# Posts by lena

Total # Posts: 1,041

**math**

So 3 digit integers would be from 100 to 999. Let's break it up: 1) 100-109 you know that there are 5 #s are odd (101,103,105,107,109) and of those #s 101 is not distinct therefore their are only 4 distinct odd #s 2) 110-119 you know that none of the #s are distinct (all ...

*March 12, 2013*

**algebra!**

There is probably an easier way to go about doing this but I can't seem to think of it at the moment so you'll have to suffice with this until someone else can answer: I came up with this formula: a x b + 7 = 2027 where a is the the divisor and b is the quotient and 7 ...

*March 11, 2013*

**simple geometry**

I answered this below; refer to your previous question!

*March 11, 2013*

**geometry!**

Assuming the swimming pole is a rectangular prism wouldn't you simply do the following: V = length x width x depth V = 20 x 8 x 3 V = 480 m^3 of water

*March 11, 2013*

**algebra!!!**

I'm not Ms. Sue but I could try to help. Let's create a formula: Let A denote the # of adult tickets Let C denote the # of child tickets Therefore... $13 x A + $11 x C = $179 13A + 11C = 179 So from this point forward, I would ask the following. What # must you ...

*March 11, 2013*

**geometry**

OK. So there are 33 multiples of 3 that are < or = 100. 3,6,9,12,15,18,21,24,27,30,33, 36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99 ect. There are 20 multiples of 5 that are < or = 100. 5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100 The ...

*March 11, 2013*

**geometry**

Sure; post it and I'll give it a go.

*March 11, 2013*

**geometry**

What exactly is the question asking? It would make sense if they were asking the greatest distance between 2 points but asking what shortest distance between 2 points does not make sense. Perhaps I'm not understanding the question properly. If you could expand on what the ...

*March 11, 2013*

**geometry**

Is there a figure that you were given? This question does not make much sense to me.

*March 11, 2013*

**Geometry**

If you can imagine it, the figure will look like a right angle triangle. The hypotenuse will the 20 feet. The base will be 7 feet. The height is the unknown. a^2 + b^2 = c^2 7^2 + b^2 = 20^2 Solve for 'b' and you will get the height of the wall where the ladder reaches.

*March 11, 2013*

**Geometry**

This question has already been answered below. Refer to your previous post!

*March 11, 2013*

**Fluid Imbalances**

The only thing I could really conclude was that perhaps if there is an increase in H+ in the blood then then in order to compensate, K+ might move out of the cells and into the plasma in order to compensate and the H+ would move into the cells? Also acidosis may result in ...

*March 3, 2013*

**Fluid Imbalances**

Why would a person who's blood gasses indicate metabolic acidosis be at risk for hyperkalemia?

*March 3, 2013*

**english**

I would say that summaries save time. They allow the reader to get a gist of what the paper is about without reading the whole thing. They usually outline key themes and characters. Summaries are usually designed to help the reader quickly understand the purpose of the paper/...

*March 2, 2013*

**Health**

I quite certain it is option D. The Affordable Care Act allows some preventative services under an insurance plan/policy and one of those services is diet counselling for people at high risk for chronic diseases.

*March 2, 2013*

**math**

Sub in 44 for n. 75-44+6

*February 25, 2013*

**math**

Did you write out the full question? It seems incomplete.

*February 25, 2013*

**Math Perimeter**

Not entirely sure what this question is asking but if it's asking you to draw any shape with a perimeter of 22 units then essentially you just need to make sure that all the sides of your shape add up to 22. For example. Suppose you wanted to make a rectangle. You could ...

*February 25, 2013*

**math**

Yes. You did this correctly. 2 4/5 as an improper fraction is 14/5.

*February 25, 2013*

**math**

Well let's figure out how many square metres the yard is in order to figure out how many cups of grass seed he will need. A = L x W A = 6 x 7 A = 42 squares metres So the question tells us for every 1 square metre, Elbert uses 1 cup of grass seed. If he has 42 squared ...

*February 25, 2013*

**Math (Simplifying Expressions)**

Let's use BEDMAS (brackets, exponents, division, multiplication, addition, subtraction) 48 ÷ 4 x 5 - 2 x 5 (Since there are no brackets or exponents, let's divide) = 12 x 5 - 2 x 5 (Since there is no more division, let's multiply) = 60-10 (Last thing left to...

*February 25, 2013*

**Algebra**

Now you've got me stumped. I don't understand why it would be option B :/

*February 25, 2013*

**Algebra**

So the area of a triangle is the following: A =( B x H) / 2 Let's plug in what we've been told in the question 24 = (3B x B) / 2 48 = 3B x B 48 = 3B^2 16 = B^2 + or - 4 = B I would go with option C because if you plug in 4 in or -4 for B into the area of a triangle ...

*February 25, 2013*

**Algebra**

You've got me stumped on this one too. I hope you understand why it's option B because I have no idea.

*February 25, 2013*

**Algebra**

I would also go with C because: (-12x)(-12x) = 144x^2 (12x)(12x) = 144x^2

*February 25, 2013*

**math**

Chance of not getting heads: 1) Toss # 1: 1/2 2) Toss # 2: 1/2 3) Toss # 3: 1/2 1/2 * 1/2 * 1/2 = 1/8 So I think the probability would be 1/8.

*February 25, 2013*

**Math**

Formula for area of a triangle is: A = (B x H) / 2 A = (14 x 5.5) / 2 A = ? cm^2 Plug it into a calculator and do the math.

*February 25, 2013*

**math**

15x^2 + 100x + 125 First I would factor out a 5 because I know 5 can go into 15, 100 and 125. 5 (3x^2 + 20x + 25) Now I would factor what is in the brackets. I used the quadratic equation and got the following solutions for x: x= -5 or x= -5/3 Therefore, the final factored ...

*February 25, 2013*

**math**

Times refer to multiplication so whats is 45 multiplied by 2? Can you answer that?

*February 25, 2013*

**math**

So Jay ate 2/15 of 5/8. 'Of' in math refers to multiplication so i think you would simply do the following: 2/15 * 5/8 = 10/120 = 1/12 I'm not 100% sure if I did this correctly. I think someone should verify this.

*February 25, 2013*

**math**

2x = 368 - 4 2x = 364 2x/2 = 364/2 x = 182

*February 25, 2013*

**math**

I think you are correct.

*February 25, 2013*

**English - The Lovely Bones**

I asked this question yesterday but no one has answered thus far so I thought I'd try asking again: If anyone has read The Lovely Bones novel could you please explain 2 things to me. 1) Is Ruth Connors able to see the dead? When she moves to NYC she writes about all the ...

*February 25, 2013*

**math**

Refer to question you posted just before this one. It is very similar and I think you'll be able to complete this one if you refer to the other question for reference. If you still don't understand, let me know and I'll try to get it started for you.

*February 25, 2013*

**math**

I'm going to have you do this question but I'll get you started. What do we already know? Total amount of fencing = 62 feet Width = unknown so let's refer to it by the variable W Length = 2W + 4 (they told us in the question that the length is 2 times the width ...

*February 25, 2013*

**math**

Again, you are going to be using the perimeter formula. The question tells you that the border is 192 inches which means that the total perimeter of this bulletin board is 192 inches. Since it is a bulletin board, I am going to assume that the shape is a rectangle. What do we ...

*February 25, 2013*

**math**

Let's think about this. Fencing goes around the field which means you are essentially trying to figure out the perimeter of the field. What is the formula for perimeter? Perimeter = Length + Width + Length + Width Now plug in your #s and solve.

*February 25, 2013*

**math**

I think you're wanting to put this into the form of y=mx + b. -4x+3y =-7 3y= -7 +4x y = 4/3x - 7/3

*February 25, 2013*

**math**

What are you trying to solve for? You have 2 unknowns.

*February 25, 2013*

**Math**

I'm assuming by function form you mean the form of y=mx + b. 2y + 5x = 12 So if we want to put this into function form, we want to isolate y. 2y + 5x = 12 2y + 5x - 5x = 12 2y = 12 - 5x y = -5/2x + 6

*February 25, 2013*

**Math!!**

your*

*February 24, 2013*

**Math!!**

You already asked this questions before and NO ONE is going to answer it for you unless you show you're own thinking. This is a forum designed to help you with your problems. It is NOT a forum designed to have people complete your homework for you!

*February 24, 2013*

**Math**

No problem :)

*February 24, 2013*

**Math**

1 Bag = 4 Gifts Total # of party bags = 8 Total # of part bags + Denis = 9 So originally the # of gifts without Denis would have the following equation: 8 x 4 = 32 Now that Denis is coming we have 9 party bags: 9 x 4 = 36 OR (8 x 4) + 4 = 36 So you see that the mistake is ...

*February 24, 2013*

**Algebra II**

Essentially we've created a quadratic equation and we're solving it using factoring. If you don't understand how I solved this question, I can expand on my thinking. Let me know if it makes sense.

*February 24, 2013*

**Algebra II**

Total # of seats = 900 # of rows = R # of seats = S So according to the question, if we have R rows then we have R+11 seats Total # of seats = # of rows * # of seats/row 900 = R * (R+11) 900 = R^2 + 11R 0 = R^2 + 11R -900 0 = (R+36)(R-25) Therefore, you must have 25 rows with ...

*February 24, 2013*

**The Lovely Bones**

If anyone has read this novel could you please explain 2 things to me. 1) Is Ruth Connors able to see the dead? Like when she moves to NYC she writes about all the murdered women she finds. How does she go about doing that? Can see she Susie too? 2) How is Buckley able to see ...

*February 24, 2013*

**MATHS -SALES TAX -plse URGENT-**

There are 3 things we must figure out in the this question. 1) What is the full price of this item + tax 2) What is the full price of this item 3) What is the price of this item with the 15% discount 4) Shopkeeper profit For this whole problem let us assume that 'x' is...

*February 24, 2013*

**Gen Math**

Let me just correct the 2nd line I posted: "In the question we have been told that 'twice the # of boys' = 'twice the # of boys - 63' girls. " That is wrong. I meant to say: "The # of girls = twice the # of boys-63"

*February 24, 2013*

**Gen Math**

For this problem let us assume that 'B' represents # of boys and 'G' represents # of girls In the question we have been told that 'twice the # of boys' = 'twice the # of boys - 63' girls. Total # of students = B + G 228= B + (2B-63) 228 = B + 2B...

*February 24, 2013*

**math**

So 4 names went into the bowl. If Sam is the first person selecting then the chances of him pulling out his name are 1/4. 1/4 as a percent is 25%. The second person selecting, Pam, now only has 3 names left in the bowl. Therefore, the chances that Pam will select Sam are now 1...

*February 22, 2013*

**Patho - Hyperkalemia and Heart Attacks**

Could someone please explain why an increase in potassium would cause a decrease in HR? I need someone to really dumb it down for me so I can fully understand. i was thinking that more Ka+ would increase the HR but in my lesson, it said it would slow down HR. I don't ...

*February 22, 2013*

**Math**

Did you type this question properly? Should it be tan(something) :/ Did you mean tan^-1(x)?

*February 22, 2013*

**Lang. Arts**

I would also go with C. Option A seems wrong because the hard wind from the sea is actually quite dangerous and not at all comedic. Option B seems wrong because they seem to be at the harbour not at the market. The farmer's are coming from the open-ait market but we are in...

*February 21, 2013*

**Lang. Arts**

"Non-restrictive" means basically that the phrase or clause is not necessary to the meaning of the sentence. Therefore, I would go with option A.

*February 21, 2013*

**Math**

Let's make a math sentence about how much the car company charges. Flat Rate: $120 per week = $120 * W Additional Fees: $0.12 per mile = $0.12 * M Charge = Flat Rate + Additional Fees Now let's plug in what we know: $162 = $120(W) + $0.12(M) Here's where I run into...

*February 21, 2013*

**math**

What kind of shape is this? It's hard to help when we don't know what the figure looks like.

*February 14, 2013*

**math**

OK. So let's create a formula of some sort. So what do we know? - When we remove 15 L from 2/3 filled drum, we have only 3/5 of the drum full Let's change this to a mathematical sentence. Let's say that whole drum holds 'x' Litres So we can say the ...

*February 13, 2013*

**math**

This question is very similar to the one I helped you with above. You should take a look at that on for reference. If you still don't understand, let me know and I'll help you out.

*February 13, 2013*

**Math**

I think it would be best to draw a diagram for this sort of question. So John walks 20 km East. START ----------------> JOHN (@ 20km EAST) - So John is facing this direction --> - If you were to turn 270 degree facing --> then you would be facing downwards or South - ...

*February 13, 2013*

**English - APA**

I found (author's last name, year, page #) Thank you very much for sharing that resource!

*February 13, 2013*

**English - APA**

I'm writing a book review in APA and I need to cite a quote. Would it be similar to an essay where I would do the following: (Author's last name, date of publication, page number) (Brown, 1999, p. 75) Do I need to include chapters, as well? The novel I'm doing is ...

*February 13, 2013*

**Biochemistry**

that are all the information given

*February 11, 2013*

**Biochemistry**

The Go’ value for the hydrolysis of glucose-6-phosphate is -13.8 kJ/mol. Assuming a concentration of 4 mM for this molecule, what would the phosphate concentration be at equilibrium (G = 0). Remember to convert kJ to J.

*February 11, 2013*

**stat**

if the heights of men follow a normal distribution, and 99.7% fall between 5" and 7" what is the estimate standard deviation of the height?

*February 2, 2013*

**chemistry help plz**

OH-OH-benzene ring-CH=CH-NH2 is anyone knows the name of this compound?

*January 14, 2013*

**Principles of Finance**

Since M1 = currency + demand deposits + traveler's check + other checkable deposits therefore as er the information given in the question, M1 = 700+ 300 + 10 + 300 = $1410 billion.

*January 13, 2013*

**Chemistry**

ANKUR answer is D

*January 11, 2013*

**chemistry**

thanks a lotttttttt

*January 11, 2013*

**chemistry**

a) sp3d2 b)Slightly less than 90∘ 4.13346*10^-7

*January 11, 2013*

**chemistry**

(a) What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 ∘C.

*January 11, 2013*

**Chemistry**

no 111

*January 11, 2013*

**Chemistry**

OOOOO SORRY B AND E

*January 11, 2013*

**Chemistry**

not right

*January 11, 2013*

**Chemistry**

something wrong ..

*January 11, 2013*

**Chemistry**

what about a?

*January 11, 2013*

**CHEMISTRY**

(c) Calculate the degree of polymerization n of polystyrene with a molecular weight of 3.091×106 g/mol.

*January 5, 2013*

**chemistry**

(c) What is the value of the degree of polymerization n of isotactic PB with a molecular weight of 3.091×105 g/mol?

*January 5, 2013*

**chemistry help plz**

what are the values of a,b,c and d in the balanced chemical equation aFe^2+(aq)+bAl(s)=cFe(s)+dAl^3+(aq) where a,b,c and d are the lowest possible whole numbers? a= b= c= d=

*January 4, 2013*

**chemistry**

(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.

*December 14, 2012*

**chemistry**

Show that a conventional x-ray generator is incapable of generating x-rays of wavelength as low as 10-11m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such x-rays.

*December 14, 2012*

**chemistry**

A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.35 kg m-3. Under these conditions the total surface area of the balloon is 0.57 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1. Calculate the rate of ...

*December 14, 2012*

**Chemistry**

2 and 4

*December 14, 2012*

**chemistry**

Methane (CH4) burns in oxygen to produce carbon dioxide and water vapor. The balanced equation is: CH4 + 2 O2 -> CO2 + 2 H2O What volume of carbon dioxide is produced when 3.2 L of oxygen are consumed?

*December 5, 2012*

**chemisy**

Methane (CH4) burns in oxygen to produce carbon dioxide and water vapor. The balanced equation is: CH4 + 2 O2 -> CO2 + 2 H2O What volume of carbon dioxide is produced when 3.2 L of oxygen are consumed?

*December 5, 2012*

**Determination of ASA Content of Tablets Lab Report**

Not asking for answers necesarily but I would to know how to approach each question Mass of pure acetylsalicylic acid (ASA) : .508 g Dilution Absorbance (a.u.) 2:11 .116 4:11 .259 6:11 .392 8:11 .502 10:11 .548 Mass of tablet : .380 g Absorbance read on the Spec 20 : .314 a.u...

*December 5, 2012*

**Math**

John's Collection: 10 coins in all 2 fewer quarters than dimes 2 quarters Q = D = N =

*November 12, 2012*

**Match**

John's Collection: 10 coins in all 2 fewer quarters than dimes 2 quarters Q = D = N =

*November 12, 2012*

**Chem**

Thanks!

*November 1, 2012*

**Chem**

What pressure (atm) is needed to confine an ideal gas to 68.0 L after it has expanded from 44.0 L and 2.3 atm at constant temperature?

*November 1, 2012*

**CHEM**

Silicon carbide, commonly known as carborundum, is a very hard and abrasive substance. The compound is prepared by heating silicon dioxide in the presence of graphitic carbon: SiO2(s) + 2C(s) --> SiC(s) + CO2(g) How many grams of silicon carbide can be formed from 55.0 g of...

*October 18, 2012*

**CHEMISTRY**

What element is represented by this electron ground state configuration : [Kr] 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d2 7s2 Is this really Krypton?

*October 18, 2012*

**CHEMISTRY**

What element is represented by this electron ground state configuration : [Kr] 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d2 7s2 Is this really Krypton?

*October 18, 2012*

**CHEM**

Arrange the following in order of increasing atomic radii from smallest to largest. Mg Ra Sr Be Ca Ba

*October 18, 2012*

**Chem help**

Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1. A. What is the symbol for this element? B. What is the atomic number of this element? C. How many unpaired electrons does an atom of this elelemt have? D. How many valence ...

*October 17, 2012*

**Chem**

Balance the following chemical equation (put the coefficients in order) Fe + O2 + H2O → Fe(OH)

*October 10, 2012*

**literature**

is a right

*July 22, 2012*

**Math**

Use the method of substitution to solve the linear equation! 6a=6-b 6a=5-b please help I don't get it it needs to be an ordered pair.

*June 26, 2012*

**Chemistry**

in the presence of NH3, Cu+2 forms the complex ion [Cu(NH3)4]+2. If the equilibrium concentrations of Cu+2 and [Cu(NH3)4]+2 are 1.8x10^-17M and 1.0x10^-3M respectively, in a 1.5 M NH3 solution, calculate the value for the overall formation constant of [Cu(NH3)4]+2. Cu+2(aq)+ ...

*April 3, 2012*

**english**

No, because the verb should be past tense. The sentence is referring to Fredericksburg who is no longer in Comance territory.It is in the past that he is in Comanche territory. The sentence should be: Fredericksburg used to be in Comanche territory.

*April 2, 2012*