Wednesday
April 23, 2014

Posts by Craig


Total # Posts: 76

Chemistry
Methane reacts with water to form CO and H2 as follows: CH4(g)+H2O(g)=CO9g)+3H2(g) The value of Kp at 298 k for the reaction is 7.7 *10^24, calculate Kc. If you can please show the steps I would greatly appreciate it. Thank you

Math- urgent
8x-8-6x=20 2x=28 x=14

statistics
78

college math
How many different committees can be formed from 9 teachers and 39 students if the committee consists of 2 teachers and 3 students? In how many ways can the committee of 5 members be selected?

math
2x^4-11x^3-6x^2+64x+32=0

physics
How much friction force will be required if a car weighing 2100kg traveling at 28m/s rounds a curve of radius 59m banked at a 15 degree angle

physics
in the equation V=sqrt(r*g), what does sqrt stand for?

Math
3x-2y=0 x-y=-1

chemistry lab
Oh that's what it is? Thanks

chemistry lab
How does the presence of a common ion affect the solubility of a salt? Explain in terms of equilibrium.

Statistics
What spinner?

chemistry
thank great help! much appreciated

chemistry
Strong base is dissolved in 665 mL of 0.400 M weak acid (Ka = 3.69 × 10-5) to make a buffer with a pH of 3.94. Assume that the volume remains constant when the base is added. HA(aq) + OH-(aq) -> H2O(l) + A-(aq) Calculate the pKa value of the acid and determine the num...

geometry
a right triangle find the value with 71 5 find x n y answers

Geography
What political changes swept through Europe during the second half of the twentieth century?

MATH
the perimter of a rectangle is 20inches and its area is 16 square inches. Find the dimensions of the rectangle. I need help to set up the problem

ENGLISH
ok fine ,but thanks for the help

ENGLISH
He is right if romeo and juliet get married and the families might come together. The Friar does consent to marry Romeo and Juliet, hoping that the marriage might bring peace between the feuding families. Is this right so far.

Social Studies
Improve Not all early Americans were happy with the Constitution. Democratic-Republicans, also known as Anti-Federalists, opposed the Constitution because they feared the Federal Government would gain too much power... much like King George from whom they had just fled! They ...

ALGEBRA 1
The square of a number is equal to the sum of 21 and 4 times the number. Find the number

ALGEBRA 1
The height h is the time of seconds that the ball has been in the air with an initial vertical velocity of 48 feet per second from a height of 5 feet above the ground is given by the equation h=-16t^2 + 48t + 5 where t is the time in seconds that the ball has been in the air. ...

math
Im having a problem understanding this problem so I cant solve it. Bruce knows how many key are on his keyboard, but some dont work. How does Bruce find the number of keys that work? write to explain

Biology
Why does Beta Glucose chains have more weak bonds between the chains than there are between alpha glucose chains?

math
a rectangular pen is to be constructed alongside a barn using 120 feet of fencing. the barn will be used for one side of the pen. What should the dimensions of the pen be to maximize its area. ***Can not use calculus. This is a 9th grade question

algebra
Use the given conditions to write an equation for the line in point'slope form and slope-intercept form. Slope= -5, passing through (-9,-6) type the point-slope form ot the line Type the slope-intercept form of the line

Managerial Accounting
what management position is responsible for each variance: Sales Materials Labor Overhead General, Selling & Administrative What causes these variances?

Chemistry
A solution is prepared by dissolving 130 g of NaNO3 in 100 g of water at 80°C. The solution is cooled to 0°C. How many grams of compound remain in solution? How may grams of solid are formed?

math
What is 58 rounded to the greatest place value?

Math
The number is between 3 and 10, you can make exactly 3 arrays with this number and it's not 9. What is it?

Math (Calc 1)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle (as shown in the figure below). (pictures of a pentagon) If the cross-sectional area is A, determine the dimensions of the win...

Biotechnology
How would you make 450 mL of a 0.250 M NaOH solution?

chemistry
stop cheating

English
It

English
I believe in this sentence: It was the world’s first movie studio. the subject is: movie studio the predicate is: was Am I correct?

English
Thank you!

English
were?

English
The first movies were different from today’s films. What is the simple predicate

math
n=1/a-1/b solve for b please show all steps

maths.
the smallest number is 2

maths.
find the lcd of each setof fractions: 1/2, 1/8, 1/16

Math
If I bought an item for $80 on which there was a 30% markup, what is the formula to determine the pre-markup price?

economics
The smaller of the two factories will begin to see diminishing returns first. That is because they will have exhausted the capacity of the fixed factor of production(i.e. the factory) sooner. In other words, production will reach its maximum level because the factory only has ...

Marketing
A manufacturer of AC units realizes a cost of $55.00 for every unit produced. Its total fixed cost is $2,000,000. If the manufacturer produces 500,000 units, calculate its: a. unit cost b. markup price if it desires a 10% returns on sales c. ROI price if it desires a 25% retur...

Alge.
Graph the equation using the slope and the y-intercept. y=5/3x+2 I need to show the slope and y-intercept when I graph.

math
what is the unit rate for 250 miles in 5 hours

algebra
A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 120 ft. of fence? What should the dimensions of the garden be to give the farmer the max area? Can not use calculus

Math
Is there a difference between solving a system of equations by the algebraic method and the graphical method? Why or why not?

french
i have a pc with windows is the rest it of it ok though

french
can someone check my french essay on pocket money and improve where possible very much appreciated Je recois dix livres d'argent de poche par semaine de mes parents. Pour gagner mon argent de poche je dois aider mes parents a la maison et je dirais que j'aide un peu a ...

science
a snowball rolls off the edge of a horizontal roof at a velocity of 7 m/s. what is the speed of the snowball 3 s later?

physics
what is the angular speed of Earth around the Sun in radians per second

law
according to beccaria, the system can reduce the severity of punishment and it can also do what?

Math Statistics
thank you so much! i think i got it!

Math Statistics
would this be a binomial-like should i consider it applicable for study not applicable for study

Math Statistics
An investigational drug study is being conducted. The initial screening phase needs to include enough people so that the final (approved) group has at least 10 patients. The probability of a person being approved for the study is .80. what initial sample size is needed to make...

Statistics
An investigational drug study is being conducted. The initial screening phase needs to include enough people so that the final (approved) group has at least 10 patients. The probability of a person being approved for the study is .80. what initial sample size is needed to make...

10 rhyming words
Hey, here's over ten: rail, crale, pale, stale, ale, tail, tale, nail, mail, wale, hail, fail, sail, yale, jail, gal

Math
Matt has twice as many stickers as David. If David has d stickers, and Matt gives David 10 stickers, how many stickers does each have in terms of d?

Algebra
I'm trying to solve this equation for x. .6 = x / x + 20 I can tell that X=30, but how do I prove that mathematically? We can't just plug in numbers, we have to show where we got them from.

trigonometry
show that 1-cos^2t divided by sin^2t =TANt

trigonometry
1) show that: 1-cos2t divided by sin2t= TANt 2) show that: 1-(cos2t divided by (cos x cos)t)= (TAN x TAN)t

Calculus
i'm guessing that twice differentiable means y''

please help!!!
i really don't know how to start this problem

Calculus
sorry about that: when t=0, r't=5.7; t=2, r't=4; t=5, r't=2; t=7, r't=1.2; t=11, r't=.6; t=12, r't=.5

Calculus
t: 0 2 5 7 11 12 r'(t): 5.7 4.0 2.0 1.2 0.6 0.5 The volume of a spherical hot air balloon expands as the air inside the balloon is heated. The radius of the balloon in feet is modeled by a twice-differentiable function of r of time t, where t is measured in minutes. For 0&...

precalculus
1. .015*65*12+65=76.7 million 2. 4*65=260 million

Need help fast on calc
original curve: 2y^3+6(x^2)y-12x^2+6y=1 dy/dx=(4x-2xy)/(x^2+y^2+1) a) write an equation of each horizontal tangent line to the curve b) the line through the origin with the slope .1 is tangent to the curve at P. Find x and y of point P. -when plugging y as 2 in original, it do...

Math
How do you do a factor tree for 37?

8th grade
EACH STATEMENT DESCRIBES TWO WORDS THAT WHEN FUSED TOGETHER CREATE A NEW UNRELATED WORD. QUESTION: THIS IS AN ALLOTMENT OF DNA

math
Factoring. 6n^2 +24n -18 Answer: 6(n^2 +4n -3) y^3 -y^2 + 3y -3 Answer: (y-1)(y^2 +3)

Algebra 1
The upward velocity of the water in the stream of a particular fountain is given by the formula v = -32t + 28, where t is the number of secondds after the water leaves the fountain. While going upward, the water slows down until, at the top of the stream, the water has a veloc...

IT
high level languages need to be translated. what are two different types of translator? Thank you for using the Jiskha Homework Help Forum. By your question do you mean human vs. mechanical (machine or computer-assisted) translation?

color theory
give me the answer for my test please

the big idea of energy
OMG LOL i cant believe ur doin the ear defenders homework too!!!! i am completly stuck too but i do no that the best material for the outside is a nard shiny plastic!! hope that helps lol!!!

how to sketch a graph of..
y=x^2-1

Math
5x

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