Friday
April 18, 2014

Posts by kelly


Total # Posts: 1,485

Chemistry
thank you :)

Chemistry
If 0.48 g of sulfur are added to 200 g of carbon tetracholoride, and the freezing point of the carbon tetrachloride (Kf=30 degrees C/m) is depressed by 0.28 degrees C, what is the molar mass and molecular formula of the sulfur?

math
Assume that you randomly select 8 cards from a deck of 52. What is the probability that all of the cards selected are hearts?

Math
A group of students who are selecting 2 of their group at random to give a report, but assume that there are 5 males and 3 females. What is the probability that 2 females are selected? 2 males?

Math
Assume that you select 2 coins at random from 5 coins: 3 dimes and 2 quarters. What is the probability that all of the coins selected are dimes?

sociology
Social capital refers to the collective value of all "social networks" [who people know] and the inclinations that arise from these networks to do things for each other ["norms of reciprocity"].

sociology
cultural capital is defined as “forms of knowledge, both tangible and intangible, that have value in a given society in relation to status and power Cultural capital defines how people (human) engage each other (social) and their resources (economic).

sociology
what are some examples of social and cultural capital that young children experience

Physics
A 1.7 cm thick bar of soap is floating in water, with 1.1 cm of the bar underwater. Bath oil with a density of 890.0 kg/m3 is added and floats on top of the water. How high on the side of the bar will the oil reach when the soap is floating in only the oil.

Physics
A 1.7 cm thick bar of soap is floating in water, with 1.1 cm of the bar underwater. Bath oil with a density of 890.0 kg/m3 is added and floats on top of the water. How high on the side of the bar will the oil reach when the soap is floating in only the oil.

math
45 1/5 x 3/4 =

biology
the importance of these organic compounds ( carbohydrates, proteinds, lipids) in the cells and tissues of living things

Physics
A ball is thrown upward from the top of a 50.0 m tall building. The ball's initial speed is 12.0 m/s. At the same instant, a person is running on the ground at a distance of 44.0 m from the building. What must be the average speed of the person if he is to catch the ball a...

English
yes i read it but i dnt understand it

launguge arts
I need to un scramble these words and make new ones help eioubdhrs

bio101
2. Find a media piece—article, video, presentation, song, or other—that recognizes the fundamental concepts of chemistry in biology. Include the link or reference citation for the piece and describe how it helped you better understand how fundamental concepts of chem...

math
Joe and Bob manufacture bikes. Joe can make 12 bikes in 8 hours while Bob can make 12 bikes in 6 hours. Working together how many hours will it take them to make 12 bikes? Please explain showing steps so I can learn it. I don't just need the answer. Thanks! PS I originally...

math
Joe and Bob manufacture bikes. Joe can make 12 bikes in 8 hours while Bob can make 6 bikes in 12 hours. Working together how many hours will it take them to make 12 bikes? Please explain showing steps so I can learn it. I don't just need the answer. Thanks!

physics
A soccer player kicks the ball toward a goal that is 27.8 m in front of him. The ball leaves his foot at a speed of 18.5 m/s and an angle of 30.4° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 18.5 m/s...

algebra
here's the rest of the info there is angle on one triangle measured 15.5 ft and on another triangle 5ft2 inn and 7ft 9 in

algebra
Jenny is 5ft 2in. tall. To find the height of a light pole, she measured her shadow and the pole shadow What is the height of the pole?

biology
Hydrochloric acid

algebra
determine whether 17 is a solution of the equation 5x+7 = 92

chemistry
Can somone please explain how to do this problem: How many cubic centimeters of olive oil have the same mass as 1.00L of gasoline? the density of gas is .66g/ml and olive oil is .92g/ml Thank you for your help

chemistry
Sorry, it's an 8.0 oz box so there are 16 servings in the box Thanks

chemistry
how many grams of sodium are used to prepare 50 boxes of crackers? sodium per serving is 140mg, serving size is .50 oz for 6 crakers. i got 112g and the answer is suppose to be 110g and i cant figure out how to get 110 thank you

chemistry
why are the atoms in metallic bonds positively charged?

physics
1. Calculate the radius of orbit for a hydrogen electron in the n=3 level. 2.The half life of an unknown substance is one minutes. If the initial number of particles is 20 how many particles will remain after two minutes have elapsed?

myths
what are some modern day myths?

Math, Quadratics
Farmer John is building a pen to keep his pig in. John has 40m of fencing. He will only need to make 3 sides to the pen because the 4th side will be along a barn. If John wants the maximum area what should the side lengths of the pen be?

Math, Quadratics
Hi Damon, I got the same answer as you up to the equation x^2 + 30x - 200=0, but after that I don't understand what happened after that.. where does the 900 and 800 come form? and why you do divide by 2? thanks

Math, Quadratics
Adam has a hockey rink in his backyard. The current dimensions are 10m by 20m. Adam wants to have a hockey tournament and needs to double the area of his hockey rink. How much must Adam increase each dimension if he wants to increase them the same amount?

physics
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 59.7° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 28.5 m away. The rocket attains its launch speed in a negligibly short period of time, after which its en...

Chemistry
What mass of sodium bromide (NaBr) is required to make 250 cm3 of a 0.35 mol.dm-3 solution?

Chemistry
320g of sulfur dioxide react with 32.0g of oxygen and excess water to form sulfuric acid (H2SO4) a. What is the limiting reagent? b. What is the theoretical yield of product? c. How many grams of excess reagent will remain?

Chemistry
Ethane (C2H6) reacts with oxygen to produce carbon dioxide and water. Assuming there is an excess of oxygen, calculate the mass of CO2 and H2O produced from 1.25 g of ethane

7th grade Math
Sorry Eric, yes I did mean 43 (typo sorry)

7th grade Math
Assume that there are 100 marbles in each bag. Firstly divide 100 by 7 (ratio 4:3) 14.28. Multiply 14.28 by 4 = 57.12 *57 marbles Mulitply 14.28 by 3 = 42.84 *53 marbles Secondly do the same for ratio 3:2 Divide 100 by 5 = 20 Multiply 20 by 3 = 60 marbles Multiply 20 by 2 = 40...

fifth grade math
Daughter has homework problem. P(3,6) is only thing listed. ?

math
Correction...it is supposed to be P(6,3)

math
We don't understand

math
P(3,6)

statistics
Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of 400 and a standard deviation of 100. Find the probability that a student will score over 500.

algebra
which measure will remain the same if Jarod next three quiz score are 96,93,and 93 a.mode b.range c.mean d.median

geometry
Its a if, then question. It says If I get another chance, then I will do better. And 'i get another chance is lined' what would it be? Like would it still be a hypothesis without the 'if' underlined? Would it be the argument?

physics
A roof rises 1.7 feet vertically and 13.3 feet horizontally. What is the grade of the roof in percentage

Spanish
NO its (Ella es americana.)

algebra
what is the sq root property of 2x^2=26

Physics
In 35.0 s, a pump delivers 0.574 m3 of oil into barrels on a platform 25.5 m above the intake pipe. The oil's density is 0.820 g/cm3.

math word problem
A rectangle garden is 30 ft by 40 ft. Part of the garden is removed in order to install a walkway of uniform width around it. The area of the new garden is one-half the area of the old garden. How wide is the walkway?

math
The number 33 bus arrives at the corner of Coldspring and Hillen every 15 minutes. The number 40 bus arrives at the same corner every 46 minutes. If both buses leave the corner at 9:08 am, when is the next time the buses arrive at the corner at the same time?

Algebra
Thank you.

Algebra
Divide: (20b^(3)+17b^(2)+18b+43)÷(4b+5)

Algebra
Thank you.

Algebra
3y-24/14 divided by y-8/4y

Algebra
Thank you.

Algebra
Solve for x. 4x(x-1)-5x(x)=3

english
What is the word ball in this sentence? The young boy played ball in the yard. adverb?

PARAPHRASING CONFUSION PLEASE HELP???
I need help with this and have no clue as to what I should do. I have trouble with paraphrasing. Review the following passage and paraphrase the long passage in the following box. Use the reference to create an appropriate APA-formatted, in-text citation. Additionally, include...

Algebra
Thank you very much!!

Algebra
-4^2+44x-160=0 If you graphed the above equation, would the graph open up or down? How can you tell without graphing it?

Algebra
A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 100 ft of fence? What should the dimensions of the garden be to this given area? The maximum area that can be encl...

Algebra
The length of a rectangle is twice the width. The area is 578 yd.^2. Find the length and width.

Algebra
Thank you.

Algebra
In the community you live, you have been asked to serve on the planning committee for the Fourth of July festival. Your committee has decided to begin meeting early to avoid some of the problems experienced in previous years. Unfortunately, those problems stemmed from poor bud...

finance
You have just graduated and one of your favorite courses was Financial Management. While you were in school, your grandfather died and left you $1 million. You have decided to invest the funds in a fast-food franchise and have two choices–Franchise L and Franchise S. You ...

Physics
ddsa

Rati and Rates Problems
1.Write two equivalent ratios for the given ratio. a. 4/12 b. 11/33 SHOW WORK

Finance
Assume that you are the assistant to the CFO of XYZ Company. Your task is to estimate XYZ's WACC using the following data: 1. The firm's tax rate is 40%. 2. The current price of the 12% coupon, semiannual payment, non-callable bonds with 15 years to maturity is $1,153....

Statistics
Suppose the heights of women aged 20 to 29 follow approximately the N(66.7, 2.4) distribution. Also suppose men the same age have heights distributed as N(70.5, 2.2). What percent (± 0.1) of young men are shorter than average young women?

Algebra - Please HELP
During the first part of a trip a canoeist travels 49 miles at a certain speed. The canoeist travels 25 miles on the second part of the trip at a speed of 5mph slower. The total time for the trip is 5hrs. What was the speed on each part of the trip?

Algebra
The flower garden has the shape of a right triangle. 5ft of a perennial border forms the hypotenuse of the triangle, and one leg is 1ft longer than the other leg.Find the lengths of the legs.

Algebra
Thank you!

Algebra
During the first part of a trip a canoeist travels 49 miles at a certain speed. The canoeist travels 25 miles on the second part of the trip at a speed of 5mph slower. The total time for the trip is 5hrs. What was the speed on each part of the trip?

Finance
You deposit $1000 in an account that pays 8% interest compounded semiannually. After 2 years, the interest rate is increased to 8.40% compounded quarterly. What will be the value of the account after 4 years?

science virus
Influenza is an active virus. I know this because, it spreads very quickly.

science virus
Influenza is an active virus. I know this because, it spreads very quickly.

physics-question 7
A baseball is thrown at an angle of 26 degrees relative to the ground at a speed of 22.1 m/s. The ball is caught 39.2327 m from the thrower. The acceleration due to gravity is 9.81 m/s2 . How high is the tallest spot in the ball’s path? Answer in units of m

physics
A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 5.2 m waterfall. The spy’s speed is 15 m/s and the officials’ speed is ...

Algebra
4th of 2 and 24th of 2 both equal 2. so i'm thinking this is false, I just need confirmation.

Algebra
I did not express a question involving power. Power is expressed as follows: 4^2. I am asking a question involving radical expressions, roots, and radicands.

Algebra
radical expressions=the root of a radicand. I can't type the radical symbol. 4th power to the number 2 and 24th power to the number 2.

Algebra
Is this radical expression true or false? 28 minus 4th root of 2 equals 24th root of 2

Algebra
**radicand

Algebra
Can a radical be negative when the index is even?

Algebra
Solve. .25(250)+250/250

Algebra
If 250 specialty coffee drinks were sold at the bake sale, what would the average cost per drink be given the equation .25x+250/x?

chemistry
I still have it wrong. I have pKa = 9.25. Solved for acid and got 2.39. Then I converted to grams and 62.25. Here's my work ka = 1.0e-14/1.8e-5 = 5.56e-10. solved for pKa -log(5.56e-10) = 9.25. H-H = 9.40=9.25 + log(1.70/acid). acid = 2.39. then, 2.39 x 0.490L = 1.17 M. th...

chemistry
How many grams of NH4Cl must be added to 0.490 L of 1.70 M NH3 solution to yield a buffer solution with a pH of 9.40? Assume no volume change. Kb for NH3 = 1.8 10-5.

Algebra
The average cost per drink can be found by dividing the total cost (.25x+250=total cost) by the number of drinks sold (x). Write an equation that shows the average cost per drink.

Algebra
Add. Simplify if possible. 3/v+8/v^2

Algebra
Add. Simplify if possible. 4/vy^2+9/yv^2

Algebra
Find all the numbers for which the rational expression is undefined: -24/25v

Algebra
Add. Simplify if possible. 4/vy^2+9/yv^2

Algebra-Undefined
Find all numbers for which the rational expression is undefined: -24/25v

Algebra-Rational Equation
4/vy^2+9/v^2y

Algebra-Solve
x/x+3-3/x-3=x^2+9/x^2-9

Algebra/Time
The officejet printer can copy Lisa's dissertation in 22 min. The laserjet printer can copy the same document in 18 min. If the two machines work together, how long would they take to print the document?

Algebra-km/h
Maria bicycles 4km/h faster than Javier. In the same time that it takes Javier to bike 60km, Maria bikes 72km. How fast does each bicyclist travel?

Algebra/Math
A group of parents is going to sell specialty coffee drinks including espresso, lattes, cappuccinos and mochas. It cost $250 to rent the equipment, which is a fixed cost. Additionally, the ingredients for each drink (x) cost $0.25. Write an equation that shows the total cost t...

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