Tuesday
July 22, 2014

Posts by Ben


Total # Posts: 647

math algegra
one type of probablity used practically daily is?

Math
how do you solve: 2A^2-7a-15

Mathematics
Thanks. i worked it out and it came out to = 4 liters

geography
what is china's culture? please give examplesa Thank you!

Chemistry
A sample of .234g of carbon is placed in a closed stainless steel bomb with .502g of of oxygen gas. The mixture is ignited giving of carbon dioxide. How many grams of carbon dioxide should be obtained upon combustion?

Finance
John borrowed $1,000 discounted at 10% for six months. How much did he receive when the loan was made? I get $952.38 by using the formula below: 1000=P(1+.10/2)^(.5*2) - am I doing this right?

Finance
Determine the amount of each payment to be made to a sinking fund in order that enough money will be available to pay off the following loan. $29,000 loan, money earns 12% compounded annually, 42 months. I tired doing this using the future value of an ordinary annuity formula,...

Math (repost)
In standard form, find the equation of the circle that passes through the origin and x-intercept 1 and y-intercept 2. (I fixed a correction a little too late after a response.) Help please? thanks!

Physics
Calculate the speed needed by a spacecraft to maintain a circular orbit at about 350 km above Earth’s surface. (it's a project where we create our own spaceship. let's say the craft is 500kg) --- Not sure about the formula to find this. All I know is that it may h...

Math
woah, oops. the y-intercept is 2.

algebra
You can work a total of no more than 34 hours per week at your two jobs. House cleaning pays $8 per hour and your sales job pays $6 per hour. You need to earn at least $245 per week to cover your expenses. Write a system of inequalities that shows the various numbers of hours ...

chemistyr
0.115

chemistyr
0.115

math/probability
the anwser is 4

Pre-algebra
nope,I'm not very good in math as well :(

Social Studies
What is the Socratic Method?

Pre-algebra
hi,are you good at World History?

Social Studies
Um excuse me,could you help me with this one problem I have?I don't understand it

science
Hi, quick question: Graphite is burned in oxygen to give carbon monoxide and carbon dioxide. If the product mixture is 33% CO and 67% CO2 by mass, what is the heat from the combustion of 1.00 g of graphite? dH values: CO:-110.5 kj/mol, CO2: -393.5 kj/mol Thanks!

Calculus
Use linear approximation, i.e. the tangent line, to approximate 8.4^(1/3) as follows: Let f(x)= x^(1/3) . The equation of the tangent line to f(x) at x=8 can be written in the form y=mx+c where m=1/12 and c=4/3: Using this, find our approximation for 8.4^(1/3).

AP Chem
This post helped immensely, thank you so much and merry Christmas!

science
which of earth's spheres extends into all others

Math
Use linear approximation, i.e. the tangent line, to approximate sqrt[3] { 8.4 } as follows: Let f(x) = sqrt[3] x. The equation of the tangent line to f(x) at x = 8 can be written as y=mx+c where m=1/12 b=4/3 find the approximation for sqrt[3] {8.4}

8th grade
Please Help Me. I'm doing a Science Fair Project, and I need help with finding simmilar experiments to mine. My experiment is: Which saliva is cleaner: Cat, Dog, or Human???

world history
why did the industrialized nations of the world embark so aggressively upon imperialist ventures between 1880 and 1914?

Physics (Rotational Kinetic Energy)
Hello, The question is: A solid ball rolls along the floor with a constant linear speed v. Find the fraction of its total kinetic energy that is in the form of rotational kinetic energy about the center of the ball. Krot/Ktotal = ? The answer I keep getting is 3/1, but the onl...

psychology
It also depends on the habituation of the stimulus. Rather than conditioned excitation, you would get conditioned inhibition here.

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?

french
YOU legs hurt?

English
free verse does not mean don't use needed punctuation or capitalization. As I searched for examples of free verse, I found many that didn't have punctuation (which caused ideas and thoughts to run together) and didn't have capitalization, which distracts from the m...

Biology
I am having trouble descibing how the expression of sex-linked genes is similar and different from the expression of autosomal genes?

economics
Suppose that the government decides to charge cola consumers an excise tax. Before the tax, the market is in equilibrium, where 12 million cases of cola are sold every month at a price of $3.50 per case. After the tax, 6 million cases of cola are sold every month; consumers pa...

math 8th grade
72/100=x/200 **cross mulitply: 100x=72*200 100x=14400 x=14400/100 x=144 ______ Or just multiply .72 by 200 .72*200=144

Physics (Normal Force)
When a book weighing 10 N is placed on a table, the table exerts a normal force of 10 N on the book. When a crate weighing 250 N is placed on the same table, the table exerts a normal force of 250 N on the crate. Explain the mechanism that allows the table to exert just the ri...

calculus
how do you solve e^(9ln2)

10th grade algebra
7x-15y+9=0 **Subtract 9 from both sides 7x-15y=-9 **Subtract 7x from both sides -15y=-7x-9 **Divide both sides by -15 y=(7/15)x+(9/15) <--- equation isolate for y

chemistry
12

biology
What do you think?

Math (Angle Calculation)
Would -75.74 degrees be the same as 284.26 degrees?

math
Could you tell me how exactly to graph piecewise functions.

pchem
Use R = 8.2 × 10–5 m3 atm/mol K and NA = 6.02 × 1023 mol–1. The approximate number of air molecules in a 1 m3 volume at room temperature (300 K) and atomospheric pressure is: 41 450 2.5 × 1025 2.7 × 1026 5.4 × 1026

Chemistry College (Need to know!)
How is this Possible GK. Everywhere I have looked, including mark schemes and chemistry websites dH(solution) is worked out via this equation: dH(solution) = dH(LE) - dH(hyd) + dH(hyd) What is it you are working out with solute and solvent?

Chemistry College (Need to know!)
Am I Correct in assuming this? dH of solution = -dH of lattice enthalpy + dH of hydration E.g: dHsolution NaCl = -dHLE NaCl(s) + dHhyd Na+(g) + dHhyd Cl-(g) Units as kJmol-1

Chemistry College
Am I Correct in assuming this? dH of solution = -dH of lattice enthalpy + dH of hydration E.g: ÄHsolution NaCl = -ÄHLE NaCl(s) + ÄHhyd Na+(g) + ÄHhyd Cl-(g) Units as kJmol-1

Chemistry College
Well to be honest I wasn't there for the teaching of this in my class due to University interviews. I was just wondering how you actually work through them as other websites i have been on have all been in too much (universty standard) detail. Thank you for the fast response!

Chemistry College
Is there a simple formula for the Enthalpy of solution and/or hydration?

english
hi what does this quote mean I am responsible. Although I may not be able to prevent the worst from happening, I am responsible for my attitude toward the inevitable misfortunes that darken life. Bad things do happen; how I respond to them defines my character and the quality ...

8th grade
its not beef flat retard.

us
hi i have to write a paper stating that malcolm x was a better leader than martin luther king jr. I need a lot of help

history
what other civil rights leaders could i really use

history
hi. I need to write a 5 page paper describing how Martin Luther King's leadership was not needed in the civil rights movement. I need a lot of help and information. Thank you soo soo much.

chemistry
i dont get part three at all please help

chemistry
suppose that you could decompose 0.250 mole of Ag2s into its elements a.How many moles of silver would you have? how many moles of sulfur would you have? b. how many moles of ag2s are there in 38.8 g of AG2S? how many moles of silver and sulfur would be produced from this amou...

chemistry
can u show me how to set it up because i dont get it at all

English
I'm confused. In the Great Gatsby, did Myrtle get killed in Chapter 8 or was that a flashback, or something that Nick just learned of at that time? Thank you

science
look

Historical Fiction
My teacher wants me to write a historical fiction story. We need a source from the internet with ".edu" at the end of the address. My paper is going to be on World War II, so could you find a website on World War II with ".edu" at the end?

Chemistry
2. Calculate the volume for the following object If you know that the object has a mass of 24 grams and the density is 12 g/ml. I tried to get rid of the 24 by multiplying it on both sides, and dividing on both sides, but neither worked. What will then? Thanks!

Jiskha in General
Are some of the people on this site teachers? How do they have time to answer our questions? Don't they have to grade papers and such? I'm just curious and grateful that some people are willing to always be on here.

chemistry
We have 1 mol of N2 gas that is heated at constant pressure from 300K to 5770K on the surface of the sun. i) Find H and S given that P for nitrogen is (25.7 + 0.0130T) J/mol-K. ii) Now, redo your calculation assuming that the second T-dependent term in the P ex...

4th grade
What is the correct way to write each of these Titles correctly? 1.highlights 2.child of fire 3.the downtown news 4.number the stars

MIST
SIN (X+Y) SIN (X-Y) = SIN ^2X - COS ^2Y

History
Hi. I need to find a lot of information on World War II. My teacher wants me to use only websites that have .edu at the end. Could you help me find a website?

math
sketch the graph of y^2=(1/4)x

physical science!!!!!!!!
1. Alex pulls on the handle of a claw hammer with a force of 15 N. If the hammer has a mechanical advantage of 5.2, how much force is exerted on a nail in the claw? 2. While rowing in a race, John pulls the handle of an oar 0.08 m on each stroke. If the oar has a mechanical ad...

physical science
Alex pulls on the handle of a claw hammer with a force of 15 N. If the hammer has a mechanical advantage of 5.2, how much force is exerted on a nail in the claw?

history
did native american colonize or immigrate?

calculus
It is known that if m <= f(x) <= M for a <= x <= b, then the following property of integrals is true. m(b-a) <= int_a^b f(x)dx <= M(b-a) Use this property to estimate the value of the given integral. ? <= int_0^3 3/(1+x^2)dx 2 <= ? solve for the ?

calculus
given: f(x) = 2-1/4 x Evaluate the Riemann sum for 2 ≤ x ≤ 4 , with six subintervals, taking the sample points to be left endpoints.

Chemistry
How can you separate compounds?

us history debate
i really don't know what to do. PLease please help me

us history debate
Hi. I am doing a debate on wheter united states imperialism in the late 1800s to early 1900s was justified. I am on the side that states that imperialism was justified. I need help coming up with points to put in my rebuttal. i already have my opening statemnt done but I don&#...

Algebra
Give the domain for each of the following: 5+2y/6 5-r/r 2y+1/y+5 I dont get these so yea thank you!

Recent History
I don't understand what the big deal was about Y2K. Why would the world stop just because the computers would...I mean we existed all of these years without computers. It would make life more difficult certainly, but it wouldn't entirely end life as we know it.

Math
How do you compute 10 (to the -4)(as the exponent)

philosophy
Why do the Skeptics treat lack of belief as the goal of life? what purposes does that serve for them?

physics
bjkhkh

calculus
Find an equation of the tangent line to the curve at the point (0, 1). y = (1 + 3x)20 i got y' = 60(3x+1)^19 what do i do next?

calculus
differentiate y=x sin((4)/x)

eng
how would i deal with this? Each generation has some thing valuable to offer This generation information dispersal, my generation-heavy metal my parents--they paved the way

English
teacher

English
no kidding that's the way they want it for the outline. They also want us to show our stylistic devices in the outline. Just a weird way of learning it.

eng
Outline: 4) Also the Government will not incur the cost of defaulted student loans. a. High debt loads are not being paid (Stat) 800 million overdue on defaulted loans b. Relief programs are faulty (Fact) Debt management programs require loans to be in good standing (not in de...

eng
hows my outline look? Outline: 1)Post secondary education is unaffordable A)Poor students can’t afford tuition (Stat) tuition has increased by Fifty-percent B) The Government has implemented grants, scholarships and student loans to help. Thesis: I’m going to write a...

calculus
Show that the curve given below has no tangent line with slope m1, where: y = 4 x^3 + 8 x - 6 m1 = 7

calculus
find the points on the curve y=2x^3+3x^2-12x+1 where tangent is horizontal.

chemistry
write the total and net ionic equation for calcium hydroxide(aq) -> acetic acid(aq)

chemistry
How many total moles of ions are released when each of the following samples dissolves completely in water? 30.2g of Ba(OH)2 8H2O

Chemistry
is KAl(SO4)2 12H2O hygroscopic, deliquescent, or efflorescent?

english
Ok, having some troubles the question is why does soccer inspire so much passion around the world probably because it provides a unifying identity. Gives the poor something to aspire to, provides role models, and unities them for a common purpose. do i have to much ?

Calculus derivatives
f(a) = a + √a (a) Find the derivative of the function using the definition of derivative.

chemistry
calculate the number of Mg2+ ions in each mL of 0.162M(molarity) magnesium bromide

evaluate my english pls
Analysis of “A Hanging” George Orwell’s “A Hanging” shows the inhumanity of capital punishment. He uses a narration to describe the sequence of events involved in the hanging of an Indian prisoner. By using vivid images the horrors are shown. Overall t...

evaluate my english pls
i copied and paste it..but doesnt seem to work

evaluate my english pls
Analysis of “A Hanging” George Orwell’s “A Hanging” shows the inhumanity of capital punishment. He uses a narration to describe the sequence of events involved in the hanging of an Indian prisoner. By using vivid images the horrors are shown. Overall t...

english
thanks ms. sue im finally getting that stuff... its been 20 yrs since i did grammar..

english
one says each boy so i assume its singular...so the very has to be his 2-I I are going to the store jane and i are going to the store not sure what is singular and plural and subject , object, and all that stuff.

english
1. their 2 me 3 we 4 me and bob 5 who

english
hey can u help me with punctuations are these correct> having problems with pronoun agreement. My answer are the end of each sentence. 1. Each of the boys washed (their his) dishes. His 2. Jane and (me I) are going to the store, Mom! Me 3. (We Us) and our friends signed yea...

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