Tuesday
March 28, 2017

# Posts by Mark

Total # Posts: 1,609

math
Consider the following binomials. A=(x^2+5x) B=(6x+30) Part 1: Factor each binomial by finding the GCF. Then, add the two factored binomials to make a single expression. Part 2: Now add the original forms of binomial A and B together to make a trinomial. Factor the trinomial. ...
February 2, 2008

math
When a figure is drawn in quadrant 2, and you reflect it over the x axis, do you reflect in quadrant 1 or four? I think you reflect it in quadrant 4. Also, where would you reflect it over the x axis when the original figure is in quadrant 1? And y axis?
February 2, 2008

math
Consider the following binomials. A=(x^2+5x) B=(6x+30) Part 1: Factor each binomial by finding the GCF. Then, add the two factored binomials to make a single expression. Part 2: Now add the original forms of binomial A and B together to make a trinomial. Factor the trinomial. ...
February 2, 2008

math
Simplify the expression 6x x 2x^3 x 3x^2y^2/3x^3 x x^4y. I'm confused. The only thing I did was simplify 3x^2y^2/3x^3 to x^1y^2. I need help with the problem.
February 2, 2008

math
When a figure is drawn in quadrant 2, and you reflect it over the x axis, do you reflect in quadrant 1 or four?
February 2, 2008

math
The old lion cage at the zoo was a square, with sides x meters long. For the part of the zoo's 50 birthday celecration, the zoo expanded the length and width. The expression for the total area of the new cage is (x^2+18x+81) square meters. Part 1:Robert thinks that the ...
February 2, 2008

math
So, do you add the product to 32.25? If so, I rounded the sales tax to 2.34 and added 2.34 to 32.25 and I got 34.59.
February 2, 2008

math
Sneakers were on sale for 25% off their original price. Lola bought a pair of sneakers that had an original price of \$43. She also paid a slaes tax 7.25% on the sale price of the sneakers. How much did Lola pay for the pair of sneakers? Round to the nearest cent. So far, I ...
February 2, 2008

math
Damien sets up a bucket to catch raindrops. The bucket can hold only 1 gallon. If each raindrop is made up of about 1/90 fluid ounceof water, how many raindrops will the bucket be able to hold? I need help with this question. I know that 1 gallon=128 fluid ounces. I need a ...
February 2, 2008

English
Thanks, I have read it through, it just doesn't all connect so easily for me. I get that the conversation with his mom is important and all, but I don't necessarily see why all the other conversations with people from the Iliad made him learn a lesson. Blech. My brain ...
January 27, 2008

English
The Odyssey By Homer -- Book 11 What lesson does Odysseus learn about himself? How has it strengthened his resolve to return to Ithaka?
January 27, 2008

Earth science
a fault is observed in a road cut, but there is no obvious rock units to correlate on either side of the fault to determine relative movement. How might you determine or even infer whether the hanging wall has moved up or down relative to the footwall
December 30, 2007

Microeconomics
Consider a competitive firm that produces tomatoes. The total fixed costs are \$10 and TVC is related to output according to the followin scheduele Quantity TVC 0 0 1 45 2 85 3 120 4 150 5 170 1)Compute ATC and MC 2) What is quantity if P=40 3)what is quantity if P=30 4)What is...
December 11, 2007

Research Paper
My topic was Jim Crow Laws. I have to write a 5 page research paper. ANY criticism would help. This my first one so its pobably very bad. Could you reveiew my first paragraph and my thesis statement: In 1890, a new Louisiana law required railroads to provide “equal but ...
December 8, 2007

calculus
is (x)/(x^2-9) an even or an odd function?
November 19, 2007

chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HClO HClO3 HClO2 HClO4
November 18, 2007

chemistry...
ah please ignore, i got it!!
November 16, 2007

chemistry...
thanks for the last help, i got the right answer!! i got this wrong... (answer is supposed to be 0.165 but i put 0.0652) A sample of Na2CO3 weighing 0.2863 g is dissolved in 50 mL of water and an endpoint is reached when 32.83 mL of HClO4 has been added. Calculate the molarity...
November 16, 2007

chemistry
ahhh im confused!! Calculate the pH of a solution formed by mixing 372 mL of a solution containing 4.4 x 10-6 M NaOH with 286 mL of 6.0 x 10-2 M NaOH. Report your answer to 2 decimal places.
November 16, 2007

chem
is a formate ion (HCOO-) an acid or a base? how would you know?
November 16, 2007

chemistry
thank you!!
November 12, 2007

chemistry
An aqueous solution of ethanol is 3.05 M in ethanol, CH3CH2OH. Calculate the mole fraction of ethanol if the density of the solution is 0.964 g mL-1.
November 12, 2007

algebra
what if it was something like: 2.038x = 5.381x?
November 12, 2007

algebra
x = 2.077(0.481x) x = 0.999x how would i solve for x?
November 12, 2007

religion
Frankfurter puts together several accounts of monstrous ritual. Account for the similarities between these accounts. HELP
November 10, 2007

Physics
A solid cylinder (radius = 0.150 m, height = 0.120 m) has a mass of 7.00 kg. This cylinder is floating in water. Then oil ( = 725 kg/m3) is poured on top of the water until the situation shown in the drawing results. How much of the height of the cylinder is in the oil?
November 6, 2007

religion--verse explaining
i think it is more profitable to look at all the attributes of spirtual malpractise in given cultures, and when we do so we find a set of oppositions that maintains remarkable consistency as a set, despite variations between cultures. can someone explain what this verse means...
November 1, 2007

Religion--thesis statement help!
Majority is where evil exists and the individual is distinctly evil, and minority is when evil does not exist, rather the actions one does can be considered evil through explanation. i need to write a strong thesis statement agreeing with the minority view
November 1, 2007

religion
Unruly Evil by david pocock can anyone explain to me what is being said in this text. I do not understand it at all, and our prof will not help us understand it either. I need help majorily!
October 31, 2007

Religion
Unruly evil by David Pocok - what does pocock mean by unruly evil? - for pocock, how is evil related to order and to explicability
October 31, 2007

biology
how does cellulose adapt to its function!? i think it has something to do with there being a strong cell wall. however im am unsure. please could somebody help me thanks
October 25, 2007

Geography
Do you feel suburbia is a sustainable way of life?
October 16, 2007

Physics
Cheers bob thats a great piece of kit. Mark
October 13, 2007

Physics
Hi can someone advise whether my methodology is right on this with a potential energy of 589 kJ per tonne, 100 tonnes of water per second are delivered to a turbine. Assuming all the potential energy of this water is used to drive the turbine how much power will be delivered ...
October 13, 2007

Physics
Thanks Bob I had assumed a uk tonne at 1016 kg Mark
October 13, 2007

Physics
Hi Can someone check and advise on this potential energy of 2 tonne of water held 120m above a flood plain by a dam. potential energy = 2032 kg (2 Tonne) x 9.81 ms x 120m pe = 2392070.4 Joules Convert to kilojoules 2392070.4 / 1000 pe = 2392 kJ (To four significant figures) ...
October 13, 2007

Computers
Sort an array of ten 30 character items into ascending order of surname. Each line contains a name in the form e.g. Mr J Smith, Dr John R Smith or John Smith. There are no field or record delimiters, qualifications, suffixes, double-barrelled names or similar complications. ...
October 12, 2007

Mathematics
Four people are standing in a line, each facing forwards. They are not allowed to move, turn their heads or speak (except to give the answer). The fourth is behind a partition wall and can neither see nor be seen by the other candidates. Each is wearing a backpack of unknown ...
October 12, 2007

Science
How do I tell how many electrons are in an element?
October 10, 2007

chemistry
how many moles of x in 33.3g of substance?
October 4, 2007

Pre-Algebra
My stab at it... A+B=91 (Combined age) A=2B B=91-A (Age of Person B now) Substituting: A=2(91-A) = 60.66 or 60 2/3 60.66+B=91 B=30.33 (or 30 1/3)
October 1, 2007

intermediate algebra
the sum of a number and one
September 27, 2007

Ethic
Thanks for your inputs, and thinking more into the question, this is more on ethics. Can you give me some more reasoning on the ethics point of view?
September 20, 2007

Ethic
Business invest time to attract customers, but some customers are simply not worth having. So some business think that they should fire the customers they lose money on. -Is it acceptable to fire customers who cost you money? -Is it acceptable for the company to focus efforts ...
September 20, 2007

why were their 3 presidential candidates in the election of 1812.. i think that is the year. Whenever roosevelt was running with taft. please help me out with the answer as to why there were 3 parties..
September 15, 2007

ok, that will help me with my proofs, but I need ideas on what points to use...
September 7, 2007

How can I prove that advertising GREATLY influences in shaping consumer's purchase decision? So far, I have peer pressure, discounts...I'm not sure if they're even strong ideas :?
September 7, 2007

math
Hi how would i go about solving this. It's fraction + fracion over fraction+fraction -4/5+3/5 __________ 1/3+1/5
September 6, 2007

irish
what is the irish word for homework
September 5, 2007

a1 nvq
How would you encourage candidates who have different levels of confidence and experience to take an active part in their assessments?
September 4, 2007

physics
number 1 is d and number 2 is a
August 31, 2007

social studies
The oldest wonder was built around 2550 B.C. what is it?
August 29, 2007

Critical Thinking
why are you asking for help. Read the assignment and you should be able to come to your own conclusions instead of taking the easy way out. What are you learning if you have to ask for answers? Is this an online course?
August 23, 2007

Math
Hi, how would we solve a problem like this? The path of the ball for many golf shots can be modelled by a quadratic function. The path of a golf ball hit at an agle of about 10 degrees to the horizontal can be modelled by the function : h= -0.002d^2+0.4d where h is the height ...
May 25, 2007

Chemistry
1.Arrange the following oxides in the order of increasing basicity. -Al2O3 -B2O3 -CaO -Ga2O3 -In2O3 -RaO 2.Arrange the following oxides in the order of most basic to most acidic. -Al2O3 -Cl2O7 -Cs2O -N2O5 -Na2O -P2O5 -SO3
April 23, 2007

calculus
The base of a solid is a circle of radius = 4 Find the exact volume of this solid if the cross sections perpendicular to a given axis are equilateral right triangles. The equation of the circle is: x^2 + y^2 = 16 I have the area of the triangle (1/2bh) to be equal to 2sqrt(12...
April 22, 2007

calculus
The base of a solid is a circle of radius = 4 Find the exact volume of this solid if the cross sections perpendicular to a given axis are equilateral right triangles. I have the area of the triangle (1/2bh) to be equal to 2sqrt(12) (1/2 * 4 * sqrt12) I don't know what to ...
April 22, 2007

Math
I'm trying to use DeMoirre's Theorem to compute and express this in rectangular form. Here's the expression: (-1 + i)^5 The ^ means it's to that power. It's to the fifth power. Any help would be appreciated. Figured it out myself. 4 - 4i is the answer.
April 17, 2007

Social Studies
What 20th-century conflict was dubbed the "forgotten war" despite 54,246 U.S. deaths? That would be Korea... this is an excellent site: (Broken Link Removed) It shou be the The Korean War. You might want to double check.
March 29, 2007

Math
Below are the grades of 50 students on a marketing test.
March 27, 2007

Math
11. (3 pts) The results of a survey for an airline are shown below Traveler
March 26, 2007

Physics
First, you should have appreciated that there is no such thing as negative work (you can't "undo" work by doing work in a different direction). This immediately eliminates answers b and c. The remaining answers rely on your clear understanding of the definition/...
March 26, 2007

Math
In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also express the events in...
March 25, 2007

What is odorless, colorless, weightless. When put in a drum it makes it lighter.
March 23, 2007

A Stalagmite
March 23, 2007

chemistry - kinetics
The activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that have an energy of 160 or greater at 500 K? 510 K? What is the ratio of the fraction at 510K to that at 500K? I missed this lesson today ...
March 6, 2007

Science
An archaeologist finds an old piece of wood. The carbon-12 to carbon-14 ratio 1/16 the ratio measured in a newly fallen tree. Estimate the age of the piece of wood
March 6, 2007

math
(2w-1)^2=4(w-3)^2 Expand both sides of the equation, then simplify: 4w^1 - 4w + 1 = 4w^2 - 24w + 36 ...... ..... w = 7/4
February 26, 2007

Math
What is the product of 5x^2 and 3x^5? exponents add, so 15x7
February 23, 2007

Math
The expression (3x+4) (2x-6) is equavalent to? 3x(2x-6)+4(2x-6) multipy out brackets to give: 6x^2 - 18x + 8x - 24 collect like terms to get: 6x^2 - 10x - 24
February 23, 2007

science
Having a hard time understanding "representative particles". ie. which are atoms, compounds etc. For example, what is the representative particle for sodium fluoride? carbon monoxide? Atoms are the smallest unit of an element. Molecules are composed of two or more ...
February 20, 2007

Chemistry and Balancing
Mr Pursley. i was wondering if you would be kind enough to explain to me the process of balancing equations I undestand some of the rules but I continue, to make simple mistakes. Would you kindly offer some assistance please, via email. To help me get through this plateau. ...
February 14, 2007

ETH123
What are the most significant similarities between the Chinese American and Japanese American [cultural] experiences? What are the differences? Please refer to this post, recently answered: http://www.jiskha.com/display.cgi?id=1170193455 =)
February 8, 2007

SCIENCE
What type of bonding holds the compound, sodium cyanide, together? The CN bond is covalent. The Na to CN bond is, in most minds, an ionic bond. The electronegativity of C is about 2.1 and that of Na is about 1; therefore, with a difference of about 1 it is polar covalent. ...
February 7, 2007

CHEMISTRY
Given assumed valencies: H=1, N=3, & C=4 i am now required to draw the structural formulae of HYDROGEN CYANIDE and CYANOGEN. H:C:::N is the Lewis electron dot structure. If you want to use "sticks" as a bond instead of two electrons, one stick stands for two ...
February 7, 2007

SCIENCE CHECK
Pleas check the following for me... "A drop of oil (vol 0.051cm ) is released on to the surface of a pond where it covesr an area of 40cm2. Assume that the oil film has a uniform thickness equal to the diameter of an oil molecule. Calculate the diameter of an oil molecule...
February 6, 2007

chemistry
February 5, 2007

CHEMISTRY
I am given a list of apparatus, liquids & solids and am trying to convert aluminium selenide from solid to geseous states does the following sound correct?... Aluminum selenide (in the round-bottomed flask) reacts with water (coming from addition funnel which is connected via ...
February 4, 2007

CHEMISTRY
What is the true meaning of dimerize and trimerize - neither of these words are found in any dictionary and hence, are not actually in use: scientific jargon perhaps, but not proper English. Also, if it is in proper use, in the UK, is it spelt dimerise & trimerise ending in SE...
February 4, 2007

Chemistry
How would I explain how I arrived at the following EF in words?
February 3, 2007

help me unscramble this word
G E D Y R A A
January 25, 2007

eth
research to determine if the group colonized or if it immigrated to the United States. Did the group face prejudice, segregation, racism or any combination of the three? If so, how and why? Include your research findings in your essay. You may search through chapters of the ...
January 24, 2007

eth
Imagine yourself as a current member of that group, and consider the question, “Would I want to immigrate to the United States, and why?” Think about what opinion you would have of the immigration process, including naturalization, the costs, fingerprinting, etc. ...
January 24, 2007

eth
Should United States government policy favor certain kinds of immigrants? o Should [citizenship] preference be given to the neediest applicants? The most talented? The most oppressed? The richest? o Should applications from certain countries be given priority? Please let us ...
January 24, 2007

Science
What are the formulas for lithium bromide? http://www.webelements.com/webelements/compounds/text/Li/Br1Li1-7550358.html where can i find the formula for cupric nitride,and magnesium chloride also. and what are the formulas for the compounds formed by Fe2+,Cl- how do you figure...
January 7, 2007

Pre-Calculus
One model for the population P of bacteria in a sample after t days is given by P(t) = 1000 - 19.75t + 20t² - 1/3t³ Whoops accidently hit post question a)what type of function is P(t) b)when is the bacteria population increasing c) When is it decreasing
December 29, 2006

ANALOGIES
i lied i don't know
December 11, 2006

SCIENCE.... just need a web
Do you know a website that I could find something about humidity? THANKS A LOT !!!! What exactly do you need to know about humidity? type in "humidity", except more specific, on google. http://en.wikipedia.org/wiki/Help:Contents
December 6, 2006

Science
What has a physical and chemical change at the same time, apart from a candle burning wood.
December 5, 2006

Math Word Problem
A turtle crawls a hill 2 feet and slides back 1 foot each attempt. How many attempts will it take to reach the 14 foot hill? Please explain. Thanks
December 4, 2006

biology: chitinase
In an experiment I did, Serratia marcescens grew really well in the Sherry cooking wine I used. Is this because the chitinase that the Serratia marcescens producing binds the carbs with the alcohol?
December 1, 2006

egg weight
Anyone know the weight of an egg. I need it to do some calculations for my science project. IT depends on the size of the egg. Eggs vary from 35 grams (small egg) to 75 grams (AA large).
November 30, 2006

Math
How do I use pythagorean theorem if I already know what c is, but I am missing one of the legs? If you know the length of one of the legs, a (besides the hypotenuse, c), then use b^2 = c^2 - a^2 and solve for the unknown leg length, b. This only works IF it is a right triangle.
November 28, 2006

Social Studies . HELP!!!
November 19, 2006

Algebra
solve (3,5) and (9,8)
November 3, 2006

Chemistry
why does inoinzation energy tend to decrease from top to bottom within a group? i'm not sure, but i think it has something to do with the size of the element The electrons involved in ionization, that is, the outermost electrons, are farther away from the nucleus, and are ...
October 31, 2006

math
what is n! ? It stands for n factorial. For example, if n = 3, then 3! is 1 x 2 x 3 = ??
October 31, 2006

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