# pamela

Most popular questions and responses by pamela
1. ## Chemistry

A zinc-copper battery is constructed as follows at 25°C. Zn|Zn^2+ (0.15 M)||Cu2+(3.00 M)|Cu The mass of each electrode is 200. g. a) Calculate the cell potential when this battery is first connected. - i got this to be 1.14V b.) Calculate the cell

asked on April 28, 2011
2. ## Algebra

Consider the equation 4x^2 – 16x + 25 = 0. (a) Show how to compute the discriminant, b^2 – 4ac, and then state whether there is one real-number solution, two different real-number solutions, or two different imaginary-number solutions. (b) Use the

asked on July 7, 2009

If $3800 is invested in a savings account for which interest is compounded quarterly, and if the$3800 turns into $4300 in 2 years, what is the interest rate of the savings account? asked on October 12, 2013 4. ## Math 140 To help pay for a class trip at the end of the senior year, the junior class at a high school invests$1800 from a fund-raiser in a 18-month CD paying 2.6% interest compound monthly. Determine the amount the class will receive when it cashes in the CD

asked on July 19, 2013
5. ## chemistry

what is the total mass of Rn-222 remaining in an original 160-mg sample of Rn-222 after 19.1 days?

asked on March 31, 2014
6. ## Social Studies

1. describe the achievements of the Maya, Inca, and Aztec. 2. what were the major similarities and differences between the Maya, Inca, and Aztec? 3. why did the Europeans begin to explore? 4. How did the Spanish conquer the Aztec and Incan empires?

asked on May 26, 2011
7. ## s

According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about

asked on June 3, 2013
8. ## Chemistry

In this balanced equation 4Al + 3O2 = 2Al2O3. When 0.54 mole aluminum is reacted in a closed container with 7.80 g oxygen, how many grams of aluminum oxide can form. Please show steps to work out. Thanks

asked on July 16, 2011
9. ## math

A ship leaves POrt P and sails 28km away on bearing of 70 degrees to POrt Q. The ship then turns on a bearing of 160 degrees and sails 21km to POrt R. Find angle PQR, calculate the distance PR, Determine the bearing of R from P. angle PQR = 180 degrees -

asked on February 22, 2016
10. ## college chemistry

How much heat is needed to convert 2.00 kg of liquid ammonia at -40.0 oC to its vapor at -11.0 oC? The specific heat of liquid ammonia, NH3 (l), is 4.70 J/g-K and that of the vapor NH3 (g), is 2.20 J/g-K. The enthalpy of vaporization of ammonia is 23.3

asked on May 25, 2010
11. ## Europe

how did europe's geography affect its development?

asked on April 3, 2011
12. ## Science

2.1 Two blocks of mass M kg and 2.5kg respectively are connected by a light, inextensible string. The string runs over a light, frictionless pulley ,The blocks are stationary 2.1.1 calculate the tension in a string The coefficient of static friction

asked on February 6, 2019
13. ## Math

Gina plans to invest $12,000, part at 4% simple interest and the rest at 6% simple interest. What is the most she can invest at 4% and still be guranteed at least$650 in interest per year?

asked on July 1, 2009
14. ## Physics

A runner runs around a circular track with a radius of 50m.if he runs half way round the track from a to b.am i correct if i say his distance is 100m?

asked on August 17, 2011
15. ## Calc

Radioactive radium () has a half-life of 1599 years. What percent of a given amount will remain after years?

asked on April 15, 2012
16. ## Research and Design

What changes did the Census Bureau make to the conceptualization and operationalization of race in the 2000 census?

asked on March 18, 2016
17. ## math

Mr. Howard wrote the following expressions on the board in order to determine which expressions are equivalent and how they are equivalent. 60x+24, 3(20x+8, 4(15x+6) Explain which of these expressions are equivalent using properties of operations, and then

asked on February 18, 2015
18. ## chemistry

our lab experiment was Isolationa nd Identification of the Major Constituent of Clove Oil. We know the major component is Eugenol, but our professor wants us to write the equations for the extraction of eugenol from the distillate with dichloromethane and

asked on April 20, 2011
19. ## Conflict Management Communications

Provide 2 examples of passive aggressive societal groups and behaviors. I thought the KKK would be one good example, any other thoughts would be most appreciated! Thank yoU! :)

asked on February 20, 2010
20. ## math

Suppose the 435 members of the house of representatives are placed on committees consisting of more than 2 members but fewer than 30 member of members and each member is to be on one committees. Each committee is to have an equal number of members and each

asked on March 12, 2011
21. ## Chemistry

4Al + 3O2 = 2Al2O3. If 41.5 g aluminum and 69.0 g oxygen undergo a reaction that has a 67.0% yield, What mass of aluminum oxide forms. Please help by showing steps to find answers. Thanks

asked on July 17, 2011
22. ## chemisty

14KMnO4+4C3H5(OH)3----->7K2CO3+7Mn2O3+5CO3+16H2O how to do it help me if you can I spend days to find this but I couldn't please help mee.....

asked on January 6, 2012
23. ## Calculus

Derivative of the implicit Function: arctan(x^5y)=xy^5 Here is where I am at. I am pretty frustrated: arctan(x^5y)-xy^5=0 1/1+(x^5y)^2 * (d/dx(x^5)*y+x^5*d/dx(y))-(d/dx(x)*y^5+x*d/dx(y^5))=0 1/(1+x^5y)^2 * (5x^4y+x^5dy/dx) - (y^5+x^5y^4dy/dx)

asked on October 16, 2014
24. ## Social Studies

1. Describe social, political and economic aspects of spanish rule in the Americas. 2. How did the first Global Age affect culture? 3. Why did the slave trade prosper? what effects did it have on Africa? 4. How did the colonization of the Americas affect

asked on May 26, 2011
25. ## Math

There are 20 bottles in a box. Each bottle weighs 1 3/4 pounds. How many pounds do all the bottles weigh together?

asked on November 29, 2016
26. ## 7th grade math

How do you figure out the place value of the stem and leaf of a stem-and-leaf plot???????????????

asked on February 26, 2010
27. ## science

Which of the following is a reason to use parallel sentence structures in a literary analysis essay?

asked on February 15, 2017

Five years ago, you bought a house for $151,000, with a down payment of$30, 000, which meant you took out a loan for $121,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the asked on December 14, 2011 29. ## social studies Help! 1. Describe the social strusture of feudal society. 2. what were the similarities and differences between feudalism in Euope and Japan? 3. How did the Roman Catholic Church influence social, political, and economic life during the Middle Ages? 4. How asked on April 3, 2011 30. ## epidemiology For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department. asked on March 30, 2011 31. ## Math Peter spends 1/4 of his salary on food, 1/3 on clothing and 1/5 on school fees. He saved the rest. What fraction if his salary did he save? asked on March 8, 2017 32. ## sociology what is the basic logic of probability sampling? How does such concepts as homogeneity, heterogeneity, sampling bias, representativeness, and probability of selection fit into each logic? asked on April 25, 2016 33. ## Maths ABC is an isosceles triangle in which the equal sides are AB and A.If AD is an altitude and |BC|=1/2|AB|.Prove that |AD|^2=15|BC|^2 asked on April 23, 2016 34. ## Thesis statement I need to write my own classification and division Essay of 200 words about the versions of English spoken using mother tongue as a sample. I'm having Trouble developing a good thesis statement. Please help! asked on March 7, 2012 35. ## world history As a result of the Peloponnesian war the Greek city-states suffered from political collapse.Are there any conclusions you can draw about how political collapse relates to the fall or survival of civilization? Well, if I understand the question correctly, asked on November 17, 2006 36. ## Thesis statement I need to write my own classification and division Essay of 200 words about the versions of English spoken using mother tongue as a sample. I'm having Trouble developing a good thesis statement. Please help! asked on March 7, 2012 37. ## algebra Annual profit in thousands of dollars is given by the function,p(x)=200square x-3 +10,000,where x is the number of items sold in thousands, x less than 3. describe the meaning of the numbers 3 and 10,000 in the formula. find the profit for 5 different asked on May 21, 2011 38. ## science scientist do their experimental test more than once so they can reduce the effects of chance errors this is called conducting what asked on August 31, 2011 39. ## grammar In which sentence does the verb correctly agree with the subject? 1) A copy of Moby !@#$%^& and a magazine has disappered form my room. 2) Peggy or Phyllis dirve me to Florida every winter. 3) Les and Miranda is late for work today. 4) Not only the muffler

asked on February 3, 2009
40. ## HELP

How do you find acceleration and Fnet for a diagram containing only one object with a mass, like say 10kg, and two arrows going in the opposite directions(horizontally) with thier tips touching each side of the object. **NOTE: there are no other numbers

asked on June 7, 2007
41. ## math

On Monday, Carlos ran 1/8 of a mile. On Wednesday, he ran 5/6 of a mile. Carlos ran 3/8 of a mile on Friday. Which day did Carlos run farthest?

asked on January 6, 2016
42. ## Global Help!

Describe social, political and economic aspects of spanish rule in the Americas. I cant find this answer anywhere help please!!

asked on May 26, 2011
43. ## math

Brenda's dog is 5 times as long as Hugh's dog. Together the dogs are 48 inches long.How many inches long is Hugh's dog?

asked on October 14, 2010
44. ## Media Law

What are the most pressing challenges facing U.S. copyright enforcement interests today in the context of the proliferation of overseas, especially third-world copyright piracy?

asked on October 7, 2009
45. ## S.S

What powers does the Executive Branch have over Legislative Branch?

asked on December 1, 2008
46. ## social studies

if you do it once, it's good. If you do it twice on the same day, it's a serious crime. what is it? One possibility is getting married (to different people). However, both don't need to be done the same day to be a crime. I hope this helps. Thanks for

asked on April 3, 2007
47. ## Science

How has the study of cells affected science today?

asked on January 23, 2007
48. ## Maths

Lucas will be twice his brothers age in the next four years. If lucas's brother is now 6 years old, how old is lucas?

asked on February 7, 2018
49. ## Healthcare

Identify 3 tools from the CMS website that are helpful to achieving the goals set forth by an organization?

asked on August 23, 2015
50. ## Statistics

A standard deck of cards contains 52 cards. Of these, 12 are face cards (kings, queens, and jacks), 13 are hearts, 13 are clubs, and 3 of these are both hearts and face cards. A card is drawn. What is the probability that the card is either a jack of

asked on September 18, 2012
51. ## Chemistry hnrs

what is the electron configuration of vanadium?

asked on September 14, 2012
52. ## Physical science

The engine of a car is being lifted out of the car by using a pulley system. The weight of the engine is 8000N. Use a scale diagram to determine the horizontal force, F1 that a mechanic has to use to hold the engine in such a position that the rope makes

asked on March 7, 2012
53. ## Intermediate algebra

The current in a typical mississippi river shipping route flows at a rate of 4mph. In order for a barge to travel 24mi upriver and then return in a total of 5hr, aproximately how fast must the barge be able to travel in still water?

asked on November 11, 2011
54. ## math

what is 216.3 divided by 10.5? please show the work

asked on September 21, 2011
55. ## chemistry

What information does this value of Kc indicate with regard to the amount of NO(g)in the equilibrium mixture at a 25 degrees celcuis?THe cointainer is heated and the system reacheas a new equilibruim at 2500 degrees celcuis at this temperature there 0,4

asked on March 3, 2010
56. ## Survery of Modern and Contemporary Art

I have to compare and contrast Rococo Architecture and Art Nouveau with political elements as well as historical relevance. I am having troubles finding information on these. Could you help me compare and contrast these, political elements and historical

asked on May 2, 2009
57. ## 6th Grade Math

Sara is 1/4 the age of her father. Sara's father is 60. How many years older than Sara is Sara's father? _____ How many years ago was Sara 1/10 of her father's age? _____ How old was she then? ____

asked on November 15, 2007
58. ## Physics

How do you find acceleration and Fnet for a diagram containing only one object with a mass, like say 10kg, and two arrows going in the opposite directions(horizontally) with thier tips touching each side of the object. **NOTE: there are no other numbers

asked on June 7, 2007

Helen give her brother 1/3 of her money.spend 2/5 and save $28.00. A. How much money helen had at first. B.how much money did belen give her brother. asked on February 7, 2018 60. ## statistics The current rate of success is 70% for 200 students. When the new test is implemented, the rate increases to 85% for the 50 students who pass the test and are allowed into the program. Is this difference significant? asked on October 23, 2016 61. ## Statistics for the Behavioral Sciences Complete an independent project, collect data from your observation experiment and perform a one-way, between-subjects ANOVA on the data using the definitional formula.Include the following: 1. description of research project that includes the operational asked on February 25, 2016 62. ## FRENCH ! (: Dialogue practice: Please check my grammar and sentence structure. This is meant to be an interview dialogue. ** whatever is in () I know I have to add the accents later on. I just wasn't able to on my device now. 1.) Qu'est-ce qui arriv(e) heir? (what asked on January 14, 2016 63. ## algebra t/2 + t+3/3t = 1/t I got the lcd of 12t I stuck at the step of solving and i'm not getting t=-4 asked on April 10, 2015 64. ## math Part A: Which two numbers represented by dots on the number line above are opposites? Part B: Explain how the numbers' relationship to 0 makes them opposites. the dots are -15, -5, 10, 15, 20, 25, and 35 asked on February 18, 2015 65. ## Math 1. Directions: Type your response in the box. Part A: Which two numbers represented by dots on the number line above are opposites? Part B: Explain how the numbers' relationship to 0 makes them opposites. the dots are -15, -5, 10, 15, 20, 25, and 35 asked on February 18, 2015 66. ## Chemisty Consider a hydrogen atom that goes from the n = 2 to the n = 1 state. (a) Calculate the wavelength, in nm, of the photon emitted. (b) What part of the electromagnetic spectrum is it? asked on September 20, 2011 67. ## Chemistry What is the frequency of light having a wavelength of 5.6 micrometers? asked on September 20, 2011 68. ## math Using the Octagonal formula how do you get the 6th octagonal number 96? asked on October 4, 2010 69. ## Language Studies What are some ways that language can be used to perform the act of giving someone a warning? asked on January 29, 2010 70. ## Quantitative Methods of Business Karl's monthly expenses are$3,000. Of this 1/4 is for the mortgage payment, 1/8 is for credit cards, 2/5 if for the car payment, and the rest is for food and miscellaneous expenses. What is the amount of Karl's car payment?

asked on October 26, 2009
71. ## Environmental Science

I was wondering what are some natural resources needed for survival and the consequences for not having those resources. I would like some research cites or cite your resources(where you got the info)

asked on May 3, 2009
72. ## 6th Grade Math

Marta's mother is 5 times as old as Marta. Marta's mother is 25. How old is Marta? ______ In a few years, Marta's mother will be 3 times as old as Marta. How old will Marta be then? ______ How old will Marta's mother be? ______

asked on November 14, 2007
73. ## Algebra/Pre-Calc

Find the values for a and b such that f(x) is continuous on the interval 0 < or = to x < or = to 13. { 2x^2, 0 < or = to x < or = to 3 f(x) = { ax + 3, 3 < or = to x < or = to 7 { b, 7 < or = to x < or = to 13 Can someone explain? Am I suppose to find the

asked on July 6, 2007
74. ## social studies

I'm writing an essay and would like to examine a few people's different opinions on this question in order to help me choose my own: Is the present US action in Iraq imperialism? Why? Thanks! You might browse the following search for ideas.

asked on November 24, 2006
75. ## math lit,business studies,accounting and computer

Can I be an accountant when doing these subjects?

asked on April 4, 2014
76. ## Algebra

Please help me find the value of the annuity for the following: a1= $8000, I=0.06, n=10$8,000 invested for 10 years at 8% compounded annually\$8,000 invested for 10 years at 0.06% n = 10 Thank you.

asked on December 8, 2013
77. ## Science

What happens when TCDD binds to the AhR receptor? How does it cause diseases/health problems in people?

asked on August 13, 2012
78. ## geometry

An open rectangular glass tank with a horizontal base PQRS measures 80 cm by 50 cm by 34 cm. 110 liters of water is poured into the tank. v The tank is tilted towards edge PQ until the water just reaches the edge TU. w Calculate the value of d. s

asked on June 19, 2012
79. ## College Algebra

Evaluate the function y=2.55^(x+1) at the value x=1.83

asked on November 4, 2011
80. ## strayer

For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department.

asked on March 30, 2011
81. ## IT/236

List three things that a Web designer must consider and understand about the purpose or target audience prior to site development. Why do you feel each of these is important to a successful plan?

asked on November 1, 2010
82. ## Math

Express the quantified statement in an equivalent way. Some students are bored. Would it be Not all students are bored?

asked on October 4, 2010
83. ## biology

A group of specialized cells that transport fluids and nutrients is called a. a multicellular autotroph b. a methanogen c. an aggregation d. vascular tissue A?

asked on May 7, 2010
84. ## Math

If a car is driven 372 miles in 6.5 hours, then what is the average number of miles per hour?

asked on November 16, 2009
85. ## Writing in Math

Every digit in 8,999 is greater ,than any digit in 24,005 is greater than 8,999.

asked on September 30, 2009
86. ## Algebra

Let x = log_2 1/8 Write the exponential form of the equation and solve the equation for x.

asked on August 5, 2009
87. ## Algebra

Suppose A is the amount borrowed, r is the interest rate (in decimal form), and m is the total number of monthly payments. Let w = (r)/(12) Then the formula to determine the monthly payment amount for a loan is given by (Aw)/1-(1)/(1+w)^m Suppose Alice

asked on July 31, 2009
88. ## English

A)why was France willing to sell Louisiana, and why did the united states purchase it? B)What was the purpose of Pike's expedition, and where did he travel?

asked on January 21, 2009
89. ## U.S. history

What were the requirements and benifits from being a robber baron in the 1800's?

asked on November 3, 2008
90. ## environmental science

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

asked on April 13, 2008
91. ## physics, social studies

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

asked on April 13, 2008
92. ## Math-precalc

Is it possible to find a rational function that has x-intercepts (-2,0) and (2,0), but has vertical asymptote x=1 and horizontal asymptote of y=0? The horizontal asymptote and the x-intercepts parts stump me. If you can't reach y=0, then how can you get

asked on July 7, 2007
93. ## world history

during the peloponnesian war the greek civilization suffered from political collapse.does that mean that the greek civilization fell? compare this situation with that of the ancient chinese civilizations. http://en.wikipedia.org/wiki/Peloponnesian_War The

asked on November 24, 2006
94. ## Geometry

I know that a rectangular room measures 2300 sq. ft, how long and how wide would the rectangle be?

asked on January 29, 2016
95. ## economics

are there any welfare or subsidy payments that should be received or added

asked on May 23, 2015
96. ## math

5hexponent2/5 =3645/5 find the value of h

asked on September 20, 2014
97. ## math

Write an equation which models how old in years each of you will be when you are three times as old as the younger person use age 10 and 48?

asked on September 6, 2014
98. ## physics

A stationary speaker is emitting a sound of frequency 1330 Hz. The air has a temperature of ^oF. Taking right to be positive, a person is moving toward the source (to the left) at 8.2 \frac{m}{s}. The person will hear a frequency of ... f =

asked on April 21, 2014
99. ## physics

A ball is projected upwards from a platform 8m above the ground,with an initial velocity of 3m/s.How long does it take for the ball to reach the ground.

asked on March 10, 2014
100. ## Life orientation

What, according to the BCEA with regard to the contraventions in work place?

asked on March 13, 2013

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