Wednesday

January 28, 2015

January 28, 2015

Total # Posts: 501

**Statistics **

DM Co. sells computer parts by mail. The company claims that at least 90% of all orders are delivered on time. A sample of 150 orders showed that 129 were mailed on time. Is the company’s claim true? Test using the 2.5% level of significance. Use the 5 step procedure.
*March 28, 2013*

**Statistics **

A hospital claims that the mean waiting time at its emergency room is 25 minutes. A random sample of 16 patients produced a mean wait time of 27.5 minutes with a standard deviation of 4.8 minutes. Use the 1% level of significance to test is the wait time is different from 25 ...
*March 28, 2013*

**Algebra**

As x ranges over all real values, what is the minimum value of f(x)=|x-123|+|x-456| + |x-789| ?
*March 27, 2013*

**algebra**

Find the sum of all positive integers b such that b^2=a^3+1, where a is a prime number.
*March 27, 2013*

**Algebra**

If a, b and c are non-zero reals such that a + b + c = 11 and \frac {1}{a} + \frac {1}{b} +\frac {1}{c} = 0, what is the value of a^2 + b^2 + c^2?
*March 27, 2013*

**Calculus**

The volume of the 3-dimensional structure formed by rotating the circle x^2 + (y-5)^2 = 1 around the x-axis can be expressed as V = a\pi^2. What is the value of a?
*March 26, 2013*

**Trigonometry**

If \cot \left(\sin^{-1} \frac{1}{5}\right) = m, what is the value of m^2?
*March 26, 2013*

**home work**

The ball is throw in to the air . If its height in feet is given by - 16t^2 + 64t, at what time t will the ball reach a height of 64 feet?
*March 25, 2013*

**Statistics **

A company that manufactures exercise machines wanted to know the percentage of large companies that provides on-site health club facilities. A sample of 240 such companies showed that 96 of them provide such facilities on site. a. What is the point estimate of the percentage ...
*March 10, 2013*

**Statistics **

A company that manufactures exercise machines wanted to know the percentage of large companies that provides on-site health club facilities. A sample of 240 such companies showed that 96 of them provide such facilities on site. a. What is the point estimate of the percentage ...
*March 4, 2013*

**geometry **

38ft rope extended to end gives 70°angle of elevation what is height
*March 3, 2013*

**Statistics**

Suppose that 7.6% of all people are allergic to the H1N1 vaccine. A sample of 517 people are selected a. Calculate the probability that less than 8% of the sample will be allergic to vaccine.
*March 3, 2013*

**business**

$72,000
*March 1, 2013*

**statistics**

.31
*February 25, 2013*

**Statistics**

Cola Corporation produces Orange Cola. The filling machines are adjusted to pour 12 ounces of soda into each 12-ounce can. However, the actual amount of soda poured into each can is not exactly 12 ounces; it varies from can to can. It has been observed that the net amount of ...
*February 19, 2013*

**Statistics**

Cola Corporation produces Orange Cola. The filling machines are adjusted to pour 12 ounces of soda into each 12-ounce can. However, the actual amount of soda poured into each can is not exactly 12 ounces; it varies from can to can. It has been observed that the net amount of ...
*February 19, 2013*

**Statistics **

Each of 4 people is presented with gourmet coffee and ordinary coffee and asked to identify the gourmet coffee. None of the 4 can really tell the difference and are merely guessing. a. What is the probability that exactly 2 of the 4 correctly identify the gourmet coffee? b. ...
*February 11, 2013*

**Statistics **

Each of 4 people is presented with gourmet coffee and ordinary coffee and asked to identify the gourmet coffee. None of the 4 can really tell the difference and are merely guessing. a.What is the probability that exactly 2 of the 4 correctly identify the gourmet coffee? b.What...
*February 11, 2013*

**Statistics **

Each of 4 people is presented with gourmet coffee and ordinary coffee and asked to identify the gourmet coffee. None of the 4 can really tell the difference and are merely guessing. a.What is the probability that exactly 2 of the 4 correctly identify the gourmet coffee? b.What...
*February 11, 2013*

**algebra**

Can someone please help me solve (2f^2 g^3) ----------- 4 (3fg) posed to be a fraction bar with the four on the outside of the ()
*February 10, 2013*

**Algeba - Math**

A truck rental company offers two plans. One rental plan is $78 per day and $.12 per mile driven. Te other truck plan offers no daily fee but it is $.36 per mile driven. Determine the number of miles that must be driven in one day for the cost to be the same.
*February 7, 2013*

**Statistics-Probability**

An instructor will choose 3 problems from a set of 7 containing 3 hard and 4 easy problems. If the selection is made at random, what is the probability that only the hard problems are chosen?
*February 5, 2013*

**math**

Write it out
*January 10, 2013*

**Physics**

A 25.2-kg object is moving rightward across a horizontal surface with a speed of 14.3 m/s The coefficient of friction between the object and the surface is 0.490.
*January 10, 2013*

**Math**

68/4= 17 (one side of square) area of square is the side^2 Answer:289 cm^2
*January 10, 2013*

**Math**

plug 3 in for y 4x+2(3)=22 4x+6 =22 -6 -6 4x =16 ----------- 4 4 x = 4 Final Answer D; x=4 hope this helped
*January 10, 2013*

**Math**

you need to plug the x value in the coordinate in to see if you get the coresponding y value Answer is A becuse: 3(0)-1 = -1 3(2)-1 = 5 3(5)-1 = 14
*January 10, 2013*

**Math**

.3048 * 2 = .6096m/min then multiply by 60 to get into hours Final Answer: 36.576 meters/hour
*January 10, 2013*

**math algebra 1**

divide everything by 6 , 3 min 6 seconds
*January 10, 2013*

**Geometry PLEASE HELP ME**

ABC has vertices A(0, 6), B(4, 6), and C(1, 3). Sketch a graph of ABC and use it to find the orthocenter of ABC. Then list the steps you took to find the orthocenter, including any necessary points or slopes you had to derive.
*December 11, 2012*

**Geometry PLEASE HELP ME**

What is the range of possible values for x? The diagram is not to scale. Quadrilateral ABCD with diagonal from vertex B to vertex D. Sides AB and BC are congruent. Side AD is 22 units. Side DC is 30 units. The measure of angle ABD is given by 2x. The measure of DBC is 34 ...
*December 11, 2012*

**French**

Bonjour, Voici la réponse à tes questions 1) un ventillateur 2) le maillot de bain 3) un "dessus de lit" chaud 4) dans la bibliothèque 5) Dans l'armoire 6) des rideaux 7) Dans la salle de bain, dessus le lavabo 8) une gazinière
*December 4, 2012*

**Math (Calculus)**

At 2:00 pm boat K is 25 km north of boat L. If boat K is sailing 5 km/h west and boat L is sailing north at 20 km/h, what is the rate at which the distance between the two boats in changing at 2:30?
*November 4, 2012*

**Calculus**

f(x)=(1/3)x–4 on the interval [2,9]. The domain of the inverse function is the interval [A,B] where A=? and B=?
*November 1, 2012*

**accounting**

The monetary contributions that the owners of IBM pay for shares of the company's stock are ____ resources for IBM. a. material b. financial c. human d. informational e. manufacturing Patents and copyrights confer value on a firm but do not exist physically. Thus, they are...
*October 29, 2012*

**Math**

There are 285 7 th graders there are 19 more girls than boys what are the totals for each
*October 28, 2012*

**Math Calculus 2**

At a certain instant an aircraft flying due east at 240 miles per hour passes directly over a car traveling due southeast at 60 miles per hour on a straight, level road. If the aircraft is flying at an altitude of .5mile, how fast is the distance between the aircraft and the ...
*October 22, 2012*

**Chemistry**

In an exothermic reaction, is the heat of the reation less than, greater than, or equal to zero? In an endothermic reaction, is the heat of reaction less than, greater than, or equal to zero?
*October 16, 2012*

**Algebra**

If you drive for 2 hours at 80 mph, how fast must you drive during the next hour in order to have an average speed of 75 mph?
*October 8, 2012*

**Algebra**

A farm stand owner mixes apple juice and cranberry juice. How much should he charge if he mixes 8 L of apple juice selling for .45/L with 10 L of cranberry juice selling for $1.08/L?
*October 8, 2012*

**Algebra**

A chemist has 40 ml of a solution that is 50% acid. How much water should be added to make a solution that is 10% acid?
*October 8, 2012*

**Math**

A large company has a private computer network connecting 300 different sites. Each site is connected to the network independently with a switch that fails with probability 1% on any given day. 1. What is the probability that exactly two of 300 sites lose their network ...
*October 1, 2012*

**chemistry**

Prepare 1.5 liters of 0.25 M Tris buffer, pH 7.5. Useful information: pKa Tris = 8.1 Formula weight of Tris (hydroxymethyl aminomethane) base = 121.1 Formula weight of Tris hydrochloride (acid form) = 158.0
*September 26, 2012*

**chemistry**

first task is to prepare 250 ml of 3 M glucose. Then You are preparing a solution and the recipe calls for 25 ml of 10% glucose. How much of the 3M glucose stock would you need to add to so that you are adding the same molar amount of glucose?
*September 25, 2012*

**chemistry**

Prepare 150 ml of a reaction buffer containing 0.75% MgCl2, 35mM glucose, 750 nM ATP, and 20 mM Tris-Cl, pH 7.5. In addition, you have a 20% MgCl2 stock solution and the lab freezer has 10 mM ATP that you can dilute to the correct concentration.
*September 25, 2012*

**chemistry**

How would you prepare 500 ml of a 1.8 M phosphate buffer (pH 6.8) containing 4.5 x 10-6 M CaCl2 and 52 mM sucrose?
*September 25, 2012*

**math investment**

8. (TCO A) You can tax shelter only one-half of your retirement savings. You want to invest one-half of your savings in bonds and one-half in stocks. How much of the bonds and how much of the stocks should you allocate to the tax sheltered investment? (Points : 5) ...
*August 9, 2012*

**math**

3. (TCO A) The following questions are worth 5 points each. Please show all work. a. Inflation is expected to average five percent for the long term and Mr. Smith earned $74,000 this year, how much must he earn in 20 years just to keep up with inflation and maintain the ...
*August 5, 2012*

**math**

Joe is purchasing a new truck for $30,000. Joe is making a $2,000 down payment, and he will make 60 monthly payments of $541 each. What are the total finance costs on this loan?
*August 5, 2012*

**math**

Leslie has been offered the choice of either a $1,000 rebate or a 5.5 percent, 48-month loan for the new car she is purchasing. If Leslie will be financing $15,000 and she can get a 7.5 percent, 48-month loan at her credit union, should she take the $1,000 rebate or the 5.5 ...
*August 5, 2012*

**Accounting**

If a client asks me to do a balance sheet for a given month, but they put a question mark beside Truck and Accounts Payable in the assests column..can I even do the balance sheet since these are part of the assests?
*July 1, 2012*

**algebra**

A company produces doll houses and sets of doll furniture. The doll houses take 3 hours of labor to produce, and the furniture sets take 8 hours. The labor available is limited to 400 hours per week, and the total production capacity is 100 items per week. Existing orders ...
*June 20, 2012*

**algebra**

The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 28 in., find the width of the rectangle.
*June 20, 2012*

**algebra**

Adult tickets for a play cost $16 and child tickets cost $6. If there were 25 people at a performance and the theater collected $260 from ticket sales, how many adults and how many children attended the play?
*June 20, 2012*

**Mergers and Acquisitions**

Why did M & A activity decrease in the late 1980s and early 1990s? Why did M & A activity increase again in the latter part of the 1990s?
*June 17, 2012*

**Mergers and Acquisitions**

Define winner's curse in the context of M & As. How can the buying company avoid the pitfalls of the winner's curse?
*June 17, 2012*

**Mergers and Acquisitions**

List any three of the reasons why the firm would continue to exist beyond the point where its products have become obsolete.
*June 17, 2012*

**Mergers and Acquisitions**

How does goodwill (under FASB 141 R) impact cash flows of the combined entity? How do the 1993 tax law changes impact goodwill and the after tax cash flows of the combined entity after the M & A?
*June 17, 2012*

**Mergers and Acquisitions**

Fair value determination of goodwill and calculating the premium paid over market value in a merger: Using fair value accounting for goodwill, under FAS 141R, determine the amount of Goodwill that "the acquiring company" enters on its balance sheet in the following ...
*June 17, 2012*

**Mergers and Acquisitions**

List the three ways that tender offer legislation protects target company shareholders?
*June 17, 2012*

**Mergers and Acquisitions**

Define a horizontal merger. How can a horizontal merger produce synergy benefits?
*June 17, 2012*

**Physics**

To supply the plumbing system of a New York office building, water needs to be pumped to a tank on the roof, where its height will provide a "head" of pressure for all the floors. The vertical height between the basement pump and the level of the water in the tank is...
*June 15, 2012*

**chem**

At room temperature (25oC) and normal atmospheric pressure (760 torr), the average person’s lungs have a total capacity of about 5.5 liters. If a person takes a deep breath and then dives deep into a lake where the temperature is 19oC and a pressure of 915 torr, what will...
*May 25, 2012*

**Math 12**

A hard rubber ball is dropped from a moving van with a height of 5 metres. The ball rises to 80% of the previous height after each bounce. a) determine the total vertical distance the ball has traveled when it strikes the ground the eighth time. b) estimate the total vertical ...
*May 11, 2012*

**Biochemistry**

for mutation in glycogen metabolism. what happen if a) loss of the gene that encodes alpha 1,4 glucosidase b)loss of the gene that encodes Glucose-6-phosphatase in liver.
*April 25, 2012*

**Chemistry**

Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is plated out?
*April 16, 2012*

**Chemistry**

Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is plated out?
*April 16, 2012*

**Chemistry**

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}
*April 16, 2012*

**Chemistry**

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}
*April 16, 2012*

**math**

Salma's penny bank is 1/2 full. After she adds 360 pennies, it is 4/5 full. How many pennies can Salma's bank hold?
*March 30, 2012*

**Biochemistry**

please help 1. An uncharged solute (S) is transported by symport with H+. The Delta Psi is -120 mV and the Delta pH is 1. A) what is the expected Sin/Sout if the S:H+ symport ratio is 1:1? B)what is the expected Sin/Sout if the S:H+ symport ratio is 1:2? C)What would be the ...
*March 28, 2012*

**Chemistry**

what is the magnitude of delta for [Ti(H2O)6]3+ in kj/mol?
*March 26, 2012*

**Economics**

The market demand in a Bertrand duopoly is P = 15 - 4Q, and the marginal costs are $3. Fixed costs are zero for both firms. Which of the following statement(s) is/are true? a.P = $3. b.P = $10. c.P = $15. d.None of the statements associated with this question are correct.
*March 20, 2012*

**Chemistry**

My teacher gave us the answer to a chemistry problem and i cannot figure out how she got the answer. Can you help me work out this problem so i can better understand it. A gas under an initial pressure of 0.60atm is compressed at a constant temperature from 27L to 3.0L. The ...
*March 19, 2012*

**Chemistry**

Ok so i'm confused because T=273K is already in Kelvin.
*March 19, 2012*

**Chemistry**

what is the chemical equation of copper II oxide and carbon monoxide (include phases)?
*March 9, 2012*

**Chemistry**

Calculate the percent ionization of 0.120 M lactic acid (Ka=1.4*10^-4).
*March 2, 2012*

**Math**

For each point in a set of points, its distance from (-2,4) is three times its distance from the line x=6 1. find the equation 2. tell which conic section the graph will be.
*March 1, 2012*

**BCMB**

Can anyone please help me how to calculate the turnover number? The enzyme reaction shown was performed in a 10 ml volume with a concentration of PDE5 of 0.1ug/ml. The enzyme has a molecular weight of 50000 and has one active site. Calculate the turnover numbers for PDE5 with ...
*February 28, 2012*

**Natural Science **

Where do the shortest wavelenghts accur ?
*February 14, 2012*

**Chemistry**

A 25.40 g sample of water containing tritium,(3/1)H , emits 1450 beta particles per second. Tritium is a weak beta emitter, with a half-life of 12.3 yr. What fraction of all the hydrogen in the water sample is tritium?
*February 13, 2012*

**Chemistry**

A 50.6 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu). If 29.6% of the chlorine atoms in the sample are chlorine-36 and the remainder is naturally occurring nonradioactive chlorine atoms, how many disintegrations per second are...
*February 13, 2012*

**Chemistry**

Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. How many beta particles are emitted in 190s by a 3.10mg sample of Co-60? What is the activity of the sample in Bq?
*February 13, 2012*

**geometry**

I need help to graph the circle 4x^2+4y^2+16x-32y+71=0 Graph the circle
*February 12, 2012*

**Chemistry**

Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. How many beta particles are emitted in 190s by a 3.10mg sample of Co-60? What is the activity of the sample in Bq?
*February 12, 2012*

**Microbiology**

Please help me answer this question. Thanks a lots. Some Archaea have ATPases with different H+:ATP ratios. Assumes the delta Gp for ATP synthesis in one such organism is -518 mV. The minumum delta P required to generate ATP with a typical bacterial ATPase is about -173 mV. ...
*February 9, 2012*

**Math**

Solve each equation. 9n-3=7(n+3)+2n I got -24 is that right?
*February 8, 2012*

**Algebra II**

What is the simplified version of (2x^(-3)y^(2))^(-2) and (z^4)/(2z^3) Thanks!
*January 29, 2012*

**algebra**

what is 28 seconds over 2 minutes written in its simplest form
*January 28, 2012*

**APUSH**

how did huge industrial trusts develop in industries such as steel oil and banking, what was the effect on the economy?
*January 24, 2012*

**Physics**

A total of 8.0 joules of work is done when a constant horizontal force of 2.0 newtons to the left is used to push a 3.0 kilogram box across a counter top. Determine the total horizontal distance the box moves.
*January 16, 2012*

**ahsa math**

hey need help with this asap you are given 12 feet of fencing to build a cage how many different rectangle can you build? WHICH WOULD YIELD THE MAXIMUM AREA
*January 5, 2012*

**pre calc**

evaluate the trigonometric function of the given quadrantal angle. tan 1440° Evaluate without using ratios in reference triangle. sec 3π/4
*January 4, 2012*

**finance**

a.Project A Payback period Year 1 + Year 2 + Year 3 = $60,000 Year 4 + $20,000 Initial investment = $80,000 Payback=3 years + ($20,000 / 30,000) Payback =3.67 years Project B Payback period $50,000/ $15,000 = 3.33 years B. Project A CF0 = -$80,000; CF1= $15,000; CF2= $20,000; ...
*January 4, 2012*

**Chemistry**

What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a) potassium perchlorate b) cesium nitrate c) calcium iodide I don't need just the answers, I'm...
*December 28, 2011*

**calculus 2**

what is the polar area between r=5sinx and r=5cosx
*December 7, 2011*

**calculus**

A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?
*December 1, 2011*

**psychology**

Suppose that you are dropping off at a large mall without money and merely wander around looking at stores and displays. Later, someone asks you were a particular store is located in the mall. The fact that you direct the person to the store indicates that ______________ has ...
*November 12, 2011*

**Math**

You are bending a wire to make a coat hanger. The length of the wire is 88 centimeters, and 20 centimeters are needed to make a hook hanger. The triangular portion of the hanger is an isosceles triangle. The length of one leg of this triangle is 3/5 the length of the base. ...
*November 1, 2011*

**Physics**

The wind exerts a force of 284 N North on a sailboat, while the water exerts a force of 132 N West on the sailboat. What is the magnitude of the net external force on the sailboat? Answer in units of N
*October 27, 2011*

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