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August 28, 2014

Posts by dan


Total # Posts: 883

com 170
write a brief paragraph about which paragraph was more effective and analyze why this is so from chapter 32 real essays with readings appendix g include a discussion of sentence variety and rythem of the author's writing
January 11, 2011

com 170
identify the three key parts of a paragragh. discuss their relationship with one another.
January 11, 2011

4th grade math
3/4*
January 10, 2011

4th grade math
gina is correct because 3/4 equals 0.75. 4/5 is bigger than 3/5 by 1/20.
January 10, 2011

Math
thanks!
December 20, 2010

Math
make a conjecture (obsevations based on patterns) for each sequence below. a)7,10,13,16 b)4,44,444,4444,44444 c)2,10,50,250 d)1,2,6,42,1806,3263442 i got some of them but i think they need to be writen better a)Add three to each number to get the next number in the sequence. b...
December 20, 2010

physics
Sam tosses a ball horizontally off a footbridge at 3.2 m/s. How much time passes after he releases it until its speed doubles?
December 20, 2010

Math
could you please solve the problem completely .. i am still confused. Thanks.
December 19, 2010

Math
Given [(x-5)/(x-3)]^2 . Find any stationary points and any points of inflection. Also find any horizontal and vertical asymptotes.
December 19, 2010

Math
Given y = x^4 − 4x^2 + 50. Find any extrema and any points of inflection
December 19, 2010

Calculus 1
Given y = x^4 − 4x^2 + 50. Find any extrema and any points of inflection
December 19, 2010

Math
how did you get x to equal 400
December 17, 2010

Math
to identical jars are filled with equal amount of marbles. the marbles are coloured red or white. the ratio of red to white marblesis 7:1 in jar 1 and 9:1 in jar 2. if there are 90 white marbles altogether, determine the number of red marbles in jar 2.
December 17, 2010

Chemistry
How many grams of iron can be produced of 156000 calories of heat are absorbed by a large enough sample of iron III oxide
December 12, 2010

Calc
express 3ln(r)- 5ln(s)+ 7ln (t) as a single logarithm.
December 9, 2010

chemistry - chromatography
We used three different color dyes in both alcohol and water. So its the chemical makeup of each color that determines the Rf value?
December 8, 2010

chemistry - chromatography
Hello, can you tell me why different colors have different rf values
December 8, 2010

Basic Electronics
discuss your thoughts on the use of thevenin equivalent circuit.
December 8, 2010

Physics
The displacement from the equilibrium caused by a wave on a string is given by: y(x,t) = (-0.00200 m)sin[(40m^-1)x-(800s^-1)t]. What is the number of waves in 1 m?
December 6, 2010

Physics
Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total work done on the gas if it follows the constant temperature path A-C followed by the constant pressure path C-D. A = 2atm and 4L C = 1atm and 8L D...
December 6, 2010

physics
A town is planning on using the water flowing through a river at a rate of 5.0X10^6 kg/s to carry away the heat from a new power plant. Environmental studies indicate that the temperature of the river should only increase by 0.50ºC. The maximum design efficiency for this ...
December 6, 2010

chemistry
CuCl --> Cu+ & Cl- Ksp = [Cu+2] [Cl-] ========================= Cu+(aq) + 2 Cl ‾(aq) ==> CuCl2 ‾(aq) K = [CuCl2 ‾] / [Cu+2] [Cl-]^2 =============== (K) (Ksp) = [Cu+2] [Cl-] times [CuCl2 ‾] / [Cu+2] [Cl-]^2 reduces to: (K) (Ksp) = [CuCl2 ‾...
December 4, 2010

chemistry
Find out: a) How many grams of lithium are required? b) How many grams of each product can be produced?
December 4, 2010

Math
the rule is this: A prime can be written as a sum of two squares. I hope that helps
December 4, 2010

com155
ok I got it now.. thank you very much!!
December 4, 2010

com155
The role of education plays a big part in financial planning (PRESENT). It has worked a crucial part of becoming successful with your money (PRESENT PERFECT TENSE). It will help you in learning basic math skills in order to better your finances (FUTURE TENSE). The whole idea ...
December 4, 2010

com155
Okay! I hope this is it. The role of education plays a big part in financial planning (PRESENT). It has worked a crucial part of becoming successful with your money (PAST). It will help you in learning basic math skills in order to better your finances (FUTURE TENSE). The ...
December 4, 2010

com155
OK! I will try going over the site you sent me and try again.. Thanks a lot!
December 4, 2010

com155
HOW ABOUT THIS? The role of education plays a big part in financial planning (PRESENT). It has been a crucial part of becoming successful with your money (PAST PREFECT TENSE). It will help you in learning basic math skills in order to better your finances (FUTURE TENSE). The ...
December 4, 2010

com155
OH! Thank you! I did not know it said that. I am having trouble understanding it. thank you! So, does that mean I have to start all over? Did I at least get all the verbs right?
December 4, 2010

com155
Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in bold and, in parentheses, identify the specific tense used The role of education plays a big part in ...
December 4, 2010

English 101
MARVELOUS 1. extraordinarily good; used especially as intensifiers 2. too improbable to admit of belief 3. being or having the character of a miracle UNCANNY of a strange nature; weird; mysterious Example That two people could be so alike was uncanny.
December 4, 2010

com155
thank you
December 4, 2010

com155
Yes! That is what I am trying to figure out.
December 4, 2010

com155
Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in bold and, in parentheses, identify the specific tense used. THIS IS WHAT I WROTE: The role of education...
December 4, 2010

physics
thanks, I see where I messed up at...
November 30, 2010

physics
The Cedar Bluff express KAT bus averages 15 mph for 20 minutes, and then 32 mph for 14 minutes. What was its average speed? (mph)
November 30, 2010

physics
Suppose that you measured the moment of inertia of the system as I = 5.05 kg-m2. Assume the diameter of the pulley around which you wrap the string is d = 2.5 cm. a) suppose the system is initially spinning at angular speed ωo = 2.05 rad/s. After you drop a cube of mass ...
November 30, 2010

Calculus
i still did not understand. if u dont mind could you please explain it again and also the question asks for the intervals and the points. could you give the intervals and points for the the questions above in the questions .. Thanks a bunch :).
November 29, 2010

Calculus
Find: (a) the interval(s) on which f is increasing, (b) the interval(s) on which f is decreasing, (c) the open interval(s) on which f is concave up, (d) the open interval(s) on which f is concave down, and (e) the X-coordinate(s) of any/all inflection point(s). f(x)= (x^4) - (...
November 29, 2010

calculus
A cone of radius r centimeters and height h centimeters is lowered point first in at a rate of 1 cm/s into a tall cylinder of radius R centimeters that is partially filled with water. How fast is the water level rising at instant the cone is completely submerged?
November 19, 2010

Math
Solve: x'=x+y+2t y'=x+y-2t
November 18, 2010

physics
80cm=0.8m T=25/14=1.786...seconds v=(2pi*r)/T=2pi(0.8)/1.786...=2.815...m/s a=v^2/r=2.815...^2/0.8=9.904m/s^2, towards the centre along the radius vector of the circle
November 16, 2010

math
The first angle of a triangle is 24 more than the second. The third angle is twice the first. Find the measure of the angle of the triangle.
November 15, 2010

Physics Spring
A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 1.0 J of work is required to compress the spring by 0.12 m. If the mass is released from rest with the spring compressed, it experiences a maximum ...
November 15, 2010

physics please help
The femur is a bone in the leg whose minimum cross-sectional area is about 3.60 10-4 m2. A compressional force in excess of 6.90 104 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. (b) What is the strain that exists under a maximum-stress ...
November 14, 2010

Flec
what is a prime factor? How do I find the prime factor?
November 9, 2010

physics help
i dont get this either please help me thanks.
November 8, 2010

physics please help me
i understand but how to i go about solving this thats what i need help in, if that assumption is made.
November 7, 2010

physics please help me
A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 = -.825 ball 2...
November 7, 2010

physics please help me
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has just ...
November 5, 2010

Calculus
P(x)= -x^3+15x^2-48x+450, x>/3 is an approximation to the total profit (in thousands of dollars) from the sale of x hundred thousand tires. find the number of hundred thousands of tires that must be sold to maximize profit.
November 4, 2010

Calculus
find the absolute extrema if they exist as well as where they occur f(x)= x-1/x^2+3x+5
November 4, 2010

Calculus
Find all extrema, inflection points, and asymptotes where applicable f(x)= 2x^3-12x^2+18x I got 0, 8 for extrema 2, 0 for I.P and I don't know how to find asymptotes
November 4, 2010

Calculus
Find the indicated absolute extremum as well as all values of x where it occurs on the specified domain f(x)= x^2e^-0.25x ; [3,10]
November 4, 2010

Math please help!
x=speed of boat in still water. assuming the problem implies 26 miles each way. to figure this out, I wrote this out in simple miles per hour terms. Example: (hours/mile)*miles + (hours/mile)*miles = hours so: (1/(x+5))*26+(1/(x-5))*26=10.6 x+5 represents the speed of the boat...
November 3, 2010

chem need assistance
Write a balanced chemical reaction to show the reaction between ammonium and a chlorite? Is this correct? 2NH3 + CLO2 + H2O ⇒ NH4Cl + NH2O2
November 1, 2010

chem
complete this reaction 2 NaNO3 + ht →
November 1, 2010

chem
Complete the reaction? IF no reaction say so H2O C4H6O3 ====> H2O c) Cu ===== > H2O d) K2O=====> e) 2 NaNO3 + ht →
October 31, 2010

HELPPPPP
so im done with everything except fro this question : A(n) 2.3 kg object moving with a speed of 8.6 m/s collides with a(n) 4 kg object moving with a velocity of 8.8 m/s in a direction39.0135◦ from the initial direction of motion mof the 2.3 kg object.What is the speed of...
October 27, 2010

Chemistry
Determine the mass of zinc sulphide,ZnS which is produced when 6.2 g of zinc and 4.5 g of sulphur are reacted. This question is really confusing me, and I'm not sure where to start. I think I have to calculate the moles of each given reactant first in which case I have: ...
October 17, 2010

Chemistry
Determine the mass of zinc sulphide,ZnS which is produced when 6.2 g of zinc and 4.5 g of sulphur are reacted.
October 17, 2010

Chemistry
I'm not understanding. what do you mean figure the moles of H2O2 in 3.4 g of water? You get the same number of moles of water? I calculated: nH2O2 = 3.4g/34.02g/mol= 0.0999412 mol Water on the other hand has 18.02 mol sorry but I'm not understanding. I think for this ...
October 17, 2010

algebra
two planes take off from an airport at the same time and head in opposite directions at 260 mph and 275 mph respectively. in how many hours will they be 1605 miles apart?
October 16, 2010

chemistry
Suppose you put 50mL of water in the can instead of 100mL and heated it to 40 degrees instead of 20 degrees. In what ways, if any, would this afect the results of the experiment? What would happen if you used 200mL of water and heated it only 10 degrees? Can you think of any ...
October 6, 2010

College Physics
A car starts from rest on a curve with a radius of 150 m and accelerates at 1.50 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 3.20 m/s^2 ?
October 4, 2010

College Chem
How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? Convert liters to milliliters and then to grams. can you convert mil to grams?
October 3, 2010

Chemistry
1 gallon toluene = about 3,785 mL density = about 0.867 g/mL mass toluene = 3785 mL x 0.867 g/mL = 3282 grams. C7H8 + 9O2 ==> 7CO2 + 4H2O moles toluene = grams/molar mass = 3282/92 = about 36 moles. From the equation above, 1 mole C7H8 will produce 7 moles CO2; therefore, ...
October 3, 2010

Chemistry
can't convert ml to grams
October 3, 2010

Chemistry
How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned
October 3, 2010

chemistry
How much heat is released when one gram of toluene burned?
October 3, 2010

German
Actually, it is "Mein Name ist ... " or better and not as awkward (as being the correct German phrase) "Ich heiße ...".
September 24, 2010

calculus
Use the four-step process to find the slope of the tangent line to the graph of the given function at any point. (Simplify your answers completely.) f(x) = 2x^2 + 7x
September 16, 2010

Astronomy and Space
Using a telescope, which planets acn be observed from Earth in a crescent moon phase?
September 14, 2010

chem2
If you have an insulated glass of water at 25 oC containing 10 fluid oz at 25 oC, how much ice would you have to add to end up with a final temperature of 0 oC and no ice left?
September 6, 2010

chem
If this sample of dry ice were to be placed in an evacuated 1.0 L container and allowed to come to room temperature (25 oC), what would the pressure be?
September 6, 2010

chem
would you see a decrease in volume
September 6, 2010

chem
If ice were to be placed in a container at a temperature of -2 oC, with a water vapor pressure of 2 torr, you would see a decrease in the volume of solid ice over time.
September 6, 2010

chem
283.5 x .5 + 10 x 1 X (X)=0
September 6, 2010

chem
If you have an insulated glass of water at 25 oC containing 10 fluid oz at 25 oC, how much ice would you have to add to end up with a final temperature of 0 oC and no ice left?
September 6, 2010

Physical Science
.In the early 1900s, two associates of New Zealander Ernest Rutherford bombarded thin sheets of gold with positively charged subatomic particles. They found that most of the particles passed right through the sheets but some bounced back as if they had hit something solid. ...
September 3, 2010

math
You are offered two different sales jobs. The first company offers a straight commission of 4% of the sales. The second company offers a salary of $ 500 per week plus 2% of the sales. How much would you have to sell in a week in order for the straight commission to be equal to...
August 30, 2010

Accounting
HOW DO I find the net icome for this company with this information? Beginning of the year: ASSETS WERE $810,000 lIABILTES WERE:$324,000 eND OF YEAR: aSSETS WERE: $1,296,000 AND lIABILTES WERE:$540,000. cAPITAL STOCK OF $162,000 WAS ISSUSED dIVIDENDS OF $72,OOO WERE PAID
August 29, 2010

accounting
How do I find the net income for this company ,with this information? Beginning of year Total Assets were:$810,000 Total liabilites were:$324,000 End of year Total Assets were:$1,296,000 Total liabiltes were:$540,00 Capital stock of $162,000 was issued dividends of $72,000were...
August 27, 2010

algebra 2
I'm stuck on this one: factoring polynomials from algebraic expressions (and it says you can use the substitution method): 3m^2(2p^2+3)over (x^2+y)(2x-y^2) minus 6m(2p^2+3)over (y^2-x)(2x-y^2)= Do I find the GCF? I get 3m(m-2) over (x^2+y)(2x-y)(y^2-x) ????
August 15, 2010

algebra 2
I'm stuck on this one problem. The directions say: Solve the following leaving the sq. rt. in it's simplest form: sq.rt of 33+ sq.rt of 96 - sq.rt of 3 = I think it can't be simplifed---am I correct? (the directions did say that some of the problems can't be ...
August 14, 2010

xacc 280
Post one or two new concepts you learned from each of the PhxKlips
July 31, 2010

Physics
It took a stopping train 41/4min to travel between two stations 11.2km apart.The train accelerated uniformly during the first 11/4min of the journey,and decelerated uniformly to rest during the last 3/2min of the journey.The train had moved with uniform speed during the ...
July 11, 2010

Mec 123
A flywheel rotating at 5.3 revolutions per second has an angular retardation of 4/5 radian per second per minute.calculate:(i)its angular velocity after 45 seconds(ii),the number of revolutions it makes in 1 minute, and in coming to rest.
July 10, 2010

math
Show that x^2+y^2-6x+4y+2=0 and x^2+y^2+8x+2y-22=0 are orthogonal.
July 9, 2010

German
Yup. Some English here, please :) ... Would help a lot.
June 22, 2010

college
You're thinking of investing in a automation project to reduce cost of production. -Investment in Fixed Assets: $900,000 at t=0; salvage value of $300,000 at t=6; straight line deprectiation over 6 years (assume book value is 0 at t=6) -Investement in NWC: $250,000 at t=0...
June 19, 2010

geometry
A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
June 19, 2010

trig
X=38.21
June 7, 2010

Fracture Math word
Dig
May 11, 2010

Chemistry
Is 20.0 mL of 3.0 M HF a buffer solution with an approximate pH of 3?
May 4, 2010

Chemistry
What is the molar solubility of silver sulfide, Ag2S? (Ksp for Ag2S is 6.0 x 10^51.)
May 4, 2010

chemistry
what volume would 8g of He at.951 atm and 25c occupy?
May 2, 2010

algebra-is this right
A basketball player has a vertical leap of about 36 in. If the equation d=48t^2 describes his hang time t as a function of his vertical leap d. what is his hang time? Show your work. 36=48t^2 t^2=3/4 t=(1/2)sqrt(3)seconds
April 25, 2010

algebra
Thank you for your help and reminding me there is two answers.
April 25, 2010

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