Friday
October 24, 2014

Posts by Rachael


Total # Posts: 150

Physics
A stunt pilot is attempting to drop a water balloon from a moving airplane onto a target on the ground. The plane moves at a speed of 82.8 m/s and a 49° above the horizontal when the balloon is released. At the point of release, the plane is at an altitude of 700 m. At the...
October 7, 2014

Managerial Economics
Why the cost structure associated with many kinds of information goods and services might imply a market supplied by a small number of large firms.
February 15, 2014

chemistry
Calculate the pH for each of the following cases in the titration of 25.0 mL of 0.180 M pyridine, C5H5N(aq) with 0.180 M HBr(aq): 1)before addition of any HBr 2)after addition of 12.5 ml of HBr: 3)after addition of 16 ml of HBr: 4)after addition of 25 ml of HBr: 5)after ...
February 6, 2014

everest
What number is 45% of 680
November 12, 2013

math
B independent
September 21, 2013

math
A researcher was interested in the emotional effects of music on exam performance. Before their exam, a professor took one group of students into a room in which calming music was played. A different group of students were taken to another room in which new wave hard rock was ...
September 21, 2013

Math
Suppose that the service rate to a waiting line system is 10 customers per hour (exponentially distributed). Analyze how the average waiting time is expected to change as the arrival rate varies from two to ten customers per hour (exponentially distributed)
September 14, 2013

math
Four key marketing decision variables are price (P), advertising (A), transportation (T), and product quality (Q), Consumer demand (D) is influenced by these variables. The simpiest model for decribing demand in terms of these variables is: D = k - pP + aA + tT + qQ, where k, ...
September 7, 2013

math
If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,000 items are defective, find the upper and lower control limits for a -chart.
August 31, 2013

math
If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,000 items are defective, find the upper and lower control limits for a p-chart.
August 31, 2013

math
In developing a multiple linear regression model in excel. How do I find the x and Y inputs. How do I find a 95% confidence interval for the mean market value for houses that are 30 years old and have 1,800 sq ft, and 95% prediction interval for a house that is 30 years old ...
August 25, 2013

math
Consider the experiment of drawing two cards from a deck in which all pictures cards have been removed and adding their values (with ace =1). A. Describe the outcomes of this experiment. List the elements of the sample space. B. What is the probability of obtaining a total of ...
August 18, 2013

math
Consider the experiment of drawing two cards from a deck in which all pictures cards have been removed and adding their values (with ace = 1). A. Describe the outcomes of this experiment. List the elements of the sample space. B. What is the probability of obtaining a total of...
August 17, 2013

Math
Liked your answer, did not see it the first time, thanks!
August 17, 2013

Math
Consider the experiment of drawing two cards from a deck in which all picture cards have been removed and adding their values (with ace = 1). A. Describe the outcomes of this experiment. List the elements of the sample space. B. What is the probabilit of obtaining a total of 5...
August 17, 2013

algebra 3
identify the greatest common factor then factor expression x^2+9x+47
August 13, 2013

Calculus
If F(x)=x^3−7x+5, use the limit definition of the derivative to find FŒ(5), then find an equation of the tangent line to the curve y=x^3−7x+5 at the point (5, 95). FŒ(5)= The equation of the tangent line is y = x + . Check your answer for ...
June 9, 2013

algebra
If the opposite of x is -x, then their sum is 0, however, if the opposite of x is 1/x, then their sum is (x+1)/x
April 23, 2013

Social Stuides
wat?
April 23, 2013

Social Stuides
The People's Party grew out of a response to falling cotton & wheat prices in the South & trans-Mississippi West. The Farmers' Alliance, formed in TX in 1876, promoted collective economic action by farmers.
April 23, 2013

chemistry
concentrated sulfuric acid is typically 18.1 M H2 SO4. Calculate the volume in mL of concentrated sulfuric acid needed to prepare 125 mL of a 0.100 M H2SO 4 solution
April 23, 2013

physics
Electric field at a distance r from a charge q is given by Coulomb's law: E = k q / r^2 To get the E-field, you have to add the contribution of 3 charges: E1 = k q1 / r1^2 E2 = k q2 / r2^2 E3 = k q3 / r3^2 You can look at the geometry and so simple addition and subtraction...
April 23, 2013

maths
Given the the instantaneous voltage across a capacitor is VC=40(1-e -t/CR) Volts When being charged by a 40 volt DC supply, find the time, t for VC to reach 18 volts after the charging process has started if C = 100ìF and R = 20kÙ
March 22, 2013

AP Calculus
Two ships sail from the same port. The first ship leaves port at 1:00a, and travels eastward at a rate of 15 knots. the second ship leave port at 2:00am and travels northward at a rate of 10 knots. Determine the rate at which the ships are separating at 3:00am
January 18, 2013

chemistry
How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
September 27, 2012

chemistry
How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
September 27, 2012

Stats
A class of 85 students writing an exam had a mean mark of 74.2 write down the total sum of the 85 grades.
September 26, 2012

UOP RES 342
Use the numerical data from one of the data sets provided. · Develop one business research question from which you will formulate a research hypothesis that will test two or more populations. · Prepare a 250 word paper describing the results of a hypothesis test ...
July 15, 2012

physics
"A cab driver picks up a customer and delivers her 3.31 km away, driving a straight route. The driver accelerates to the speed limit and, upon reaching it, begins to decelerate immediately. The magnitude of the deceleration is 4.70 times the magnitude of the acceleration...
June 1, 2012

Chemistry
Given that the specific heat capacities of ice and steam are 2.06 J/g degrees celsius, respectively, and considering the information about water given in exercise 16, calculate the total quantity of heat evolved when 10.0g of steam at 200. degrees celsius is condensed, cooled...
April 16, 2012

PHYSICAL SCIENCE PLEASE HELP REALLY APPRECIATE IT!
Thank You So Much! ^_^
December 14, 2011

PHYSICAL SCIENCE PLEASE HELP REALLY APPRECIATE IT!
In the reaction between bromine and sodium, a bromine atom gains an electron. What ion is formed? Is the bromine oxidized, or is it reduced? Thank You ^_^
December 14, 2011

physics
A block is released on an inclined plane from a height of 1m. There is friction (static and kinetic =.4) and the mass of the block is 5 kg, the mass of the pulley is 1 kg and it has a radius of 5 cm. The slope of the incline is 30 degrees. Find the acceleration of the block as...
November 18, 2011

Grammar
Actually, #1,#2, and #4 are correct. Just took this test a few minutes ago...
November 8, 2011

Grammar
Actually #2 is correct. Just took this y test.
November 8, 2011

algebra 1
N decreased by 12 is greater than or equal to 11?
October 19, 2011

algebra 1
N decreased by 12 is greater than or equal to 11?
October 19, 2011

Physics
A football is punted up into the air and it lands 5 seconds later. How high did the did the football reach it's highest point and when does it reach this height?
October 3, 2011

College Geometry
A circular grassy region with a 12 ft diameter has a 2ft by 3ft reflecting pool in its center. What is the Surface Area of the reflecting pool? What is the Area if the grass?
September 11, 2011

economics
1. Pick a business that you are familiar with and list three (3) fixed and (3) variable inputs associated with that business. 2. What are some things that you think that business could do to reduce their costs? Why?
July 25, 2011

Chemistry
Identify the acid or base behavior of each substance in this reaction: H2PO4 + H2O <----> H3O+ + HPO4-
May 11, 2011

Chemistry
Show that the pH of a solution is -0.301 when its hydronium-ion concentration equals 2 M. Is the solution acidic or basic?
May 10, 2011

Ethics
what measurements do sociologists utilize to calculate prejudice
May 1, 2011

trig
solve each equation for 0 less than or equal to x greater than 2ð. cot²x-cscx=1 thanks:) step by step please :)
March 9, 2011

Chemistry
The Ka value for ethanoic acid is 1.8x10^-5, what would be the pH of a 2.0x10^-2 M solution of ethanoic acid?
February 27, 2011

Chemistry
The Ka value for ethanoic acid is 1.8x10^-5, what would be the pH of a 2.0x10^-2 M solution of ethanoic acid?
February 27, 2011

science
which chromosome is breast cancer located on?
January 30, 2011

Chemistry
The question is: Hydrogen and oxygen gas combine explosively to produce water. Write a balanced chemical equation for this process. If 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced? Is this right for the balanced equation? 4H + O₂...
January 15, 2011

Chemistry
The question is: Isotonic saline is a 0.9% (g/100ml) solution of salty water. You are asked to make up 2L of isotonic saline. How much salt should you weigh out? I got the answer of 18g with the following working: 9 ÷ 1000(ml) x 100 = 0.9 Therefore 9% of 1000ml (1L) is ...
January 15, 2011

math
A helicopter is 400 miles directly north of Ghana and is flying at 20 miles per hour. A second helicopter is 300 miles east of Ghana and is flying west at 15 mph. What is the rate of change of the distance between the helicopters?
December 30, 2010

10th grade
48
October 17, 2010

algebra
Is the relation y> the absolute value of x+3 a function? Why?
September 25, 2010

math
TUESDAY
June 21, 2010

algebra
How do i compute the track of two circles one with a diameter of 100 feet, the other with a diameter of 200 feet? The question asks me to compute the length of the track with these two circles touching each other at a single point.
June 2, 2010

arithmetic
cross sectional area*length
May 19, 2010

math
The height, in feet, of a free-falling object t seconds after being dropped from an initial height s can be found using the function h = -16t2 + s. An object is dropped from a helicopter 784 feet above the ground. How long will it take the object to land on the ground?
May 16, 2010

arithmetic
1/4*3=3/4
May 7, 2010

reading
What is an appositive?
April 22, 2010

6th grade math HELP
You have a triangle that measures 180 degrees. AB is 4 units. the measure of BC is 5 units. The measure of CD is 12 units. What is the measure of DE and how did you get that answer?
April 18, 2010

6th grade
The measure of AB is 4 units, the measure of BC is 5 units and the measure of CD is 12 units. Find the measure of DE?
April 15, 2010

math
12
April 15, 2010

math
the answer is 12
April 15, 2010

Arithmetic
1 litre per bottle
April 12, 2010

chemistry
The Burning MG in CO2 reaaction had deltaG=-746 kJ/mol at 298K. Calculate the equilibrium constant for this reaction.
March 6, 2010

arithmetic
1/4
February 22, 2010

HCA/220
need help writing a soap note with five medical words out of chapters 6,7,8
February 16, 2010

math
Suppose that the multiplication and division keys on your calculator were broken. Explain how you can calculate 452 x14 by using other keys on the calculator.
February 11, 2010

Physics
Two young sisters with a combined mass of 75 kg ride on a cart of mass 30.0kg travelling at 2.0 m/s. If they jump off together so they land with zero speed relative to the ground, what is the change in speed of the cart?
January 17, 2010

Investigation
Conduction, convection, or radiation? The heat yuo feel from a fireplace
January 11, 2010

arithmetic
3/8
December 9, 2009

spanish
How do i say i dont like history?
November 19, 2009

arithmetic
20
November 16, 2009

math
53
November 11, 2009

english
What are the adjectives in each of the following: 1. A quarter will not buy very much. 2. Do you need any food for the party?
October 28, 2009

arithmetic
2.911
October 8, 2009

Social Studies
Who were the first Native American groups to settle in Ottawa, Illinois? Where did they come from? What kind of people were they?
October 5, 2009

arithmetic
Steves mom is 47 and Steve is 18
September 30, 2009

Math
first number is 910/39,the second one is 3601/13and the third one is 2/3
September 24, 2009

arithmetic
7/16
September 22, 2009

arithmetic
100
August 6, 2009

math
72
August 1, 2009

arithmetic
1.423760 2.4 years
May 6, 2009

arithmetic
423760
May 6, 2009

Art history
what are the major connections between the ashcan schools ethics and todays documentary photogrphers such as nan godin and corrine day?
February 2, 2009

yr8 geography
not much help but thanks for helping
February 2, 2009

yr8 geography
my homework assignment is to colour the tributary of the river tees but i am struggling. i don`t know where to colour. please help
February 2, 2009

alegebra
a stone is thrown into a cylindrical water tank 2 feet in diameter, causing it to rise 1.5 inches. what is the volume of the stone?
January 14, 2009

english
Why, you're welcome. Tell me what you come up with and then I'll still help you.
December 12, 2008

english
Go to google and type in two opposing arguments about tattoos. Then keep scrolling down until you reach the bottom. Then click that. You can read all about that. It may help out.
December 12, 2008

Math
Thanks
December 12, 2008

Math
What are the 3 numbers that com after trillion. I'm talk about this- Ex: million then billion. I want to know what comes after trillion 3 times.
December 12, 2008

Math
Hahaha!!! oh know! what am i gonna do??
December 11, 2008

math
lkeruosehgnvshfdsjfkljurfeoiwajrtknfdn vjeoipajrsekaf
December 11, 2008

math
What??
December 11, 2008

math
yups it was! lol
December 11, 2008

math
lmfao. i was kdding. that was hilarious
December 11, 2008

math
8+2=400
December 11, 2008

Math
lol.
December 11, 2008

Math
thanks
December 11, 2008

Math
Two cats are taking a walk. 1 cat runs off. three cats come back. 1 cat sits down. How many cats in all are there if 6 more cats came back with one of the cats being the one that ran off?
December 11, 2008

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