Monday

February 8, 2016
Total # Posts: 550

**Math Algebra , high school **

A biologist has three salt solutions: some 5% solution, some 15% solution, and some 25% solution. She needs to mix some of each to get 50 liters of 20% solution. She wants to us twice as much of the 5% solution as the 15% solution. How much of each solution should she use? How...
*December 13, 2012*

**statistics please**

yes you did Thank you...!!!!!
*December 12, 2012*

**statistics please**

Experience in investigating insurance claims shows that the average cost to process a claim is approximately normally distributed with a mean of $80. New cost-cutting measures were started and a sample of 25 claims was tested. The sample mean of the costs to process these ...
*December 12, 2012*

**statistics**

thank you....!!!
*December 5, 2012*

**social studies**

how to write a song about american culture
*November 29, 2012*

**physics**

23.4
*November 27, 2012*

**Human Resources**

Consider the fact that during the past few years, many firms have laid off thousands of workers, frozen employee pay and eliminated or reduced bonuses. Yet at the same time many of these firms have retained "key employees" and CEOs by giving them huge compensation ...
*November 19, 2012*

**maths**

a woman who is 5feet 4 inches cast a shadow that is 6 feet tall. how long of a shadow would be cast by a man who is 6 feet 8 inches tall
*November 5, 2012*

**English**

Thanks, they're all right!
*October 29, 2012*

**English**

I really need to get a WORKING charger for my phone. Participle or verb? I think it's a verb, but I'm really not sure.
*October 29, 2012*

**Statistics**

25 students test grades (possible scores 0 to 100)has a standard deviation of 15. What logically follows???
*October 10, 2012*

**finance 370**

How did they round this number off. Value debt310 million +110 value equity million=.738=73.8% Then Value Equity over Value Of Debt +Value of Equtiy $310 million + 110 million=0.262=26.7% How did they get these number
*October 4, 2012*

**Statistics - math**

Do you have an answer that I can check my calculations with? I haven't worked a problem like this in a long time - am trying to help a friend with this problem. We're having trouble calculating it. I'm using a regular calculator, not a scientific one. Any suggestions
*October 2, 2012*

**Statistics - math**

Each consumer has a 25% chance of preferring your product over the competitor's product. If we question 15 customers, what is the probability that at least 3 will prefer your product?
*October 2, 2012*

**Statistics - math**

The answer is supposed to be 0.04 + 0.25 + 0.42 + 0.24 = 0.95 However, when I do the math above, I get 0.01 + 0.03 + 0.04 + 0.04 = 0.12. Where am I making the error in calculating this?
*October 2, 2012*

**Statistics - math**

An urn contains 5 red balls and 10 white balls. 6 balls are randomly drawn and not replaced. What is the probability that 3 or fewer balls drawn are red?
*October 2, 2012*

**math**

so here's my edited work: 10^x = 65/2 xln10 = ln (65/2) xln10 = ln65 - ln2 x = ln65 - ln2 - ln 10 x = 1.17865~ , BUT when i check the original equation: x = log 32.5, x = 1.51188~ hmmm they don't match up. can someone please tell me where i'm going wrong?
*September 11, 2012*

**math**

ooopsss i think i know where i went wrong. it's supposed to be 10^x = 65/2 and then i apply the natural log to both sides.... lemme check..
*September 11, 2012*

**math**

how do i solve for x when x = log(32.5)? here's my work: log x = y 10^y = x then, x = log (32.5) 10^x = 32.5 10^x = 17/2 this is where i get stuck... i don't know how to get rid of the bases... can some one please teach me how? thank you! :)
*September 11, 2012*

**intermediate algebra**

Solve for w. S -2 LW divided by 2W plus 2L equals H
*August 28, 2012*

**Geometry**

You want to frame a picture that is 5 inches by 7 inches with a 1 inch wide frame. What is perimeter of outside edge of the frame.?
*August 21, 2012*

**early childhood education**

At What Age Does Exercise Begin To Result In Strength In Boys And Girls?
*June 16, 2012*

**Math (Simplest Radical Form)**

What is the 9th root of 64, in simplest radical form?
*June 15, 2012*

**Chemistry**

Hi, I need help with a chemistry question. Question: Iron ore is treated with carbon monoxide to extract and purify the iron. a) Calculate the minimum mass of carbon monoxide that must be ordered by a refining company for every metric tonne of iron ore that is processed.
*June 1, 2012*

**criminal justice**

What are the requirements and the mandates in pretrial measures required by law?
*May 20, 2012*

**financal problems**

Computing future value. Calculate the future value of a retirement account in which you deposit 2,000 a year for 30 years with an annual interest rate of 7 percent.
*April 24, 2012*

**financial planning problems**

During a job interview,Pam Thompson is offered a salary of 28,000.The company gives annual raises of 6 percent. What would be Pam's salary during her fifth year on the job?
*April 24, 2012*

**math**

A bike costs $117. This is $12 more than 3 times the amount Tom saved last month. How much money did Tom save last month? Write an equation, solve the problem. Equation: 12+3n= 117?
*April 23, 2012*

**Physics**

What about for an LED? Wouldn't that at least have constant current? I'm asking this because for an assignment where we had the previously stated question I put constant current which was marked correct. But with your help and research I've realized it should ...
*April 3, 2012*

**Physics**

Does the filament of a bulb have constant resistance, constant voltage or constant current? I would think it's constant current. But can someone logically explain why? I can't understand it much.
*April 3, 2012*

**Understanding percent**

65%?
*March 27, 2012*

**11th grade math**

read3books4minits. Idonotnoaboutfillchrips.butmabesomere time.readyourbooks
*March 25, 2012*

**College Physics**

nothing
*March 22, 2012*

**Physics**

In Fig. 25-37, V = 12 V, C1 = 9.8 µF, and C2 = C3 = 18 µF. Switch S is first thrown to the left side until capacitor 1 reaches equilibrium. Then the switch is thrown to the right. When equilibrium is again reached, how much charge in Coulombs is on capacitor 1?
*March 19, 2012*

**statistics**

John drives to work each morning and the trip takes an average of µ = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of ó = 5 minutes. For a randomly selected morning, what is the probability that John’s drive ...
*March 4, 2012*

**PHYSICS HELP**

I got the anwser
*February 16, 2012*

**PHYSICS HELP**

A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mass of 66.0 kg and he a mass of 72.0 kg, and they start from rest 25.0 m apart. A)Find his initial acceleration. i put 7.68* 10^-12 m/s^2 B)Find her ...
*February 16, 2012*

**math**

How do you solve C=ln(125000000/1-125000000
*January 16, 2012*

**algebra**

write an equation in standard form that satisfies the given conditions parallel to the x-axis and through (4,-1)
*January 8, 2012*

**finance**

Templeton extended care facilities, inc is considering the acquisition of a chain of cemeteries for $ 400 million. Sice tehe primary asset of this business is real estate, Templetons management has determined that they will be able to borrow the majority of the Money needed to...
*January 3, 2012*

**Geometry**

tree is 6ft 3 in compute the cross-sectional area of the tree measured at 3 feet above ground
*December 6, 2011*

**Grammer**

Use two commas around “extra information” in a sentence to show that it is not important to the meaning of that sentence if taken out. For example: “The hardware store down the street, which had been paved recently, is open until midnight five days a week.”...
*December 1, 2011*

**Language Arts**

Hello, I have been searching the web for any info on author James B Garfield, he wrote Follow My Leader. I have to create a book jacket for my lit circle group and info on the author is needed. I have checked every site and NOTHING!! Can you help???
*November 30, 2011*

**geometry**

In a right triangle, one side is 9 units in length, and the hypotenuse is 15 units in length. What is the length of the other side?
*November 15, 2011*

**math**

a container holds 250 mL. How many liters does it hold
*September 22, 2011*

**math**

10/3+2*4=8 Insert grouping to make the equation true
*September 20, 2011*

**physics**

What is the kinetic energy of a car of mass 1900 kg moving at a constant speed of 21 m/s
*September 19, 2011*

**science**

an object is ejected sideways with a speed of 10 meters per second, a height of 78.4 meters above the ground. How long does it take to reach the ground?
*September 9, 2011*

**physics-mechanics**

a person walks 400m north along one side of a rectangular field and then 300 m along the other side, the walk takes 10 min, calculate the av. velocity of the person?
*August 26, 2011*

**physics-mechanics**

a person walks 400m north along one side of a rectangular field and then 300 m along the other side, the walk takes 10 min, calculate the av. velocity of the person?
*August 26, 2011*

**Political Science**

Need examples on a economical issues for my political science class. Anything would be helpfull. I was wondering if HIV/Aids, prostitions, discrimination, or sterotyping is a economical issues. Please give any other examples.
*August 25, 2011*

**algebra**

It is possible for a quadratic equation to have no real-number solutions. Solve. t^2+10t+26=0
*July 6, 2011*

**algebra**

Solve by factoring: 10t^2 – t − 2 = 0
*July 6, 2011*

**Algebra**

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12
*July 5, 2011*

**english**

Incense being the emotion?
*May 14, 2011*

**Research**

Heya! Where can I get photos/cartoons on dekulakisation and collectivisation? PLZ don't say google! Coz I'm not allowed to use links straight off it. Still need help with my question, a few questions below this one.
*May 14, 2011*

**Reseach - source evaluation HELP**

Hi, I've been exhausting my opportunities to try and find out the credidentials for this pdf. I need the original date of publication I need the credidentials of the author Its called Russian Collectivisation by George Beers. This is not to put in my bibliography, this is ...
*May 14, 2011*

**Reaearch - URGENT PLZ HELP**

No, its an online source. Plus my school is REALLY small. And I need my evaluation of this source in on monday. I already pasted it into my journal. Its got lots of information that I need.
*May 14, 2011*

**Reaearch - URGENT PLZ HELP**

Hi An pdf file called RUssian COllectivisation was written by a George Beers. I cant find any info on the date of publication or on the author, George Beers HELP!
*May 14, 2011*

**General**

Hey. How do I use the LOC website to find information onf the Soviet Union? Thanks
*May 13, 2011*

**CHEMISTRY (HELP)**

Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the net ionic equation 4...
*May 11, 2011*

**Chemistry**

Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the net ionic equation 4...
*May 11, 2011*

**chemistry**

Considering a 1.0M of each solution, which has the greatest osmolarity? 1. FeCl3 2. K2O 3. HCl 4. HC2H3O2
*May 11, 2011*

**Speechwriting**

Hey How would I go about doing a PPT, assuming that I'm delivering a speech at a conference on Waltzing Matilda. My teacher said it must not detract from the presentation.
*May 10, 2011*

**Algebra Please Help**

Math Word problem with factoring...HELP!!! This questions has me stumped!? I have been working on it for days... A 10ft-by-15ft pool was installed in your backyard. You have $3000 left that you would like to spend on surrounding the pool with a patio, equally wide on all ...
*May 6, 2011*

**Economics**

Thank-you! Do you know of any sites that specifically pertain to the airline industry?
*April 25, 2011*

**Economics**

Hey! I'm doing an assignment in which I need to research a company (Qantas)and its performance on the ASX (Australian Securities Exchange). I know that some sources of information will be the Qantas website and the ASX website but are there any other websites maybe ...
*April 25, 2011*

**us history**

What exactly do you need help with? Structure? How to frame your research?
*April 25, 2011*

**business**

You mean the four p's Product, Place, Promotion and Price
*April 25, 2011*

**Copyright**

Hey! Is it illegal under copyright law to record sections of a video so that you can use the quotes in an assignment about the video but then delete the sections after you've used them?
*April 25, 2011*

**Speechwriting**

Hi. How can I start a speech without saying goodmorning ladies and gentlemen? But not sound rude...
*April 25, 2011*

**Solving Geometry Problem - PLEASE HELP - Test tom!**

A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that
*April 19, 2011*

**math**

A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that
*April 19, 2011*

**Chemistry**

A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added
*April 7, 2011*

**Chemistry**

A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added
*April 7, 2011*

**Math**

Today, Harry mowed the lawn and weeded the garden. Usually, he mows the lawn every 6 days and weeds the garden every 4 days. How many days is it until Harry will again mow the lawn and weed the garden on the same day?
*April 6, 2011*

**Math**

Karla walks 8/10 mile to the library. About how many miles does she walk?
*April 6, 2011*

**Chemistry**

Given the following information: Ag^+(aq) + Cl^-(aq)<-->AgCl(s) Keq=1.8x10^-1 Ag^+(aq) + 2NH3(aq)<->Ag(NH3)2^+(aq) Keq=8.2x10^3 Explain why the AgCl(s) dissolved when NH3 was added to the test tube.
*April 3, 2011*

**Roper**

The length is 3.8m, the diameter is 0.19
*March 24, 2011*

**Math**

What angle equal to 6/8 turn?
*March 23, 2011*

**math**

Can you explain a little more on equivalent fractions with common denominator 3/4, 2/3, 7/8 thank you verry much.
*March 21, 2011*

**math**

Find equivalent fractions with a common denominator and order from least to grestest 1/2, 4/9, 4/18
*March 21, 2011*

**math**

Equivalent fractions 1/2,6/10,9/27,4/16
*March 15, 2011*

**chemistry**

how do you find the Kc of a reaction?
*March 11, 2011*

**chemistry**

what is the pH if you mix 250ml of 3M HCl with 500ml of 1.5M CN-? i know that: HCl+CN- ---> HCN+Cl- 250ml converts to .75 moles and 500ml also converts to .75 moles when using the 3M and the 1.5M. Ka=X^2/m-x x/1000=.015/750 .02 CN- left. 2.5*10^5=x^2/(.02-x) 2.5*10^5(x^2/(....
*March 11, 2011*

**chemistry**

At 2010K, the equilibrium constant Kc is 4*10^-4 for the following: N2+O2-->2NO If the equilibrium concentration of N2 is .28M and O2 is .38M, what is the equilibrium concentration of NO? a)1.8*10^-9 b)2.1*10^-5 c)4.3*10^-5 d)6.5*10^-3
*March 11, 2011*

**calculus**

Under what conditions for f'(x) and f''(X) can a graph be " straight" wthout being horizontal?
*March 8, 2011*

**Algebre II**

23 more than t
*March 7, 2011*

**Chemistry**

Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of the following statements is(are) false ? A) The two containers hold an equal mass of gas. B) The two containers hold an equal number of gas particles...
*February 18, 2011*

**physics??**

Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the star? (b) What ...
*February 15, 2011*

**PHYSICS CIRCULAR MOTION**

In an automatic clothes drier, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.364 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle of è ...
*February 15, 2011*

**physics circular arc**

A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius of 68.0 m. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road.
*February 15, 2011*

**physics**

A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is the coefficient of ...
*February 15, 2011*

**Physics circular motion**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
*February 15, 2011*

**PHYSICS**

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings toward the outside of the...
*February 15, 2011*

**physics1**

A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is the coefficient of ...
*February 14, 2011*

**Physics AP**

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings toward the outside of the...
*February 14, 2011*

**physics??**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
*February 14, 2011*

**physics!**

A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum and collect at the ...
*February 14, 2011*

**physics (centripetal acceleration)**

The second hand and the minute hand on one type of clock are the same length. Find the ratio (ac,second/ac,minute) of the centripetal accelerations of the tips of the second hand and the minute hand.
*February 14, 2011*