# Posts by gina

Total # Posts: 594

**orgo chem**

how much acid will remain after 3 extractions with 1.0 mL of ether of 50mg butanoic acid, 5mL water?

**Physics**

A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. A rope is wound around the cylinder and its free end is attached to a block of mass 54.0 kg that rests on a platform. The cylinder has a mass of 265 kg and a radius of 0.430 m. Assume...

**Indian wells**

5/8 of the students in mr. Halls class got an A or B . Four times as many students got an A than a B. what fraction of Mr. Hall's class got an A.

**Math**

Determine if the lines L1 and L2 passing through the give pair of points are parallel, perpendicular, or neither. L1: (-2, -3), (1, 3) and L2: (4, 5), (-4, -11)

**Chemistry**

First calc. the moles from M and L: (.0234)(.01365)= 3.19e-4 Determine moles Ca(OH)2 titrated: (3.19e-4)/2 = 1.60e-4 mol Remember, every one Ca(OH)2 titrated requires 2 H+ [Ca2+] = (1.60e-4)/.01 = .01597M [OH-] = (.01597)(2) = .0319 M Ksp = (.01597)(.0319)^2 = 1.63e-5

**Chemistry**

About 50% of U.S. and most Canadian sulfur is produced by the Claus process, in which sulfur is obtained from the H2S(g) that occurs in natural gas deposits or is produced when sulfur is removed from petroleum. The reactions are described by the equations 1)2H2S(g)+3O2(g)=2OS2...

**math**

the population of Knoxville is 500,000 and is increasing at the rate of 3.75% each year. Approximately when will the population reach 1 million?

**physics**

rank the average gravitational force from greatest to least between (a) sun and mars (b)sun and moon (c) sun and earth include an explanation PLEASE!!!!

**8th grade science**

thank you so much this has really helped me :))

**8th grade science**

Can someone please help me solve this question please because I'm having trouble with this question and can someone please explain to me how they got this answer? Thank you :D

**8th grade science**

Q: A person living in North America will be able to see 15 lunar eclipses in the 2010-2020 decade. In the same time period, only two solar eclipses can be observed in North America. why will more lunar eclipses than solar eclipses be visible from North America in this decade? ...

**Math**

maria works 8 hr shifts.she has earned 62.75 mins of sick time. how many sick days does she have

**Geometry**

What would we do without Ms. Sue??

**Math**

maria works 8 hr shifts.she has earned 62.75 mins of sick time. how many sick days does she have

**Math**

maria works 8 hr shifts.she has earned 62.75 mins of sick time. how many sick days does she have

**Math**

There are 8 standard classifications of blood type. An examination for prospective laboratory technicians consists of having each candidate determine the type for 3 blood samples. How many different examinations can be given of no 2 of the samples provided for the candidate ...

**Math-probability**

A sporting goods store estmates that 20% of the students at a nearby university ski downhill and 15% ski cross country. Of those who ski downhill, 40% also ski cross country. What percentage of these students ski both down hill and cross country? Write as a decimal.

**Math- probability**

Suppose 80% of kids who visit a doctor have a fever, and 30% of kids with a fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat? Round to three decimal places.

**Math**

How do I figure capacity of a cupboard with shelves?

**Math**

Is capacity done the same way? I am confused about the difference between Volume and capacity. Thanks so much for your help!

**Math**

I need to do a project to figure capacity volume of a stationary cabinet with three shelves. I am confused about how to figure this with the shelves.

**physics**

A 9.90-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.372. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b) accelerating upward with an ...

**Pre-calculus**

Thank you so much!

**Pre-calculus**

Explain how the graph of f(x)=(-2)/(x-3)^2 can be obtained from the graph of y=1/x^2 by means of translations, compressions, expansions, or reflections.

**precalculus**

Explain how the graph of f(x)=(-2)/(x-3)^2 can be obtained from the graph of y=1/x^2 by means of translations, compressions, expansions, or reflections.

**physical science**

Doubling the distance will result in a count of (1/2)^2= 1/4 the original count. 1/4 of 1000 = 250 counts per minute.

**Physics**

The left end of a 1-kg, 1.0 m long uniform thin rod is attached to a pivot, about which it can rotate freely. A force F is applied at the right end of the rod at 30 degree angle to hold the rod stationary in a horizontal position. What is the magnitude of the force F? I think ...

**Math**

What is the distance on the ground between 2 posts when the posts are attached to a platform that is 6 feet square and attached with 15 degree brackets? The posts are either 10 foot or 12 foot. Please answer for both.

**algebra**

Do you like roller coasters? If you were asked to design a roller coaster, what would it look like? Would it have steep hills? Would you design the tracks to go upside down? Did you know that polynomial equations are used by the structural engineers who design roller coasters ...

**Math**

28a^11b^7/4a^3b

**Algebra 2**

Find the value of $1000 deposited for 8 years in an account interest compounded semiannually.

**Physics**

Two people wearing skates facing each other. The 1st person is 75kg and pushes the second person 60 kg away at a speed of 2.0 m/s. What is the speed of the 1st person?

**psychology statistics for behavioral sciences**

A multiple-choice test has 48 questions, each with four response choices. If a student is simply guessing at the answers, a. What is the probability of guessing correctly for any question? b. On average, how many questions would a student get correct for the entire test? c. ...

**Quantum Physics**

Helpppp

**Quantum Physics**

Helppp

**chemistry**

For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?

**chemistry**

For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?

**statistics please**

a basketball scout randomly selected 144 players and timed howlong eah player took to perform a certain drill. the times in thissample were distributed with a mean of 8 minutes. the populationstandard deviation was known to be 3 minutes. (a) find the critical value for a 95% ...

**spanish**

(sus)libros (su) (nuestra)

**statistics**

experience in investigating insurance claims show that the averagecost to process a claim is approximately normally distributed witha mean of $80.new cost-cutting measures were started and a sampleof 25 claims was tested .the sample mean of the costs to processthese claims was...

**Math, Algrebra II High school**

You have 29 coins, the total value of which is $1.77. The number of quarter is eight less than the number of pennies and the rest are nickels. How many of each coin do you have?

**Algebra II math high school**

To get the necessary funds for a planned expansion, a small company took out three loans totaling $25,000. The company was able to borrow some money at 8%. It borrowed $2000 more than half the amount of the 8% loan at 10% and the rest at 9%. The total annual interest was $2200...

**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...

**statistics please**

yes you did Thank you...!!!!!

**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 ...

**statistics**

thank you....!!!

**social studies**

how to write a song about american culture

**physics**

23.4

**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 ...

**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

**English**

Thanks, they're all right!

**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.

**Statistics**

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

**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

**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

**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?

**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?

**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?

**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?

**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..

**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! :)

**intermediate algebra**

Solve for w. S -2 LW divided by 2W plus 2L equals H

**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.?

**early childhood education**

At What Age Does Exercise Begin To Result In Strength In Boys And Girls?

**Math (Simplest Radical Form)**

What is the 9th root of 64, in simplest radical form?

**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.

**criminal justice**

What are the requirements and the mandates in pretrial measures required by law?

**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.

**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?

**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?

**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 ...

**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.

**11th grade math**

read3books4minits. Idonotnoaboutfillchrips.butmabesomere time.readyourbooks

**College Physics**

nothing

**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?

**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 ...

**PHYSICS HELP**

I got the anwser

**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 ...

**math**

How do you solve C=ln(125000000/1-125000000

**algebra**

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

**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...

**Geometry**

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

**Grammar**

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.”...

**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???

**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?

**math**

a container holds 250 mL. How many liters does it hold

**math**

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

**physics**

What is the kinetic energy of a car of mass 1900 kg moving at a constant speed of 21 m/s

**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?

**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?

**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?

**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.

**algebra**

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

**algebra**

Solve by factoring: 10t^2 – t − 2 = 0

**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

**AP World History Please help**

Confucius implied that the village elders and gentlemen are the most respected and the highest class while the common man is the lowest class.

**english**

Incense being the emotion?

**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.

**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 ...