Friday
August 22, 2014

Posts by Joe


Total # Posts: 2,046

Calculus
Find the absolute maximum and minimum values of f(x)=(x^2)(e^(-x/2)) on the interval [-1,6]
September 20, 2010

Maths
hoe can i derive this equation. s(v)=(4pi)^1/3(3v)^2/3 and please explain.
September 20, 2010

Physics
Block A of mass 4.0 kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650 N m. The other end of the spring is attached to a wall. The block is pushed toward the wall until the spring has been compressed a ...
September 19, 2010

Physics
Block A of mass 4.0 kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650 N m. The other end of the spring is attached to a wall. The block is pushed toward the wall until the spring has been compressed a ...
September 19, 2010

Math
On what interval(s) is the curve y=(2e^x)-(e^(-3x)) concave downward?
September 18, 2010

math
Can not be solved. You can simply it down more to get 3x+6=3x. If you move the 3x to the same side you get 6=0 which is false.
September 18, 2010

GPA?
Would taking extra classes online help raise my GPA to a 2.8?? (I'm a junior and i need it raised before the end of my senior year. I have a 1.27 Grade Point Average right now.)
September 18, 2010

algebra
The difference of a number and 7 is the same as 45 less the number. find the number
September 16, 2010

Europe
what role did the geography of Europe play in the development of and ways of life in these towns?
September 15, 2010

Earth Science
During the Dinosaur Ages, if there was a region with a mountain range, alluvial plain, and a shallow sea. Which place would it be the most likely for dinosaur fossils to be formed?
September 13, 2010

MATH
Suppose that you have a supply of a 25% solution of alcohol and a 75% solution of alcohol. How many quarts of each should be mixed to produce 100 quarts that is 30% alcohol?
September 11, 2010

Algebra
ok I have got the answer anyway...thanks for ur help in the other question
September 10, 2010

Algebra
yes thats correct...Can you see where i am making a mistake in this problem. 1-125x^3 I got answer of -(5x-1)(25x^2+5x+1) but it seems to be wrong
September 10, 2010

Algebra
Factor 4xy+28x+y+7
September 10, 2010

Algebra
never mind. I have fiugured out the answers
September 10, 2010

Algebra
Could someone please help me with those 2 problems...thanks a lot for any of your help Use an algebraic approach to solve the problem. Find three consecutive integers whose sum is 57. Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of ...
September 10, 2010

Algebra-Please Help!!
What is the solution of x-4 is less than 4 and x + 4 is greater than 7 Please show how you did it so I can look at it and learn how to do them in the future Thanks
September 7, 2010

Algebra
What is the solution of x-4 is less than 4 and x + 4 is greater than 7 Please show how you did it so I can look at it and learn how to do them in the future Thanks
September 7, 2010

Math
What is the solution of x-4 is less than 4 and x + 4 is greater than 7 Please show how you did it so I can look at it and learn how to do them in the future Thanks
September 7, 2010

Spanish
Thank you
September 7, 2010

Math
ostriches=9 feet tall Birds in aviary=birds belong to me ostrich=does not live on mince pies birds belong to me=9 feet tall cancel all that are in common: the ostriches, birds belong to me, and 9 feet tall. You are left with the conclusion: The birds in my aviary do not live ...
September 6, 2010

physics
Is this question answerable???????? please help fast
September 6, 2010

physics
A foam cube bounces to a height of 15cm when dropped from a height of 100cm. To what height will it bounce if dropped from a height of 2.5cm? How do
September 6, 2010

physics
A round ball bounces to 2m after being dropped from an undetermined height. To what height will it bounce if dropped from a height 2.5 times as high? (how do u even calculate this problem?). (or is it just a problem that cant be solved?)
September 6, 2010

physics
drwls- so the answer cannot be determined?
September 5, 2010

physics
A ball of mass 1.2kg and a volume of 35cm cubed is dropped from a height of 2m. Determine the height to which this ball will bounce.
September 5, 2010

calculus
Use the ratio test to determine whether the series is convergent or divergent. 1/2 + 2^2/2^2 + 3^2/2^3 + 4^2/2^4 + ...
September 4, 2010

Finance
I think not but why?
September 2, 2010

Finance
Saturated Meat Corporation preferred stock is currently selling for $22 per share. The preferred dividend is $2.50 per share. If Jennifer requires a return of 10% on the preferred stock, should she invest in this stock?
September 2, 2010

Buisness - Finance
Determine the value of a $500 Canadian Pacific Limited perpetual 8 percent debenture if the required rate of return is 14%:
September 2, 2010

tsu
can you help with this answer anyway?
September 2, 2010

10th grade Honors English
Well i want to know what my teacher is asking
September 1, 2010

10th grade Honors English
What is my English teacher asking? Here is the prompt. Life can be considered a series of stories. It is the narrative we tell and hear the create the life the we live. And it id through these narratives that messages are passes. "October Sky", "Celebration of ...
September 1, 2010

Physics
Engr joe
August 31, 2010

Math
.86/1
August 30, 2010

5th grade social studies
what times on a clock make an acute angle? Is it 2:006:40 1:30 12:50
August 29, 2010

arithmetic
a total of eight pills are on a table. all have the same color and size. however, one is poisonous and weighs a fraction more than the others. a balance scale may be used only two times to determine the heavier pill. seven of the pills must be eaten.
August 29, 2010

Chemistry
i had the same question
August 28, 2010

algebra 1
please explain to me how I work out problems such as "-2-3" to get the correct answer and show the same on a number line
August 26, 2010

math/chem
it is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g/metric ton. a metric ton is 1000kg. at this concentration, what mass of uranium is present in 1.0 mg of earth's crust?
August 23, 2010

economics
What is the opportunity cost (in dollars) to attend an hour-long econ lecture for A $160,000 per year corporate executive who works 2,000 hours per year?
August 22, 2010

summer reading
the time hackers
August 16, 2010

Chemistry
Which solution has the higher osmotic pressure, 2 M NaCl or 2 M CaCl2?
July 27, 2010

Chemistry
Which solution has a higher vapor pressure, 1 M NaCl or 1 M glucose(C6H12O6)?
July 27, 2010

accounting
Compute the total, price, and quantity variances for materials and labor. The following direct materials and direct labor data pertain to the operations of Batista Manufacturing Company for the month of August. Costs Quantities Actual labor rate $13 per hour Actual hours ...
July 27, 2010

accounting
E11-6 The following direct materials and direct labor data pertain to the operations of Batista Manufacturing Company for the month of August.
July 27, 2010

Physics
60.0MW
July 25, 2010

algebra
Thank you.. SO would it be (x-5)(x+5)
July 19, 2010

algebra
Please help me factor this by grouping. I am stuck. 7x^3-35x^2-6x+30
July 19, 2010

physics
The answer to question 3 is mass, but I don't know any more of them.
July 13, 2010

IDEA Act
Determine how IDEA 2004 affects diverse learners. I am having troube with this question. Can anyone help me?
July 10, 2010

algebra
Plot (0,3) on the crodinate axes.
July 5, 2010

chemistry
226.1 mm Hg
June 21, 2010

Bio
The answer is B?
June 21, 2010

Bio
The ultimate source of the energy in food ___________________ A)is ATP B)is the sun C)is producers D)is plants E)is consumers
June 21, 2010

math
assignment for an art class is to complete 4 projects from a list of 6. how many ways can this be done if the order soes not matter?
June 17, 2010

statistics
There are 120 possible samples of size n=3 which can be drawn from this population of 10 scores: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 Write each sample and calculate its mean
June 15, 2010

english
what is the sypmbol of freedom? is it the white dove? just want to know for my poster im doing
June 13, 2010

history
What were the international consequences of the stock market crash in 1929? How did world leaders respond to the global depression? with what results?
June 7, 2010

History
Thank you sooo much!!
June 5, 2010

History
What social factors contributed to American Imperialism? I have searched and searched and not found anything. If anyone can help me, even with a website I would be grateful. Thanks so much.
June 5, 2010

language
Instructions Using specific references from "In Memoriam" Lyric 56 and from "Tintern Abbey," contrast Tennyson's view of the relationship between man and nature with that of Wordsworth's, demonstrating a comprehensive understanding of the ...
June 2, 2010

language
Poetic diction is used to refer to the linguistic style, the vocabulary, and the metaphors used in the writing of poetry Right? So it wouldnt be that one etheir, So my choices are now between 3 atmosphere 5 none of these But how do i know if it is none of these?
June 2, 2010

Chemistry
If radon-222 has a half-life of 3.8 days, determine how long it takes for only 1/8 of a sample to remain.
June 1, 2010

Eth 125
iat
May 27, 2010

Spanish 3
I am using "por" correctly in this sentence?: Podré reunirme contigo la semana que viene porque por ese momento tendré más tiempo.
May 27, 2010

Macroeconomics
Suppose the economy has been experiencing zero inflation and five percent unemployment for several years. The government decides to lower the unemployment percentage by generating some inflation. You need to do the following: 1)create a graph showing what the short-run effects...
May 24, 2010

Geometry
Area reqd. = 4.3*4.3 - ¡Çr^2 where r = 2.15 m Area = 3.96214 sq m
May 24, 2010

Algebra
y = mx + c is a line with slope=m and a y-intercept of c. And hence the reqd. line: y= -2x/3 + 2 or 2x+3y=6 Ajit
May 23, 2010

accounting info. systems
The last step in the revenue cycle is cash collections. The accounts receivable department must know when customers pay their invoices, yet segregation of duty controls dictate that the collection and recording functions be kept separate from each other. What is a solution to ...
May 23, 2010

CALCULUS
This is actually a question from co-ordinate geometry. If (x1,y1), (x2,y2) and (x3,y3) are the vertices of a triangle then its area = (1/2))(x1(y2-y3)+x2(y3-y1)+x3(y1-y2)) The co-ordinates of the vertices aren't very clear in your Q but assuming that the three points are...
May 23, 2010

math
Vol. of cylinder = ¡Ç(r^2)h and vol. of hemi-sphere=(¡Çh^3)/12 and hence their ratio = 12(r/h)^2 where r, h are the radius & and the height of the cylinder
May 23, 2010

Math
For a can with both ends closed, Area reqd. = 2¡Çrh + 2¡Çr^2 where r=6,h=4 and assume ¡Ç=22/7, A=2640/7 sq in. If one end of the can is open then A=2¡Çrh + ¡Çr^2 = 264 sq in.
May 23, 2010

math
What is the greatest amount of postage you can not pay using only 7 and 11 cent stamps?
May 23, 2010

physical science
calculate the KE of a 1500 kg. car travelling at 60 km/h
May 19, 2010

physical science
What will the stopping distance be for a 1,000-kg car if -2,000 N of force are applied when the car is traveling 10 m/s?
May 19, 2010

chemistry
A metal pipeline is laid to carry oil 500 miles across desert.Temp @ night is 30 F: during day temp is 130 F? The linear coefficient of thermal expansion of metal is 0.000006, how much expansion and contraction along pipeline must the design engineer plan for.. a. 475 ft b. ...
May 18, 2010

chemistry
A). the process will still be first order, but the rate constant will decrease.
May 16, 2010

math
Nikki cam word process 7 words in 6 seconds. At this rate, how many words can she process in 3 minutes?
May 16, 2010

math
In how many ways can a cashier give change of exactly 60 cents if he has the following coins available? 10 quarters; 10 dimes; 10 nickels
May 16, 2010

IT 210
Generate an object-oriented design for a system that keeps tracks of your CD and DVD collection. · Identify each of the classes, associated data, and operations for the classes. · Generate the pseudocode for each of the classes as demonstrated on p. 251. ·...
May 16, 2010

Economics
A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resorts operating costs are essentially the same in winter and summer. Management charges higher nightly rates in the winter, ...
May 16, 2010

Economics
The U.S. cigarette industry has negotiated with Congress and government agencies to settle liability claims against it. Under the proposed settlement, cigarette companies will make fixed annual payments to the government based on their historic market shares. Supposed a ...
May 16, 2010

chemistry
Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. Note: Pay attention to significant figures. Do not round until the final answer.) The molar heat of reaction,delta H rxn , for the reaction of Ca(s) + 2H+(aq)->...
May 16, 2010

Chemistry
What catalysts are used to manufacture sulfuric acid and nitric acid?
May 15, 2010

Grade 8 Geometry
In a triangular prism V=(1/3)x(Base Area)x(Height) To find Base Area in the case of triangular prism we use the formula for area of a triangle that is A=(1/2)x(L+W)
May 15, 2010

math
Suppose that an experiment has five separate mutually exclusive outcomes: A, B, C, D, and E. If the sample space for the experiment is a uniform sample space, what is p(a or e)
May 12, 2010

life science
An organism's ability to maintain steady internal conditions despite changes in its external environment is called biogenesis homeostasis osmosis respiration In an organism, a virus enters, and reproduces within, a(n) host cell infection interferon parasite The theory that...
May 12, 2010

Math
Can someone please condense this expression. I do not know how. 1/2ln(x^2+1)-4ln1/2-1/2[ln(x-4)+lnx]
May 11, 2010

English
What are some good key quotes (about 6-8) for Reverend Hale in The Crucible?
May 10, 2010

Schindler's List Essay
lol
May 8, 2010

math
what is the scientific notation of 1,200,000
May 7, 2010

Science
That is the dental formula of a cow.
May 4, 2010

math
what is a fraction between 1/3 and 2/3?
May 4, 2010

chem
14?
April 29, 2010

alegbra
cmon u don't need help for this one ! but anyway here is a hint : REPLACE enough said :)
April 29, 2010

Maths
if i understood the question correctly, here is how u do this : percentage = (113/1600)*100 = 7.0625 % 2 decimale places : there is a 2 after the 6, 2<5 thus u don't increment the 6 and the answer is 7.06 %
April 29, 2010

alegbra
true i am sorry for that ! thanks Reiny for correcting :)
April 29, 2010

alegbra
(x-5)(x+19) = x^2 + 14x - 95 second degree equation (y = a*x^2 + b*x +c), must use Delta = b^2 - 4*a*c to solve it *** Solution *** Delta = (14)^2 - 4*(1)*(-95) = 596 > 0 two solutions: x1 = (-b-sqrt(Delta))/(2*a) x2 = (-b+sqrt(Delta))/(2*a) Numeric Application : x1 = -19 ...
April 29, 2010

Calculus
to calculate the max of any function (absolute or relative) u must derivate it and find the value of x that cancels that derivative. for your case, here is the solution : *** Solution *** let's derive f(x): f'(x) = 5 - 5*e^(5x) condition that we impose : f'(x) = 0 ...
April 28, 2010

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