 m in the figure below throws a ball a horizontal distance of x = 56 m. At what speed, in m/s, is the ball thrown?

**french**

complete the following sentences withthe appropriate articles. le,la,l;,les est-ce que tuas------disques? -----etudiante parle avec le professeur

**physics**

where did u get 105,000 m/h from?

**Math**

Solve for x in terms of p and q if p^2x=x-(2p-1)/p. How would I do this if this if there is no q? I think that someone made a typo on the problem and if that is so how would I solve it for just p?

**Math**

Simplify the expression csc@cos@tan@. What is the best way to solve this?

**Math**

Im not sure where to begin on this problem: g(x)= -492x^3-492x^2+308x-5 What are the only possible integer roots of g?

**geometry**

find the radius of the circle inscribed in a triangle whose sides are 15cm, 17 cm and 8cm?

**Chem**

Which salt has the highest molar solubility in pure water? Cd(OH)2, Fe(OH)2, PbCrO4, CdCO3, Mn(OH)2

**physics**

vb

**economics**

a monopolist, has a total cost curve given by TC = 5Q + 15. He sets two prices for his product, a regular price, PH, and a discount price, PD. Everyone is eligible to purchase the product at PH. To be eligible to buy at PD, it is necessary to present a copy of the latest Vietn...

**physics**

there is no masses or spring constants and yes one block is on top of the other, thank you for the help!

**physics**

The two blocks in the figureoscillate on a frictionless surface with a period of 1.7s . The upper block just begins to slip when the amplitude is increased to 38cm . What is the coefficient of static friction between the two blocks?

**Intergovernmental Relations**

I am doing a paper on the balance of power between federal local and state governments in the even of a national disaster. One of the questions posed to me was Should the federal government's superior financial resources supersede concerns about overcentralization. I feel ...

**Quantitative Methods**

i used the site (thx a bunch) but after i get the area i am confused as to how i get the final answer? the area for b is .066807 but i am not sure what to do next

**Quantitative Methods**

The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a standard deviation of $500. a. What is the random variable? b. The mayor of Daisy City makes $2250 a month. What percentage of Daisy City's residents has incomes that are more ...

**Quantitative Methods**

thx that really helped, however for c i thought it was mutually exclusive so i added the two probabilities .25 and .35. i didnt realize that i needed to include the rejection percentage.

**Quantitative Methods**

Assume you have applied to two different universities (lets refer to them as Universities A and B) for your graduate program. In the past 25% of students (with similar credentials as yours) who applied to University A were accepted, while University B accepted 35% of the appli...

**Quantitative Methods**

thx for your help, i had that for a but for b i use p(a) = 1-p(b) and for c i used P(a or b) = .25 + .35 = 60 and for d i caluculated that p(a): 1-.25 =.75 p(b): 1-.35 = .65 then i multiplied the two .75*.65=.4875 = 48.75% I really appreciate your assistance

**Quantitative Methods**

Assume you have applied to two different universities (lets refer to them as Universities A and B) for your graduate program. In the past 25% of students (with similar credentials as yours) who applied to University A were accepted, while University B accepted 35% of the appli...

**chemistry**

DBEAC is the ANSWER!

**ALGEBRA PLEASE HELP?!!**

x+y=670 7x+5y=3740 __________ -7x-7y=4690 -2y=-900 y=450 i dont get this at all, can somebody please explain? thanks(:

**math algebra please help!**

my teacher: me: (1) x+y=670 " ? " (2) 7x+5y=3740 somebody please __________ explain this to me (1) -7x-7y=4690 step by step, thanks:) -2y=-900 y=450

**math, algebra please help!**

-7x-7y= 4690

**math**

factor 100x^2 - 81

**Math**

Write 9+7 as a sum of three numbers, two of which add to 10.

**10th grade**

wats a abstract noun for these: 1.quaterback 2.scream 3.perfume 4.pepper 5.bruise 6.dog 7.binoculars 8.teeth 9.lamb 10.book

**history**

how did king leopold develop his image as a great humanitarian leader?

**History**

How did King Leopold develop his image as a great humanitarian leader?

**History**

colonialism in the congo: Conquest, conflict and commerce study guide part 2

**History**

why did leopold want to defeat the swahili traders in the eastern areas?

**math**

Let A= [7 -4 4] [-4 5 0] [4 0 9] a) Orthogonally diagonalize A b) Use answer from a) to construct a spectral decomposition for A. c) Suppose that x=[1 2 1] and let u be the eigen vector from a) corresponding to the largest eigen-value of A. If W=Span {u}, then use b) to decomp...

**math,algebra**

I have been trying to understand why they are important now for hours and I only get more confused as i go

**Algebra**

Using the index of a series as the domain and the value of the series as the range, is a series a function? Include the following in your answer: Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the arithmetic series? Which one of th...

**Eth125**

Clearly nothing has changed since 2007 cause I'm looking for help for the same question and it's now June 2010. Geez!

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