Sunday
December 21, 2014

Posts by MAry


Total # Posts: 3,316

physics
At a low point in its swing, a pendulum bob with a mass of 0.2kg has a velocity of 4m/s. Ignoring air resistance, how high will the bob swing above the low point before reversing direction? Please explain and show work.
March 9, 2012

Algebra
add (3c^4-2c^3+11c-9)+(c^5+7c^3+4c^2-3c+6)+(-6c^4+c^2-5c-5)
March 8, 2012

algebra
factor completely 4s^2-25
March 8, 2012

geometry
April wants to add a ribbon border to the circular rug in her living room. If the area of her rug is 113.04 square feet, how long does the ribbon need to be?
March 7, 2012

social studies
it will show u in gooogle
March 7, 2012

statistics
The average salary for graduates entering the actuarial field is $40,000. If the salaries are normally distributed with a standard deviation of $5000 (σ = 5000), find the probability that a graduate will have a salary over $45,000: P(X > 45,000).
March 7, 2012

statistics
.0392
March 7, 2012

math
Tiny is ordering a pizza and cant decide between a round pizza with a diameter of 4 inches or a rectangular pizza that is 12 inches by 14 inches. The round pizza is 9.50 and the rectangular pizza is 10.00. Which is larger? How much larger is it? Which pizza is the better buy ...
March 7, 2012

Chemistry
A solution is prepared by mixing 3.5 g of nitric acid with enough water to make 8.00 L of solution. Find the [H3O+], [OH-], pH and the pOH
March 7, 2012

math
From the pizza shop, James walks 12 blocks south, 22 blocks east, 18 blocks north, and 30 blocks west. What is the least number of blocks that he must travel if he returns to the pizza shop? Explain how you got your answer – draw a picture or write a sentence.
March 6, 2012

math
Bob made a square table top with 100 white square tiles. He painted the tiles along the edge of the table red. How many tiles are red? You must show your work
March 6, 2012

Algebra
give exact and approximate solutions to three decimal places. x^2+5x-7=0
March 5, 2012

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 80 ft of fence? what should the dimensions of the garden be to give this area. The maximum area that the farmer ...
March 5, 2012

algebra
Thank you so much
March 5, 2012

algebra
Is the answer First page 48 second page 49
March 5, 2012

algebra
I am not sure how to figure this out...can you help a little more
March 5, 2012

algebra
A student opens a mathematics book to two facing pages. The product of the page number is 2352. Find the page numbers. The first page is__________ The secnd page is__________
March 5, 2012

science
which of the following is a physical change? Milk becomes sour An iron nails rusts All the water in a solution of salt water evaporates leaving a lot of crystals of salt in the bottom of the dish A wooden log is burned leaving ash in the fireplace
March 5, 2012

biology
Recruitment of b cells
March 4, 2012

SUE PLEASE HELP
its D
March 4, 2012

Algebra 2
What is the probability when you roll 2 dice and you roll a number greater than 4 on the first dice and a 2 on the second dice? pls help :)
March 4, 2012

AP CHEMISTRY
A buffer, consisting of H2PO4− and HPO42−, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the pH of a soft drink in which the major buffer ingredients are 7.20 g of NaH2PO4 and 4.90 g of Na2HPO4 per ...
March 3, 2012

Chemistry
Each of the following processes is spontaneous as described. Which one will have ∆H approximately equal to zero? 1. precipitating 1 mol of AgBr(s) from a solution of Ag+(aq) and Br−(aq) 2. 1 L He(1 atm, 298 K) + 1 L Ar(1 atm, 298 K) → 2 L He/Ar mixture(1 atm...
March 1, 2012

5th grade Math
Insert parentheses in the false number sentence to make it true. -3+5*2-(-6)=37
February 29, 2012

Algebra 2
if one class had 20 students participating in the taste test and each student's rating is represented as ak, how do you write the formula for finding the mean rating using summation notation?
February 29, 2012

Math
Adriano. two is prime as are all the other numbers in his pattern.... hong-li wrote 6 and 6 can be divided by 2 and 3 therefore not prime. Latrell wrote 9 and that can be divided by 3 so 9 is not prime.
February 29, 2012

bio
In 3 or more sentences describe the structure of a water molecule and its unique properties
February 29, 2012

HIS/115
Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?
February 29, 2012

US HISTORY
Why did prohibition take place in mostly rural areas.
February 28, 2012

Math for Liberal Arts Major
Find the solution set for the following inequality: x+1>1/2x-11
February 27, 2012

maths
Given that the equation of the parabola is 5y^2 + 24x = 0. Find (1)The Axis and vertex of the parabola (ii)The focus and the directrix (iii)The distance from the directrix to the focus
February 27, 2012

KNOWLEDGE
Indian movie that won oscar
February 25, 2012

health
patricia had a car crash while she was on her way to work one morning.she was badly injured and needed to have an arm amputated.explain three effects that patricias physical disability may have on her self-concept.patricias husband,andy is a teacher.explain three ways that ...
February 25, 2012

social work
What are some of the issues that need to be addressed in the hiring of competent staff in working with people with disabilities? I am only finding information about employing those with disabilities. How do I phrase this question to Google or ideas where to look?
February 22, 2012

pos/110
civil liberties:currently do we need more or less protection of this liberty in contemporary American society
February 21, 2012

Physics
A block is suspended from the end of a spring. An external force holds the block so that initially the spring is not stretched or compressed. When the block is released, it oscillates up and down between positions A and B. If the mass of the block is 0.5 kg and the spring ...
February 20, 2012

PH103
Truth tables can a. display all the possible truth value involved with a set of sentences. b.determine what scientific claims are true. c.determine if inductive arguments are strong. d.determine if inductive arguments are weak.
February 19, 2012

Physics
What is the truth value of the sentence "Pv~P" A. True B. False C. Cannot be determined D. Not a sentence
February 19, 2012

Calculas
Find any critical numbers of the function. (Enter your answers as a comma-separated list.) g(t) = t sqrt6 − t , t < 13/3 I don't even know how to start out!
February 19, 2012

AP CHEMISTRY
Write the formula for each of the following compounds, being sure to use brackets to indicate the coordination sphere. A) bis(bipyridyl)cadmium(II) chloride B)potassium tetrabromo(ortho-phenanthroline)- cobaltate(III)
February 18, 2012

AP CHEMISTRY
Calculate [OH-] and pH for the following strong base solution; a solution formed by mixing 10.0 mL of 0.011 M Ba(OH)2 with 28.0 mL of 7.4 10-3 M NaOH working and answer would be appreciated
February 18, 2012

algebra
solve square root of y+5-1=2
February 18, 2012

Physics
An electron and a proton are each placed at rest in an electric field of 363 N/C. What is the velocity of the electron 76.1 ns after being released? Consider the direction parallel to the field to be positive. The elementary charge is 1.60218 × 10 −19 C...
February 17, 2012

algebra
4 less than d
February 17, 2012

math
4x-y=3 4x+y=1 show work and explain
February 16, 2012

AP CHEMISTRY
An unknown salt is either KBr, NH4Cl, KCN, or K2CO3. If a 0.100 M solution of the salt is neutral, what is the identity of the salt?
February 16, 2012

math
its 1 times 6, not 16
February 16, 2012

math
is it multiply or is it x? if its multiply i think its p16
February 16, 2012

AP CHEMISTRY
1)calculate [OH-] and pH for each of the following solutions. (Kw = 1.0*10^-14.) a)0.101 M NaF b) 0.030 M Na2S c)a mixture that is 0.019 M in CH3COONa and 0.036 M in (CH3COO)2Ba please help and if u can try to explain
February 16, 2012

AP CHEMISTRY
THANX
February 16, 2012

AP CHEMISTRY
If a solution of HF (Ka = 6.8*10-4) has a pH of 3.42, calculate the total concentration of hydrofluoric acid.
February 16, 2012

james giles math
is that it?
February 15, 2012

managerial accounting
40%
February 15, 2012

math
how can i make a fraction into a pound
February 14, 2012

math
i tried to simplify 10/8 i got the answer of is 2/4 am i correct
February 14, 2012

Chemistry
How many grams of potassium phosphate must be dissolved in 3.75 Liters of water to produce a soltuion that contains 8*10^23 potassium ions?
February 14, 2012

chemistry
I got to 4x^3 + 6x^2=1.12x10^-12 (my moles of potassium chromate is 1.5 instead of 1) but now I'm stuck
February 13, 2012

Math
You have $47 to spend on music and movie downloads. Each album download cost $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.
February 13, 2012

Math
Please show me how to set and solve: The sum of two numbers is 90. Their difference is 12. What are the numbers?
February 13, 2012

amer lit
how does the song dirty little secrets by the all american rejects apply to the scarlet letter
February 12, 2012

math please help
determine the domain of the real valued function f(x) = sqrt(5 - (sqrtx))
February 12, 2012

Logics
Logicians regard the following as the meaning of the word "argument." (Points : 1) a. A hostile and emotional dispute b. A poetic tribute to Spring c. A set of reasons put forth to support a claim d. The kind of thing one has with a spouse
February 12, 2012

statistics
Find the mean of the given probability distribution. The number of golf balls ordered by customers of a pro shop has the following probability distribution.
February 12, 2012

Physics
A child insists on going sledding on a barely snow-covered hill. The child starts from rest at the top of the 60 m long hill which is inclined at an angle of 30o to the horizontal, and arrives at the bottom 8.0 s later. What is the coefficient of kinetic friction between the ...
February 11, 2012

math
correction!!! f(x) = sqrt( 5 -(sqrt x))
February 10, 2012

math
determine the domain of the real valued function f(x) = sqrt(5 - (sqrt5))
February 10, 2012

Human Services
I have a problem with APA formatting and how to cite Example 1 According to McNamara, n.d The Question---my answer Or do I need to cite each question The amount of questions are about 100
February 10, 2012

physics
need help with this question does anyone know the answer
February 10, 2012

Chemistry
1.9 mol HCl and 3.8 mol NaOH react according to the equation HCl + NaOH −→ NaCl + H2O . Calculate the amount in moles of NaCl formed. Answer in units of mol
February 9, 2012

Chemistry
How much water, in grams, can be made from 3.59 × 10^24 hydrogen molecules? Answer in units of g
February 9, 2012

History
Analyze the appeal of the Omaha Platform to people who felt that industrialism was too dominant in the economic and social foundation of the United states.
February 9, 2012

Math
If a line is measured as 1 4/8 inches how would simplify measurement
February 8, 2012

History
During the late 1800's, the Populist Party supported all of the following EXCEPT? a.) high tariffs b.) tight controls on inflation c.) lower interest rates on loans d.) government control of railroads I think it's either A or B???
February 8, 2012

Algebra
I need help with a riddle my Algebra teacher gave us? Why did the square root of 9 refuse to discuss anything with his brothers cubed root of 9, 1 ninth and the square root of negative 9?
February 5, 2012

Logics
"My husband snores. All men must snore" committs which of these fallacies? a. hasty generalization b. appeal to pity c. false cause d. post hoc ergo propter hoc
February 5, 2012

Math
Please show me how to set this up and how to solve. Thanks in advance. At the local ballpark, the team charges $5 for each ticket and expects to make $1,300 in the concessions. The team must pay its players $1800 and pay all other workers $1500. Each fan gets a free bat that ...
February 4, 2012

Math
Please show me how to set this up: A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110ft., and the distance around should be no more than 380ft. Write a system of inequalities that models the possible dimensions of the...
February 3, 2012

english
Object pronouns include you, she, he, it, and we. True False
February 2, 2012

chemistry
For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation. pH values: NaCl 6.89 NaC2H3O2 7.75 Na2CO3 11.20 Cu(NO3)3 4.73 NH4Cl 5.91 Zn(NO3)2 5.20 KAl(SO4)...
January 31, 2012

math
x/60=30/100 cross multiply to solve for x.
January 31, 2012

chemistry
The Ka value for HCN is 4.9x10^-10. What is the value of Kb for CN-?
January 31, 2012

chemistry
For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation.
January 31, 2012

chemistry
For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation.
January 31, 2012

Chem 11
im assuming you mean "moles" not "miles" (4.059g sample/1)x(1 mole sample/g of sample in one mole(take number of elements in formula multiplied by individual grams found in the periodic table)). there is your answer. easy as pie.
January 31, 2012

Math
2 sheets of paper for 30 studens: 2(30) if she has 19 and needs more subtract 19 from 2(30). example: (2(30))-19.
January 31, 2012

Physics Help!
A 220 uF capacitor with a 10% tolerance rating is charged. The voltage across the capacitor is measured to be 110 +/- 5.5 volt. Calculate the electrical charge stored in the capacitor. Estimate the error in the charge by propagating the uncertainty in the capacitance and the ...
January 27, 2012

Math
How do I set this up and solve it? Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 4 CDs a month to her collection. Find the number of months after which they will have the same number of CDs.
January 27, 2012

Physics!! Help!!!!!
The time dependence of voltage across a discharging capacitor is given by the exponential decay. The voltage on the capacitor at time t= 0 sec is 24 volt. If a 220 +/- 22uF capacitor and 1 Mega ohm (5% tolerance) resistor are used in the RC circuit, what would be the value of ...
January 26, 2012

calculus
Find f'(a). f(t) = t^4 − 7t
January 26, 2012

Math
Reasoning What is the greatest number you can make using these digits? 572. ..... 257 572 725 752
January 26, 2012

harris middle school
a bag contains 5 red marbles,4 white marbles, and 9 blue marbles. you pick a marble without looking. find the probability of drawing a white marble.
January 26, 2012

Business English
your application will be processed by next Thursday
January 25, 2012

chemistry
Air is 20.9% oxygen by volume.How many mL of air contains 175 mL of oxygen?
January 25, 2012

Math
a farmer wants to put a fence around a rectangular field and then divide the field into three rectangular plots by placing two fences parallel to one of the sides. if the farmer can only afford 1000 yards of fencing, what dimensions will give the maximum rectangular area?
January 22, 2012

math
How can I figure out the the estimate the diffrence between 53 and 37?
January 19, 2012

logic
Mary is poor. She has not been able to find a job and has two children she needs to feed. Assume Mary is forced to let her children go hungry or steal some food from a local grocery store. Which should she do? Construct an argument that supports Mary's decision to steal ...
January 19, 2012

science
what helps a camel walk on sand?
January 18, 2012

college algebra
, for this problem f(x)=3x^2-6x-7,what is the minimum value and where do it occurs, and what is this functions domain and range?
January 17, 2012

geometry
a solid aluminum cube measuring 15 inches on a side is melted and rolled into an aluminum wire tat is 0.2 inches in diameter. what will be the length of this wire?
January 17, 2012

chemistry
Energy in the amount of 470 J is added to a 30.0 g sample of water at a temperature of 9.00 degrees C. What will be the final temperature of the water?
January 16, 2012

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