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

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 3. 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 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. economics

the problem of what to produce in south africa is solved by?

asked on July 25, 2019
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. 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
15. Europe

how did europe's geography affect its development?

asked on April 3, 2011
16. 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
17. 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
18. 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
19. 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
20. 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
21. 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
22. 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
23. 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
24. 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
25. math

what is 216.3 divided by 10.5? please show the work

asked on September 21, 2011
26. 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

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 $121,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the asked on December 14, 2011 28. Chemistry What is the frequency of light having a wavelength of 5.6 micrometers? asked on September 20, 2011 29. science Which of the following is a reason to use parallel sentence structures in a literary analysis essay? asked on February 15, 2017 30. sociology what is the basic logic of probability sampling? How does such concepts as homogeneity, heterogeneity, sampling bias, representativeness, and probability of selection fit into each logic? asked on April 25, 2016 31. Social Studies 1. Describe social, political and economic aspects of spanish rule in the Americas. 2. How did the first Global Age affect culture? 3. Why did the slave trade prosper? what effects did it have on Africa? 4. How did the colonization of the Americas affect asked on May 26, 2011 32. social studies Help! 1. Describe the social strusture of feudal society. 2. what were the similarities and differences between feudalism in Euope and Japan? 3. How did the Roman Catholic Church influence social, political, and economic life during the Middle Ages? 4. How asked on April 3, 2011 33. grammar In which sentence does the verb correctly agree with the subject? 1) A copy of Moby !@#$%^& 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
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. 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
36. 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
37. 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
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. 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
40. 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
41. 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
42. 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
43. 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
44. 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
45. 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

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 47. 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 48. 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 49. 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 50. Chemistry hnrs what is the electron configuration of vanadium? asked on September 14, 2012 51. 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 52. 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 53. 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 54. 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 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. 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 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. 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 59. 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 60. 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 61. Science How has the study of cells affected science today? asked on January 23, 2007 62. 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 63. 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 64. 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 65. 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 66. S.S What powers does the Executive Branch have over Legislative Branch? asked on December 1, 2008 67. 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 68. 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 69. 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 70. 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 71. economics are there any welfare or subsidy payments that should be received or added asked on May 23, 2015 72. 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 73. 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 74. 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 75. 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 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. 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
78. math

Using the Octagonal formula how do you get the 6th octagonal number 96?

asked on October 4, 2010
79. 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
80. 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
81. 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
82. 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

the sides of the DNA ladder are made up of molecules of the sugar______and_______.

asked on January 11, 2009
84. 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
85. world history

why has most of the world impacted continuity change, economics, technology, social and political systems? I am not sure what you are asking. Please repost with more specifics. I hope this helps a little. Thanks for asking.

asked on April 28, 2007
86. 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
87. math lit,business studies,accounting and computer

Can I be an accountant when doing these subjects?

asked on April 4, 2014
88. Science 2

How does TCDD act as an endocrine disruptor?

asked on August 13, 2012
89. Science

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

asked on August 13, 2012
90. College Algebra

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

asked on November 4, 2011
91. 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

what is 9 /24794

asked on November 29, 2010
93. biology

Which of the following are NOT used to classify kingdoms of organisms? a. complexity of the organism b. invertebrate or vertebrate c. method of obtaining nutrition d. type of cell that makes up the organism D?

asked on May 7, 2010
94. 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
95. 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
96. Algebra

Please help! I need to simplify this and am confused. (sqrt5 a^7/2)^4 a^3/a^8

asked on June 29, 2009
97. Question.

What does this Question mean to you: Does the Protection of self-incrimination violate the fifth amendment? Does the police practice of interrogating individuals without notifiying them of their right to counsel?

asked on January 13, 2009
98. 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
99. 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
100. 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

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