Posts by shelley
Total # Posts: 57
A 19-liter mixture consists by volume of 1 part juice to 18 parts water. If x liters of juice and y liters of water are added to this mixture to make a 54-liter mixture consisting by volume of 1 part juice to 2 parts water, what is the value of x?
January 26, 2016
a) weight in N = 72.2 x (9.8+1.53) = 818N b) weight in N = 72.2 x 9.8 = 708N c) weight in N = 72.2 x (9.8-1.44) = 604N you multiply the mass by gravity +/- the acceleration depending on if the elevator is moving upwards or downwards.
August 12, 2015
I believe that it would be that man has "evolved" into having to rely more on technology for a means of communication. If today's man were forced into a society without cell phones, computers, electricity, or means of gas powered modes of transportation, they ...
October 14, 2014
Victor needs to calculate the number of miles per gallon his car averages. His car's gas tank holds 15 gallons of gas. Write an equation that will help him determine the average number of miles his car gets per gallon of gas.
July 14, 2014
Jane Smith currently holds tax-exempt bonds of Good Samaritan Healthcare that pay 7 percent interest. She is in the 49 percent tax bracket. Her broker wants her to buy some Beverly Enterprises taxable bonds that will be issued next week. With all else the same, what rate must ...
June 10, 2013
Maximize P= 8x1+12x2 Subject to 2x1+4x2<=24 3x1+3x2<=21 4x1+2x2<=20 X1, x2 => 0 Using the SIMPLEX method. Clearly state the row operations used. For each tableau used, complete the leftmost column by providing the appropriate basic variables.
May 7, 2013
Kari Popper advocates, as a more efficient way to examine a scientific hypothesis, which of the following? A) Gather as much data as possible supporting the hypothesis. B) Fake the data C) Try to show the hypothesis is false. D) Meditate on what the hypothesis really means. ...
May 15, 2012
Operations Management 10th edition
The three station work cell illustrated in Figure S7.7, has a product that must go through one of the two machines at station 1 (they are parallel) before proceeding to station 2. Station 1-Machine A-Capacity: 20 units/hr Station 2-Capacity: 5 units/ Station 3-Capacity: 12 ...
April 25, 2012
A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution that is 8.5 × 10-4 M. 6.60 mL of iodine solution is required to reach the endpoint. 1. How ...
March 12, 2012
I need a poem that contains at least six of the poetic devices listed below: simile metaphor personification onomatopoeia alliteration rhyme rhythm rhyme scheme repetition I need this poem before 7 pm tonight, because my assignment is due tomorrow.
May 15, 2011
A company employs 10 people and plans to select a group of 4 of these employees to receive advanced training. How many ways can the group of four employees be selected? I thought this would be rather simple and I am completely stuck.. Any help with a formula would be much ...
April 30, 2011
Spanish-7th grade-Please check
I use spanishtypeit to do accents so I just said after phrase where I would have put the accent mark-thank you for checking 1.¿Cuál es tu deporte favorito? Mi deporte favorito es al golf. 2..¿Te gusta navegar en el internet? Si, me gusta navegar en el ...
March 27, 2011
I posted this response under your answer but I thought I would repeat it here just in case you didn't look back at the other one. I really appreciate you helping. When you go to science geek, you have to type in Shockwave/Titration to get the experiment. Now, according to ...
May 12, 2010
The web site for sciencegeek -you need to type in Shockwave/Titration after sceiencegeek So when I take the volume of base times the moles of base and divided by volume of acid, that gives me the [H+] of the acid, correct?
May 12, 2010
My teacher has us doing a virtual Titration lab on sciencegeek site but never demonstrated a Titration Lab so I really don't undestand it. We have to identify five unknown acids according to how much [H+} of acid is in each solution. We had the choice of adding NAOH in ...
May 12, 2010
25.00 mL of an acetic acid solution requires 23.86mL of a 0.1550M potassium hydroxide solution to reach the end point. What is the molarity of the acetic acid solution? (Hint: write the chemical reaction, and remember stoichiometry)
April 6, 2010
Mirks labs is a British pharmaceutical company that currently enjoys a patent monopoly in Europe, Canada and the United States, on Zatab (pronounced zay-tab), an allergy medication. The global demand for Zatab is Qd = 15.0-0.2P Where Qd is annual quantity demanded (in millions...
February 18, 2010
I cannot figure this out I keep getting the order pair(1.24,-3.44), but it does not work when I check. Can you help me? 5x+5y=-11 7x-3y=19 The other oneI needed to solve is this Question: 4y+3y<-35 I got -5>-35...is that right?
December 20, 2009
If you sent out 5000 census to households and 3700 answered would my percenatge be 1.35%. please tell me if i answered this corrrectly I took the 5000 and divided it with the 3700 and I received the answer of 1.35% Please help thanks Shelley.
September 16, 2009
I turn polar bears white And I will make you cry. I make guys have to pee And girls comb their hair. I make celebrities look stupid And normal people look like celebrities. I turn pancakes brown And make your champane bubble. If you sqeeze me, I'll pop. If you look at me, ...
November 19, 2007
What kinds of unwanted reactions might you get from readers of your messages? What steps would you take to ensure that the purpose of your message (whether informative, negative, or persuasive) is conveyed to your readers? As asked and answered previously: http://www.jiskha....
July 30, 2007
Determine the volume of oxygen that is needed at STP to completely react with 5.63 g of potassium. 4K + O2 yields 2H2O I don't buy the equation. If K is reacting with oxygen, then the equation is 4K + O2 ==> 2K2O Actually, I think it forms K2O2. Do you have any ...
March 19, 2007
Hello! I have a problem on volumes but I am having trouble visualizing the object. y=ln(x), y=1, y=2, x=0, about the y-axis For the graph, I graphed y=ln(x), then I have from 1 to 2. Is this one with a washer where I have integral fom 1 to 2 of pi*ln(x)^2 - pi* something? I...
February 10, 2007
We're doing areas by integrals now, with 2 eqns. I have a few questions. 1. Sketch the region in the xy-plane defined by the inequalities x-2(y^2)> 0 and 1-x-abs(y)>0. and find its area. Would it be best to solve for x, then graph it as x= something? Then find the ...
February 8, 2007
in the equation w= fd it is assumed that the force varies and is exerted in the direction of displacement... true or false? Yes. Force is measured in the direction of displacement.
February 7, 2007
Calculus - Integration
Hello! I really don't think I am understanding my calc hw. Please help me fix my errors. Thank you! 1. integral from 0 to pi/4 of (tanx^2)(secx^4)dx It says u = tan x to substitute So if I use u = tan x, then my du = secx^2 then I have integral of (u^2) then (1/3)u^3........
January 29, 2007
Hello, I have some calculus homework that I can't seem to get started..at least not on the right track? I have 3 questions 1. integral of [(p^5)*(lnp)dp] I'm using the uv-integral v du formula So first, I'm finding u and I think it's lnp.......so du is 1/p Then...
January 23, 2007
Hello Everyone, I need help with Calc II. 1. Integral from 0 to 1 of (sin(3*pi*t))dt For this one, I got -1/3pi cos (9 pi^2) + 1/3pi 2. indefinite integral of sinxcos(cosx)dx I got sin(cosx) + C 3. Indefinite integral of x over (root (1-x^4))dx I don't know how to solve ...
January 22, 2007