Friday
December 19, 2014

Posts by jenny


Total # Posts: 1,256

math
An elf has a staircase with 10 steps to climb. Each step it takes can cover either one stair or two stairs. In how many ways can the elf climb the stairs? For n stairs?
October 3, 2010

accounting 2
allen company sells flags with team logos. Allen has fixed costs of $588,000 per year plus variable costs of $ 5.50 per flag. Each flag sells for $ 12.50.
October 2, 2010

Physics
A pilot with a mass of 50 kg comes out of a vertical dive in a circular arc such that at the bottom of the arc her upward acceleration is 3.5g. (a) How does the magnitude of the force exerted by the airplane seat on the pilot at the bottom of the arc compare to her weight? (b...
September 29, 2010

calculus
consider the function f(x)=2x^2 +1. its tangent line at x=2 goes through the points (2,y1) and (-1,y2) where y1=?, y2=?
September 28, 2010

calculus
consider the function f(x)=2x^2 +1. its tangent line at x=2 goes through the points (2,y1) and (-1,y2) where y1=?, y2=?
September 28, 2010

calculus
if the tangent line to the function f(x)=ãx +a at x=16 has equation y=mx+6. find a and m. you may use the fact that f'(x)= 1/(2ãx)
September 28, 2010

calculus
for the function f(x)=4x^2 +7, find the equation of the tangent line to the graph of f at x+1. if the equation of the tangent line is written as y=mx+b. m=? b=?
September 28, 2010

chemistry
what flaws exist in Dalton's model of the atom?
September 26, 2010

Microeconomics
How did you get that answer pam??
September 23, 2010

science
of all the visible objects in the celestial sphere, which one appears to move the least? why?
September 17, 2010

science
which visible object in the celestial sphere moves the least? why?
September 17, 2010

calculus
if h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t^2+13t+1. find the height of the object at the time whent eh speed is zero
September 14, 2010

math
the unit rate for 442 mi in 8.5 hr
September 14, 2010

calsulus
if h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t^2+13t+1 find the height of the object at the time when the speed is Zero. h(t)=?
September 14, 2010

sociology
Using sociological imagination, analyze the scenary: Susy is a sophomore in college and get pregnant. Her boyfriend end up the relationship. Susy now drop all her classes
September 8, 2010

algebra 2
A chemist mixes some 20% acid solution with pure 100% acid to increase the concentration. How much pure acid and acid solution should be mixed to form 100 milliliters of 40% acid solution?
September 3, 2010

physics
A viaduct is being re-levelled by using a jackscrew with a pitch of 5mm. The mass of the top slab of the viaduct is 20 tonnes (20000kg) and its length is 40m. The lever arm used to turn the jackscrew is 60 cm long. Calculate the effort force to be applied to the end of the ...
September 2, 2010

science
an object has a volume of 74cm cubed and a density of .88g/cm cubed. What is the mass of the block?
August 31, 2010

com155 english
The issue about interest rates is the same as the supply-and-demand concepts. The higher the interest goes, the lower the demand on the market. The negative thing about low interest rates is that there is a tendency to increase prices of items because of the high rate in ...
August 30, 2010

dynamics, check my ans
Three identical train locomotives, on separate tracks, apply the maximum force needed to begin moving. The first train consists of a single empty freight car, the second train consists of 50 empty freight cars, and the third train consists of 50 equally loaded freight cars. ...
August 26, 2010

Science
I dont really get the question can someone explain to me?
August 21, 2010

Science
An area in your state has been flooded due to heavy rains. How might scientists from the three main branches of science interact in their study of the flood, its effects, and how future flooding might be controlled? Life science, Earth science, and physical scicence.
August 21, 2010

Math
Find the vertex of F(x) by using the formula for the x-coordinate of the vertex. F(x)= 4x^2 - 3x - 6 I don't exactly understand this question. could someone clear it up and help me solve it? Thanks!!
August 18, 2010

French
What is your favorite school subject? ^^
August 18, 2010

Chemistry
Calculate the ratio of moles of CO2 produced to moles of the original gas mixture? A mixture of methane (CH4) and ethane (C2H6) is stored in a container at 294 mmHg. The gases are burned in air to form CO2 and H2O. If the pressure of CO2 is 351 mmHg measures at the same ...
August 13, 2010

Chemistry
Calculate the ratio of moles of CO2 produced to moles of the original gas mixture? A mixture of methane (CH4) and ethane (C2H6) is stored in a container at 294 mmHg. The gases are burned in air to form CO2 and H2O. If the pressure of CO2 is 351 mmHg measures at the same ...
August 13, 2010

U.S government
sweet
August 12, 2010

U.S government
it can't be B or C so im thinking A
August 12, 2010

U.S government
Under the Articles of Confederation, what kinds of cooperation did the states agree to? A. work together to establish a judiciary for enforcing national laws B. pool their resources to form a national currency C. uphold each others' legal documents D. impose an income tax ...
August 12, 2010

U.S government
:) yea ive been having to think real hard. i so wish i didnt have to take this test
August 12, 2010

U.S government
thats what i guessed. geez this test is hard to pass
August 12, 2010

U.S government
Which quotation taken from the U.S. Constitution provides for limiting the power of government? A. "All persons born or naturalized in the United States...are citizens of the United States..." B. "This Constitution...shall be the supreme law of the land..."...
August 12, 2010

U.S government
A colony of a country that followed mercantilism during the 17th century would NOT be encouraged to develop __________. A. Farming B. Fishing C. Slavery D. Its own government i think c but idk
August 11, 2010

U.S government
b?
August 11, 2010

U.S government
Which institution developed outside the limits of the written Constitution of the United States? A. legislative branch B. political parties C. Supreme Court D. Electoral College
August 11, 2010

U.S government
sweet thanks
August 11, 2010

U.S government
i think its a
August 11, 2010

U.S government
Which statement best expresses the meaning of the opening words of the U.S. Constitution, "We, the people..."? A. sovereignty is derived from the consent of the governed B. all citizens are guaranteed freedom of speech C. federal laws are subject to popular ...
August 11, 2010

chemistry
For each gap of 1 on the pH scale, the pH becomes either 10x more acidic or basic depending on which direction you move in. In this case you will be come more acidic: 7-6 = 10x 7-5 = 100x 7-4 = 1000x 7-3 = 10,000x more acidic
August 11, 2010

U.S government
oh ok thank you
August 11, 2010

U.S government
i guess c
August 11, 2010

U.S government
idk i cant find it in my notes
August 11, 2010

U.S government
what is the term given to the activities of interest groups that seek to influence the making and implementation of public policy and to persuade government officials to support a group's position. A. Muckrakers B. Bribers C. Lobbyists D. Non-Governmental Organizations (NGO)
August 11, 2010

political science
he actually just said for us to look for a treaty and provide the following history, regime, and compliance. But what does he mean with history, regime, and compliance in relation to a treaty?
August 11, 2010

political science
My teacher post a essay question that needs to address the problem with a specific treaty or convention. But I do not understand what he means by also addressing the history, regimes, and compliance. What is he asking in relation to the treaty and essay?
August 11, 2010

math
A 120lb person should ear a minimum of 44 grams of protein each day. How much should a 180-lb person eat each day?
August 9, 2010

social studies
a form of government in which power is distributed to and shared by different politicla levels as between states and the central government???
August 6, 2010

eng. lll analogies
thank you very much :)
August 5, 2010

eng. lll analogies
i think its D but i need to be sure cause i can't get anymore questions wrong
August 5, 2010

eng. lll analogies
prologue : to epilogue as preface : ?A. introduction B. footnote C. table of contents D. appendix
August 5, 2010

algebra 2
It says to: Use the Distributive Property to show that the following are true statements: 8.5m + 1.3m = 9.8m What does it mean to use the distributive property? Can't i just add the first two terms?
July 28, 2010

algebra 2
The length and width of a rectangle are in the ratio of 5:12. If the rectangle has an area of 240 square centimeters, what is the length, in centimeters, of its diagonal?
July 22, 2010

us history vietnam war
How did President Kennedy respond to the news that the Viet Cong were winning their war against the non-communist government of South Vietnam? A. Kennedy sent combat troops to fight the Viet Cong. B. Kennedy ordered the U.S. Air Force to bomb North Vietnam. C. Kennedy sent ...
July 22, 2010

algebra II
Leona was in a golf tournament last week. All of her four rounds of golf were within 2 strokes of par. If par was 72, wat are the maximum and minimum scores that Leona could have made in the golf tournament?
July 15, 2010

college
With a mean of 72, and SD of 10 of High temprature: Temprature of 93 is how many SD above mean? Temprature of 54 is how many SD below mean? Show your calculations.
July 5, 2010

geometry
True or false? a!(b!c!) = (a!b!)c! I think its true...?
July 1, 2010

HISTORY
need a good hook on a habitat loss that would get ppls attention
June 21, 2010

pre algebra
With a mean of 72, and SD of 10 of High temprature: Temprature of 93 is how many SD above mean? Temprature of 54 is how many SD below mean? Show your calculations.
June 20, 2010

Statistics
Dont know
June 20, 2010

Maths 3u trig
If sinA = 1/3 and cosA<0 find the exact value of tan2A
June 19, 2010

eng
Can you please revise my first part of my paper. thanks Is his 1958 novel, “Things Fall Apart”, Chinua Achebe embraces his African culture with all its imperfections, he depicts the African Ibo clan’s beliefs and customs from an African perspective point of view...
June 15, 2010

geometry
In triangle abc, point B is on segment ab, and point E is on segment bc such that segment de is parallel to segment ac if db=2, da=7, de=3, what is the length of segment ac?
June 12, 2010

trig
Find the focus, directrix and axis of the parabola with equation x= 2y^2+3? Thank you for helping me!
June 8, 2010

Managerial Accounting
Which of the following is a characteristic of ABC? 1. improved financial reporting 2. aid to managers in determining product cost 3. used in place of job or process costing 4. use restricted to manufacturing entities
June 1, 2010

Managerial Accounting
Which of the following is not a benefit of implementing ABC:? 1. more accurate cost assignments 2. better cost control 3. cheaper to implement 4. more efficient operations 5. all of the above
June 1, 2010

chemistry
I'm starting to learn about colligative properties and i want to know if there are different equations for boiling point elevation and freezing point depression? In the book they give me the equation: (delta)Tb= Kb times molality. But my teacher gave us: delta Tb = Kb ...
June 1, 2010

Chemistry
What pressure will be exerted by each of the gases in the following mixture if the total pressure of the mixture amounts to 768.8 torr? 0.500 g of hydrogen; 0.245 g of oxygen; 0.335 g of nitrogen. What do I need to do??
May 27, 2010

algebra
if one card is selected at random from a standard deck of 52 cards, what is the probability of choosing a black card or a king?
May 23, 2010

algebra
Which of the following ia equivalent to the expression (t^2-t-6)(t-3)^-1? a. t^3-9t+18 b. (t-2)(t+3) c. (t+2)(t-3) d. (t-2) e. (t+2) The correct answer is e, however, I cannot figure out how to work the problem out to get that answer. Can you show me how to work this out ...
May 23, 2010

pre-cal
solve this system of equation 3x-y+5z-2w=-44 x+6y+4z-w=1 5x-y+z+3w=-15 4y-z-8w=58
May 5, 2010

chemistry
explain how you would make the following solution. You should tell how many grams of the substance you need to make the solution, not how many moles. 2L of 6M HCl
May 5, 2010

chemistry!
I just pick any? Don't I have to put 3.0 L in the equation?
May 4, 2010

chemistry!
An ideal gas has a volume of 3.0 L. If the number of moles of gas and the temperature are doubled, while the pressure remains constant, what is the new volume?
May 4, 2010

algebra
Two questions actually. Please only respond with step-by-step answers. Feel free to change the numbers, I just need to know how to do it... 1.) Factor Completely: 4a^2 + 81 - 36a 2.) In a right triangle, find the length of the side not given. b= 2 c= sqrt. 13
May 2, 2010

math
seven more that some number equals twenty one
April 29, 2010

math
seven more that some number equals twenty one
April 29, 2010

physics
You are holding a shopping basket at the grocery store with two 0.68- cartons of cereal at the left end of the basket. The basket is 0.80 long. Where should you place a 1.8- half gallon of milk, relative to the left end of the basket, so that the center of mass of your ...
April 28, 2010

Science Fair
What's the cheapest wind turbuine that will create 356965 kwh a year. PLEASE REPLY
April 27, 2010

Biology
when there is a deleterious (harmful) mutation in the gene coding for the protein 6-phosphofructokinase, muscle type
April 25, 2010

spanish
The waiter informs about your problems
April 24, 2010

Statistics
The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the nearest $100. Years ...
April 24, 2010

Fianacial Management in Health Care Organizations
the formula is used was $5000(1+r)^n
April 16, 2010

algebra
in graphing quadratic functions what are the ordered pairs for y=x*x+2
April 15, 2010

chemistry
Is anyone know the molecular weight of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone. i can't find it . Thanks
April 12, 2010

physics
Two charges seperated by 1 meter exert a 1 N force on eachother. If the magnitude of each charge is doubled, the force on each charge is?
April 10, 2010

Science
Waste created by man can be classified under Heading X (eg torn book, mouldy bread, rotten apple) and Heading Y (plastic bag, biscuit tin, broken bulb). What is Heading X and Heading Y?
April 6, 2010

Geometry
I have a project due this week and I have to make a board game, so I need 15 questions about right triangles. I already have about 7, so is there a website with some examples? This is 10th grade geometry.
April 5, 2010

Chemistry
A 0.490 M solution of an unknown monoprotic weak acid, HA, is 2.80% ionized. What is the value of Ka for HA?
April 5, 2010

Chemistry
If 27.5 mL of 5.7 multiplied by 10-2 M HNO3 is added to 20.0 mL of 2.2 multiplied by 10-2 M HNO3, what is the pH of the solution?
April 5, 2010

BIO100
Post a 200- to 300-word response to the following: In your own words, summarize each of the major theories of biology. Choose one theory and provide an example of how this theory relates to the news today. Use at least one outside reference in addition to your text. Use APA ...
March 31, 2010

CALCULUS
thank u sooo much
March 30, 2010

CALCULUS
gardner wishes to encloe a rectangular 3000 square feet area with bushes on three sides and a fence on the 4th side .If the bushes cost $25.00per foot and the fence costs $10.00 per foot, find the dimensions that minimize the total cost and find the minimum cost
March 30, 2010

Definiton
Define: Provincial Government Can someone help me?
March 30, 2010

accounting
Deane Company issues $5 million, 10-year, 9% bonds at 96, with interest payable on July 1 and January 1.The straight-line method is used to amortize bond discount. Prepare the journal entry to record interest expense and bond discount amortization on July 1, 2008, assuming no ...
March 29, 2010

Spanish
What is the 12 calzones?
March 26, 2010

Chemistry
Hi I just need help with question (ii) and (iii), i know how to work out (i) A solution is prepared by dissolving 0.2222 (±0.0002) g of KIO3 in 50.00 (±0.05) mL (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of ...
March 26, 2010

Science
If the sun is in the center of the constellation Sagittarius on January 10, what time would the sun rise and what time would it set? Need an answer!!!!!
March 26, 2010

Science
If the sun is in the center of the constellation Sagittarius on January 10, what time would the sun rise and what time would it set? Need an answer!!!!!
March 26, 2010

Calculus II
I have a function RC * dvout/dt + vout = RIin and the initial condition vout(1) = 0 for t = 0 to 7.5. When I set up the equation to be solved using Euler's method, is it: vout = vout + f(vout,t)*step size, with f(vout,t) = (RIin - vout)/RC.
March 24, 2010

chemistry
Determine Kc at 298 K for the reaction 2 CH4(g) reverse reaction arrow C2H2(g) + 3 H2(g), given the following data at 298 K. (Hint: How are Kc and Kp for the reaction related?) CH4(g) + H2O(g) reverse reaction arrow CO(g) + 3 H2(g) Kp = 1.2 multiplied by 10-25 2 C2H2(g) + 3 O2...
March 24, 2010

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