Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 635

**math**

Mrs. Grace has 10 sandwiches that are 4 inches in diameter. They can fit exactly into a different box... Need to show work in box, help, can't seem to figure this out

**intermediate accounting**

in 2011 hardin company had 220000 shares $10 par common stock, march 1 issued 45000 shares at $22, June 1 issued 15% stack dividend, July 1 issued 10000 at $27, Aug 31 2-for-1 stock split reduce par $5, determine the weighted average number of shares based on the transactions

**CHEMISTRY **

A voltaic cell is constructed that uses the following reaction and operates at 298 K: 2 Al(s) + 3 Mn^2+(aq) 2 Al^3+(aq) + 3 Mn(s). What is the potential, E, of this cell when [Mn^2+] = 0.10 M and [Al^3+] = 1.5 M?

**Chem HELP !!!**

Using a table of standard electrode potentials (as in Appendix M of your text), calculate the standard cell potential, Eo, for: 2 Fe2+(aq) + Cl2(g) 2 Fe3+(aq) + 2 Cl(aq).

**law**

there are two kinds of law in south africa.write a paragraph in which you identify these two kinds of sources of law;name the examples of sources of law that belong to each kind;and indicate the differences betweem these teo kinds of sources of law.

**Physics**

Two charges repel each other with a force of 10-6N when they are 10cm apart. when they are brought closer together until they are 2cm apart the force between them becomes?

**Math**

The scores of students on standardized test are normally distributed with a mean of 300 and a standard deviation of 40. Between what two values do 99.7% of the test scores lie?

**math- commutative property**

The Answer Is D Because if you have 4 pencils and i have 7 apples, how many pancakes will fit on the roof? well the answer is purple because aliens don't wear hats. Thanks :)

**chemistry**

a 350ml buffer solution is .150M in HF and .150M in NAF. What mass of naoh could this buffer neutralize before ph rises above 4.0? So far I got .285714 from 10^-.544. After that I tried to do .285714(x/.0525-x) but this doesn't worl. The answer is 1.2g. Help, please?

**English **

does anyone know of a website where i can get info on why vampires attract the interest of human beings? thank you its for a essay

**English**

go to easy bib

**math**

On a map of the Fox River, 1 centimeter represents 6.5 kilometers. If a trail by the river is actually 26.65 kilometers long, what is the length of the river on the map?

**Math **

Solve for x: 4(2-x)>8x+20

**chemistry**

What is the final volume in milliliters when 0.700L of a 46.9% (m/v) solution is diluted to 20.1% (m/v)?

**Chemistry-**

Okay, i thought so...I was confused since I'm using N with the units in a formula but I can't seem to find a way to cancel it out. Maybe you would know how? Formula: Z= Zwall x Area 4.18x10^14 mol s^-1 / 6.04x10^23 m^-2 s^-1 = Area 8.4x10^-6 m mol = r How would I elimi...

**Chemistry- **

If I was trying to find out the number of molecules(N) using moles x avogadro's number, what units would N have?

**Chemistry**

A tubular fluorescent lamp in a fully evacuated supply compartment on the international space station was originally filled with a small amount of mercury vapour. When the lamp began to flicker the astronauts complained there was a tiny hole in the tube. They measured that the...

**Maths**

An initial-value problem is given by the differential equation, f(x,y) = –20xy2, y(1) = 1. Use the classical fourth-order Runge-Kutta method with a step-size of h = 0.02, to obtain the approximate value of y(1.02). Give your answer to 6 decimal places.

**Average deviation**

If I'm asked for the average deviation, what is the unit I should use for the answer?

**Chemistry**

An 8.07g sample of impure Ag2O decomposes into solid silver and O2(g). If 395mL O2 is collected over water at 25C and 749.2mmHg barometric pressure, then what is the percent by mass of AgO2 in the sample? The vapor pressure of water at 25C is 23.8mmHg. Could someone help me st...

**Chemistry**

2 NaN3(s) = 2 Na(l) + 3 N2(g) How many grams of NaN3 are needed to produce 20L of N2(g) at 303K and 776mmHg?

**Chemistry**

The half life of U238 is 4.5 x 10^9 yr. A sample of rock of 1.6 g produces 29 dis/sec. Assuming all radioactivity is due to U238 find percent by mass of U 238. I have tried ln(t)/ln(0)= -kt and still cannot get the answer What I get is A) 4.5x10^9 x365x60x60x24=1.419x10^17 for...

**Business math**

A store had 896 swimsuits that were marked to sell at $46.99. Each suit was marked down $15.90. Find the reduced price using the formula M = S – N, where M is the markdown, S is the original selling price, and N is the reduced price.

**Chemistry re-post**

I took a look at this question to see if I copied it correctly, and it does NOT say how much of the solution was used. It does use mols as the unit. Dr. Bob, I am not sure what you mean by "decays into Argon." I realize that the 38 CL decays to Argon, but how would t...

**Chemistry **

I posted this before and am sorry to post again and take up room but it is due this week and I'd like to understand how to get the answer (no one has responded yet): question The nuclide 38cl decays by beta emission with a half life of 40min. A sample of .40 m of H38cl is ...

**Chemistry**

I posted this before a few hours ago without a reply yet but decided I would add more detail: question The nuclide 38cl decays by beta emission with a half life of 40min. A sample of .40 m of H38cl is placed in a 6.24 liter container. After 80 min the pressure is 1650 mmHg. Wh...

**Chemistry **

The nuclide 38cl decays by beta emission with a half life of 40min. A sample of .40 m of H38cl is placed in a 6.24 liter container. After 80 min the pressure is 1650 mmHg. What is temperature of container? I have tried calculating the decay rate of the 38cl and then plugging i...

**chemistry**

write a balanced equation for the chain reaction AL2O3

**Statistics**

is that 2C = 0.0229885?

**mathematic**

OK but really about part C I'm confused. I think it should be 25% or 0.25 but it is wrong!!!!

**math **

solve by the elimination method x + y = -2 4x - 6y = -3

**Calculus**

In a right triangle, if one leg (adjacent to 90 degrees) is 10cm, which is increasing at the speed of 2cm/s; and another leg is 24 cm, which is decreasing at 2cm/s. how fast is the hypotenuse changing at this time?

**Trig**

A plane has a speed of 250mph and flies with a bearing of N35degE. The wind is blowing from the west at 25 mph with a heading of due east. What is the actual speed and heading of the plane? Round to one decimal place.

**chemistry**

A gas with a volume of 4.20 L at a pressure of 0.63 atm is allowed to expand until the volume raises to 95 L. What is the new pressure (in atm)?

**chemistry**

A gas with a volume of 4.20 L at a pressure of 0.63 atm is allowed to expand until the volume raises to 95 L. What is the new pressure (in atm)?

**math**

Put this in exponent form: (3square root of x) ( square root of x cubed)

**Math**

Ill just use log then I think I get tht... but how did u come to 2^x=112...?

**Math**

Mr.Reiny, We don't use logs yet, so how do I find it without using log?

**Math**

Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3square root of x) ( square root of 3 cubed) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using these as examples. Thanks...

**gr 11 Math**

Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3square root of x) ( square root of 3 cubed) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using these as examples. Thanks...

**math**

(3square root of x) ( square root of 3 cubed)

**math**

Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3¡îx)(¡îx©ø) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using these as examples. Th...

**english**

Religion is non-existent and present simultaneously in the form of preconditioning and technology, social classes are used for defining individual purpose and harmony among citizens, and drug use is the backbone for provoking happiness. Would that be a good sentence?

**english**

yeah but how doi make this sentence into a better sentence for the endof my into like the three main points I will be discussing. How do I end my intro?? We r not allowed to us first person.

**english**

There is total social stability, there is almost no disease, very low crime, high rates of happiness and acceptance of death.

**english**

science and technology

**english**

so Ms.Sue, can you help me with my last sentence of intro about what three arguments. I am going to talk about in my body paragraphs.

**English..Ms.Sue(take a look here please)**

hmm.. well I don't know I cant think of any more...at the end how do I put it into a level 4 sentence including what I will be writing about in the body:(

**English..Ms.Sue(take a look here please)**

It can be a utopia since each individual is happy..right? But that is only one can u help me wid the other 2? and putting it all in a sentence... Ms.Sue!!! This is worth 15% it is a summative:( My life stinks...I need ur guidance..

**English..Ms.Sue(take a look here please)**

yes I understand that, I checked the sites out and they say first step is to pick up a topic, which in this case is what I don't understand, then ask a question regarding the topic than answer the question and finally reword the answer. So can u plzzzz help me with the int...

**English..Ms.Sue(take a look here please)**

Discuss the society in Brave New World as a utopia. What should i make my thesis be??? Please help im so lost. It is a utopia •English - Ms. Sue, Tuesday, April 16, 2013 at 1:14pm I think a good thesis would be: Brave New World reflects a dystopia, not a utopia. •En...

**English**

But it says.. discuss the society in Brave new world as a utopia. So don't you think the thesis should be more detailed and well structured.

**English**

Discuss the society in Brave New World as a utopia. What should i make my thesis be??? Please help im so lost. It is a utopia

**English**

Its a utopia as i saiid above

**English**

I have already visited those sites... I have read the book and it is a utopia. I just want a excellent thesis:( but i just cant think of one. Please help me if u can.

**English**

Discuss the society in Brave New World as a utopia. What should i make my thesis be??? Please help im so lost.

**algebra**

In the early months of some year, one site added 0.6 million new accounts every day. at this rate, how many days would be needed to add 30 million new accounts?

**chemistry**

The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)

**math**

Simplify this expression by using the properties of exponents.You may leave your answer as a number to a power. (2c)^5(2c^9)^6=

**Pre-Algebra**

Find 3 consecutive positive integers such that the product of the first and third, minus the second, is 1 more than 5 times the third.

**Psychology**

One way to measure the validity of test would be to:

**Psychology**

The weather person on the evening news reports that the average daily rainfall for the last six months is 10 inches. A farmer is trying to determine how the rain might affect his crops.

**Psychology**

My answer is A.

**Psychology**

Professor Webb is interested in conducting a study on gender differences and coping with stress. He should begin his research by examining:

**algebra**

Thank you so much

**algebra**

y= -x^2-12x+28 A painter can use the formula A=2/3bh to estimate the area of space under the parabola. Calculate area in square ft under each arch ~ if there are 8 arches to be painted how many square ft must be painted ~ if 1 gallon paints 200 square ft , how many gallons mus...

**Math**

Jimmy jumped into a lake from a 12-foot-high cliff with an initial upward velocity of 7 feet per second. Find the time in seconds it took Jimmy to enter the water. Use the model for vertical motion given by the equation h = -16 t squared + vt + s

**Chemistry**

this is the equetion for question 2 CaO+2NH4Cl-2NH3+H2O+CaCl2

**Chemistry**

1. The reaction CO+2H2-CH3OH was carried and it is found that only 332g of CH3Oh is actually produced when 407g CH3Oh was the expected yield. What is the Percent yield? 2. If 112g of CaO is reactied with an excess of NH4Cl and 64.0g of NH3 are produced, what is the percent yie...

**curriculum development**

The size of a play/work area in the class made a noticeable difference in the time children stayed there and were engaged in complex play. The best size area is A) small and open B) large and open c) small and sheltered or d) large and sheltered. is B) large and open correct?

**Exceptional children**

i appreciate ure help! can u check this last one for me The final goal of a functional approach to managing prblem behavior is to a.) change the child b.) replace an inappropriate behavior with a good one. c.) change the environmet or d.) help child understand how to behave. i...

**Exceptional children**

Can you check my answers please Adaptive behaviors are a.) the same as fuctional skills b.) different from functional skills c.) exclude functional skills or d.) include functional skills. this is tricky for me but i'm guessing d.) include funtional skills. Does this sound...

**geometry**

If the measure of ÐDAB = 50°, and ÐDAC = 20°, what is ÐCAB?

**Chemistry**

If you have 1.90 mol of H_2 , how many grams of NH_3 can be produced?

**Chemistry**

If you have 1.90 mol of H_2 , how many grams of NH_3 can be produced?

**Physics**

Ok so F=MA thanks, I do appreciate especially since I am going to 35th reunion and went back to school. Much harder than I remembered. Again thanks

**Physics**

Sorry just re-learning after 30+ years.I had part of it answered however, the 4th and 5th question info was pertaining to questions 3 and 4 so I had to ask the question from the beginning. My answer was T = 1.585 s. for speed I calc 0.942/1.585s=0.594...right? my real problem ...

**Physics**

A 0.500 kg particle moves in a circle of R=0.0150 m at constant speed. The time for 20 complete revolutions is 31.7 s. What is the period T of the motion? What is the speed of the particle? What is the centripetal acceleration of the particle? What is the centripetal force on ...

**chemistry**

the equilibrium constant of the decomposition of NOCL is 1.6*10^-5. calculatethe concentration of all species at equilibrium if initially 3.52 mol of NOCL is placed in a 5.00 L container

**Chemistry**

The triprotic acid H3A has ionization constants of Ka1 = 6.8× 10–3, Ka2 = 8.1× 10–9, and Ka3 = 5.0× 10–12. Calculate the following values for a 0.0760 M solution of NaH2A [H+] = ? [H2A-]/[H3A]= ? Calculate the following values for a 0.0760 M so...

**Chemistry**

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.100 M phosphoric acid solution. pKa1 = 2.16 pKa2 = 7.21 pKa3 = 12.32 [H3PO4] = ? [H2PO4-] = ? [HPO42-]...

**Chemistry**

What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.22?

**Chemistry**

A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?

**Chemistry**

This question has been bugging me for a long time. A rock contains a Pb-206 to U-238 mass ratio of .145 to 1.00. Assuming that it did not contain any Pb-206 at the beginning of its formation, determine its age. I assume from the other problems in my book that the 1/2 life is 4...

**chemistry**

However, when I try to find the rate constant I get 3.5. My book says 3.5^-.5. I don't know how they got this. .0069= (.010)^.5(.020)=approx 3.5 but the book says 3.5M^-1/2*s-1 Also I am wondering if there are three reactants in a problem, is there any difference how it is...

**chemistry**

I have a problem like this: CHCl3 + Cl2 = CCl4 +HCL This is the rate table: CHCL3 Cl2 Initial Rate .010 .010 .0035 .020 .010 .0069 .020 .020 .0098 .040 .040 .027 They want me to find the rate constant and the rate law.

**Math**

At a summer camp, one boy and one girl will be selected to lead the weekly activities. If there are 130 boys and 145 girls at the camp, how many different 2 person combinations of 1 boy and 1 girl are possible?

**Math**

On friday, a computer was priced at $800. on the following wednesday, the price was reduced by 15%. On the following friday, the price was further reduced by 20%. what percent of the original price was the final price ?

**Chemistry**

180

**english**

The reason your voice matters is because its part of the way you want to be respected, spoken to, as well as you are part of a family of individuals. The fact that you have ideas of your own and you have values and an opinion is also why your voice should be heard. You have ri...

**english**

The reason your voice matters is because its part of the way you want to be respected, spoken to, as well as you are part of a family of individuals. The fact that you have ideas of your own and you have values and an opinion is also why your voice should be heard. You have ri...

**geometry**

LPG is stored in highly insulated spherical vessels in most oil refineriesif.If the inside diameter of one of these tanks is 11.4ft, find it's volume. Report your answer to the nearest one-tenth of a gal. Use r=3.14 and 1 cubic ft=7.5gal

**geometry**

find the volume of an industrial tank in the form of a horizontal cylinder whose radius is 2.6 yd, and whose length is 8.4 yd. rr=3.14

**chemistry**

When compound A is heated with acid compound B forms. Ahas the formula C3H8O and B is C3H6. When Ais oxidized compound D forms that is further oxidized to carboxylic acid. What are compounds A, B, and C.

**chemistry**

What is the pH of a solution prepared by dissolving 1.533 g HCl in water to make 420 mL of solution

**biology**

Following the usual pathway of circulation blood flows from the __________ to ___________, to_____________and to__________

**biology**

The ___________ ____________ supplies blood from the heart to all organs except the lungs

**biology**

Terms like punctiform and round relate to colonial ____________while smooth and curled relate to colonial___________

**biology**

Traditional phylogenetic results have been challenged by the results of _________________

**pre-algebra**

the perimeter of a pool is 150m. the width is 1/2 its length. what are the dimensions of the pool

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