Saturday

May 30, 2015

May 30, 2015

Total # Posts: 849

**chemistry**

Waait, The answer should be a negative number because that just means that the concentration is TOO high! pH is the negative log of the hydrogen ion concentration. Recall that pH can be negative when the hydrogen ion concentration is very high. So, Since your [H+]= 6040 M -log...
*April 19, 2010*

**chemistry**

I have the same issuee The H^+ concentration is 3685 on my example, however when i enter -log[H+] I get a negative numbe which isn't the pH :(
*April 19, 2010*

**Statistics**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal. d. The graph of a ...
*April 19, 2010*

**Finance**

ROI & NPV: wireless order-tracking system I need to identify the ROI and NPV of the wireless order-tracking system. Here is the information I have been given: - The acquisition cost is $35,000 paid at the time of installation. - It reduces the wait staff by one person: Figure...
*April 11, 2010*

**college**

3^5x + 13 = 1/9
*April 10, 2010*

**math- Algebra 2**

243^0.2x= 81x+5 how do i solve
*April 9, 2010*

**Bus Law 201**

Gavin, an 18 year old sudent was eating lunch on the grounds of a school. He threw a half- eaten apple toward the outside wall of a classroom some distance way. The apple sailed through a slowly closing door and struck a teacher who was in the room. The teacher was knocked to ...
*April 6, 2010*

**Physics**

A rock is dropped of the side of a bridge and hits the water below 4s later. a. What was the rock’s velocity when it hit the water? b. What was the rock’s average velocity as it fell? c. What is the height of the bridge above the water?
*April 6, 2010*

**calculus**

What is the polar form of (3^1/2 - i)? I know r=(x^2+y^2)^1/2 and theta = arctan (y/x) I know r=2, but how do you find theta?
*April 6, 2010*

**math substitution method**

m-3n=8
*March 28, 2010*

**Pre-Cal**

solve the problem: f(x) = -5x+2 and g(x) = 8x^2+9x+7
*March 25, 2010*

**college**

solve each equation 1/5y2-2=-3y
*March 24, 2010*

**Calculus**

What's the integral of e^(1+i)x dx? Please provide the full solution because I don't understand how to do this question at all.
*March 6, 2010*

**chemistry**

When silver nitrate reacts with hydrochloric acid, what type of reaction takes place
*March 5, 2010*

**Computer Information Systems**

how can you distinguish between computer electrical switches and meaningful information
*February 25, 2010*

**Math-Please Check Work!**

Find the image of P(5,-3)under each of the given transformations: 1. r x-axis(5,-3)? 2. Rorigin (-5,3)? 3. R90 (3,5)? 4.T 0,3 (5,0)? 5.r x-axis o T2,2 (7,1)? 6. r x-axis o r y=x (-3,-5)? 7. r y=x o r x-axis (3,5)? 8. R(2,2) o T5,-3 (12,-4)? Thank you!
*February 22, 2010*

**Math**

pls help! The cost to the chicago tribune for sunday home delivery is approximately $0.53 per newspaper with fixed costs of $1,070,00.Write an equation that relates the cost C and X of copies delievered.
*February 18, 2010*

**Chemistry **

no i didn not. but thank you!
*February 16, 2010*

**Chemistry **

How much heat (in kilojoules) is released on reaction of 4.10 g of Al? Reaction: 2Al(s) + 3Cl2(g)--->2AlCl3(s) Delta H= -1408.4 KJ
*February 16, 2010*

**Chemistry (creativity)**

Hey everyone. Well the part I need help in isn't exactly the chemistry part. My assignment was to research an element, and at the end, come up with some creative picture/cartoon. The problem is... I'm not exactly the creative type. My element was Mercury, any ideas? ...
*February 15, 2010*

**English**

"it"?
*February 15, 2010*

**chemistry**

Calculate the volume (mL) of the solute (CH3)2CO and the volume (L) of the solvent H2O that should be added to prepare 1.36 kg of a solution that is 25.7 g (CH3)2CO per 100. g solution. Molar Mass (g/mol) (CH3)2CO 58.05 H2O 18.015 Density (g/mL): (CH3)2CO 0.7899 H2O 0.9982 ...
*February 14, 2010*

**FlunkyJunkie**

Calculate the volume (mL) of the solute (CH3)2CO and the volume (L) of the solvent H2O that should be added to prepare 1.36 kg of a solution that is 25.7 g (CH3)2CO per 100. g solution. Molar Mass (g/mol) (CH3)2CO 58.05 H2O 18.015 Density (g/mL): (CH3)2CO 0.7899 H2O 0.9982 ...
*February 14, 2010*

**Chemistry**

Calculate the volume (L) of the solute C4H8O and the volume (mL) of the solvent C2H5OH that should be combined to prepare 5.54 kg of a solution that is 0.608 m. Molar Mass (g/mol) C4H8O 72.12 C2H5OH 46.07 Density (kg/L): C4H8O 0.8892 C2H5OH 0.7893 Name/Formula: tetrahydrofuran...
*February 14, 2010*

**4th grade**

you have a greater chance with box B. (Red marbles/total marbles in box) box A: 3 red marbles/5 marbles box B: 2 red marbles/3 marbles
*February 14, 2010*

**Math**

Can someone help me please, I am having a hard time understanding these three problems Clustering: 133 + 98 + 121 + 92 + 96 Substitute compatible numbers: 134 x 19 Front-end estimation with adjustment: 2,152 + 8,376
*February 11, 2010*

**english**

i have to write an essay on personal perspectives on the healthcare system i dont know how to start please help
*February 1, 2010*

**Math**

Experience shows that a ski lodge will be full ( 156 guests) if there is a heavy snow fall in December, while only partially full ( 57 guests) with a light snow fall. What is the expected number of guests if the probability for a heavy snow fall is .40? If someone could please...
*January 18, 2010*

**math**

b that is so easy
*January 14, 2010*

**geometry**

a 10-inch-long board is cut into two pieces that have lengths in the ratio 2:7. What is the length of each new piece?
*January 6, 2010*

**5th grade MATH**

if 2 is n then you put 2 in the place of n and change the equation to this 3(2)+2=? or 3x2+2=? your answer is then 8
*January 6, 2010*

**5th grade**

I am a 3-digit number divisible by three my tens digit is three times as great as my hundreds digit and the sum of my digits is 15 if you reverse my digits i am divisible by 6 as well as by three
*January 5, 2010*

**5th grade**

three..? i think atleast thats what i put on my home work sheet like that??..pretty sure im right!!!!?
*January 4, 2010*

**disease**

THANK YOU SOOO MUCH!
*January 3, 2010*

**disease**

HELP What are the top ten plagues in history?
*January 3, 2010*

**6th grade**

Divide the denominator into the numerator.
*January 2, 2010*

**Geometry**

Find the number of degrees in the point angle of each figure. Explain. {9/3}
*December 11, 2009*

**Geometry**

Why is it impossible for a regular polygon with more than six sides to tessellate the plane?
*December 11, 2009*

**calculus**

find the derivative of f(x)=cot(3x)csc^2(3x)
*December 8, 2009*

**Math**

How do you write Rotation, Translation, and Rotational Symmetry in math. For example, reflection is written : a reflection in line l is indicated by ML.
*December 8, 2009*

**Health**

Trace the path of food from ingestion to defecation. Briefly describe what happens at each stop on the journey.
*December 6, 2009*

**calc**

A manufacturer of aluminum cans has budgeted 20ð square centimeters of material for each can. What is the maximum volume that such a can could hold?
*December 6, 2009*

**Brooke High School**

Two dice are rolled. What are the odds in favor of a sum less than 5?
*December 5, 2009*

**Brooke High School**

Two dice are rolled. What are the odds in favor of a sum less than 5?
*December 5, 2009*

**calc**

differentiate y=3^xlnx
*December 2, 2009*

**calc**

f(x)= x^2 / (x-2)^2 find the intervals of concavity and the inflections points
*December 1, 2009*

**calculus**

find all the numbers c that satisfy the conclusion of rolle's theorem.... f(x)= cos 2x on the interval [0,3]
*November 23, 2009*

**calc**

find the derivative of x-lnx
*November 22, 2009*

**calulus**

a particle is moving along the cure y=sqrt x. as the particle passes through the point (4,2), its x-coordinate increase at a rate of 3 cm/s. how fast is the distancefrom the particle to the origin changing at this instant?
*November 19, 2009*

**Science**

I think you should do something harder. But if you think that your idea will get you a good grade GO WITH IT!
*November 16, 2009*

**calc**

logarithmic differentiation of find derivative of y= square root of x^x
*November 15, 2009*

**calculus**

find the derivative of f(x)= ln ln ln x
*November 15, 2009*

**calculus**

derivative of y=ln x/x^2 can someone double check the answer 1-2lnx/x^3
*November 11, 2009*

**calculus**

derivative of f(y)=yln(1+e^y)
*November 11, 2009*

**calculus**

derivative of f(x)=arctan(x^2-x) is it the product rule or the chain rule?
*November 11, 2009*

**calculus**

find the derivative of y=sqrt of arctan x
*November 10, 2009*

**calculus**

find dy/dx of y^3-xy=-1
*November 7, 2009*

**algebra**

50 cents
*November 7, 2009*

**5TH GRADE SCIENCE**

where in nature could you find a source of the same energy as that provided by batteries?explain
*November 4, 2009*

**Statistics**

This is the remaining part of Jackie's question:randomly selected adults. Show the formula that you will use and then calculate the mean age. Answer: Formula: mean = Mean:
*October 22, 2009*

**Statistics**

The table below gives the ages and systolic blood pressure (measured in millimeters of mercury) of 9 randomly selected adults. Subject # 1 2 3 4 5 6 7 8 9 Age, x 41 44 48 51 54 56 60 64 68 Pressure, y 111 115 118 126 137 140 143 145 147 Part 1: Calculate the mean age of the 9 ...
*October 22, 2009*

**Physics**

The speed of a projectile when it reaches its maximum height is 0.46 times its speed when it is at half its maximum height. What is the initial projection angle of the projectile?
*October 18, 2009*

**american history**

How did the indian wars come to an end? And how was life for the Indians afterwards?
*October 15, 2009*

**american history**

How did the indian wars come to an end? And how was life for the Indians afterwards?
*October 15, 2009*

**4th Grade Math**

dont understand Arrays and an Expanded Algoithm
*October 12, 2009*

**human geography**

what is the diffrence between site and location
*October 11, 2009*

**Earth Science**

Why is the speed of Earth's rotation different at the equator than it is at the poles?
*October 7, 2009*

**physics**

Its either Acceleration, Speed or Velocity. Or all of them
*October 6, 2009*

**French**

Subject Pronouns: Je Tu Il, Elle, On Nous Vous Ils Elles English Translations: Je-I Tu-You(Singular) Il, Elle, On- He She One We or They(Or It) Nous- We Vous- You(Plural) Ils- Multiple Boys or Boys and Girls Elles-Multiple Girls Avoir-To Have Verb Congigation: Je- J'ai- I ...
*October 6, 2009*

**7th grade**

If you really can't get it I'll give you the answer, but please just try it, its really rather simple.... _______________________________________ The answer would be 12
*October 5, 2009*

**7th grade**

Well, you could do it over 100. .83=83/100
*October 4, 2009*

**Grade 8 Geography**

What are the 10 major lakes of the world? What are the 10 major rivers of the world.
*September 23, 2009*

**algebra 1**

Try to get common denominators on the left side and then cross multiply
*September 17, 2009*

**1st. grade**

what are some objects that show temperature?
*September 17, 2009*

**psychology**

sorry my school dosent give us any books or anything to learn this stuff from. but thanks for helping me (:
*September 16, 2009*

**psychology**

How have some psychologists incoprorated their interests in science, math, and sociology into their careers?
*September 16, 2009*

**math**

I had to find the GCF of 25 and 52 and my answer is 1... is that correct?
*September 9, 2009*

**Economics**

Consider a country that initially consumes 100 pairs of shoes per hour, all of which are imported. The price of shoes is $40 per pair before a ban on importing them is imposed. Use a graph to explain what happens to the price of shoes and the quantity of shoes consumed after a...
*September 9, 2009*

**AP physics**

Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A + B and (b) the vector difference A –...
*August 23, 2009*

**Logarithms**

1. Find the amount of time required for an investment to double at a rate of 12.3% if the interest is compounded continuously. MY ANSWER: 5.635 yrs 2. Solve e^(0.2x) < 21.2 by using natural logarithms. MY ANSWER: X<15.270 3. Convert log(base 5) 47 to a natural logarithm ...
*August 12, 2009*

**medical**

When should the patient be advised of the existence of computerized databases containing medical information?
*July 11, 2009*

**history**

how were american business and strategic intersts a cause of spanish american war? business- protection of sugar in cuba Strategic- base in hawaii does anyone know other examples of business/stratgic intersts?
*June 13, 2009*

**poem**

Does anyone think "war is kind" by stephen crane relates well to "the things they carried" such as the idea that tim obrien writes about how the sodiers were psychologically impacted and in fact war is not kind at all
*May 29, 2009*

**poem**

i want to focus on the theme about ways soldiers have coped with war, like time obrien wrote to cope with dead and when curt lemon died in the story, the soldiers sang lemon tree because it was the only way to deal with seeing so many dyng
*May 29, 2009*

**english-poem search**

can someone help me find a poem that relates to themes of "the things they carried" by tim obrien? ive tried looking but im not familiar with war poems.
*May 29, 2009*

**history**

New civil rights technique used in the 1960's to desegregate lunch counters and other public facilities in the south?
*May 28, 2009*

**history**

did the united states help in the berlin airlift in any way? FOr the cold war debate, i want to say that the ussr is to blame because they were the agressors and the united states was just trying to help people in need
*May 26, 2009*

**history**

I have to write a paper on why the soviets are to blame for the cold war (just the soviets-not anythings about why the us was to blame) and I keep reading about the yalta conference and that stalin refused to allow free elections in Eastern Europe.but i dont understand how it ...
*May 26, 2009*

**english**

are there any famous poems about how soldiers at war deal with death. I'm reading "the things they carried" and the book talks a lot about how the soldiers would shake hands with dead people, (as a sort of dark humor I guess to desensitize them in a way) or how ...
*May 25, 2009*

**chemistry**

is it possible to neutralize a strong acid with a weak base? I think you can but i dont know how you would? Explain please?
*May 25, 2009*

**chemistry-acids and bases**

determine how many mL's of a monohydroxic base with a pH of 9 is needed to neutralize 50 mL of a monoprotic acid with a pH of 2. I do not understand what to do. can someone please help?
*May 25, 2009*

**math**

$29.95
*May 7, 2009*

**Algebra 1**

How do I solve the following problem: -x/5 = 1/16 Thanks.
*April 27, 2009*

**Science**

Does Francium or Cesium have the greatest atomic radius? Thank you
*April 21, 2009*

**french**

Nicolas: Il a eu tort parce que Eudes est très fort et il aime bien donner des coups de poing sur les nez et ça n’a pas raté pour celui de Geoffroy. Quand il a vu le coup de : POING ! Djodjo s’est arrête de dire : Dingue-dingue-dingue! Esp&...
*March 31, 2009*

**french**

can someone help me translate? Djodjo: Dingue, espèce guignol, sale menteur, sauvage, mal élevé! Maîtresse: Mais ... mais George. Il ne faut pas dire des choses comme ça! Agnan: Vous avez vu, mademoiselle? Qu’est-ce que je vous disais? Ma...
*March 31, 2009*

**math**

is the tan of 0 : 0 and 180 degrees or just 0
*March 25, 2009*

**french**

oh merci beaucoup! It really makes sense now...i was wondering why he thought the colored pencils were "terrible" because i didnt know "terrible" meant a good thing...thank-you!
*March 11, 2009*

**math**

how do i solve? sin2ɵ = cos ɵ and sin2ɵsinɵ=cosɵ
*March 10, 2009*