Rena
Popular questions and responses by Rena
chemistry
Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80.
asked on January 16, 2011 
informal logics
Choose the pair of words/phrases among the choices that exhibits the same logical relationship as the words/phrases in the following pair. gavel : judge (
asked on December 18, 2010 
Psychology
Which one of the following statements about intelligence is the most accurate? a) IQ is a vaild measurement, and environment factors do not change mental ability b) intelligence is mostly genetic, has the most variablity between groups, and is reliable
asked on August 25, 2010 
Math
Use Euler’s formula to answer the question. A polyhedron has 12 edges and 6 faces, how many vertices does it have?
asked on February 10, 2011 
Floral design
During April, a customer asks you to create an arrangement for an invalid friend who must stay at home for five more days. The invalid friend loves flowers, especially fragrant ones. The amount the customer is willing to spend on the arrangement for this
asked on March 18, 2014 
Chemistry
Are the following electrolytes or nonelectrolytes? 1) CH3CH2CH2OH 2) Mg(OH)2 3) H3CO4CH3
asked on February 26, 2013 
Psychology
In Classical conditioning the response is typically_______, whereas in operant conditioning the response_______ the environment. A. Learned; has a neutral effect on B. Unconditional; is reflexive in C. Reflexive; Produce effects on D. Conditional;
asked on January 25, 2011 
Geometry
A segment has endpoints X (6,2) and Y (1,3). Which are the coordinates of the image for a dilation with scale factor of 1.5 and center at the origin? A. X'(7.5) Y (2.5,5.5) B. X'(4.5) Y (.5,5.5) C. X'(3,1) Y (.5,1.5) D. X'(9,3) Y (1.5,4.5)
asked on November 8, 2016 
psychology
How has Maslow's hierarchy of needs affected public policy?
asked on July 8, 2014 
Psychology
In Classical conditioning the response is typically_______, whereas in operant conditioning the response_______ the environment. A. Learned; has a neutral effect on B. Unconditional; is reflexive in C. Reflexive; Produce effects on D. Conditional;
asked on February 28, 2011 
Psychology
8. Lynn is tired of the nasty remarks she receives from a female coworker. She has tried to the women, returning nasty remarks, and doing nice little things for her. Nothing as worked. Finally, Lynn decides to ignore the remarks to see if that will
asked on January 25, 2011 
Psychology
Patty goes to a pizza buffet, afterwards she comes down with a horrible rash. She visits her doctor who assures her that the rash resulted from overexposure to the sun on the beach that day. After that experience at the buffet, Patty decides never again to
asked on January 25, 2011 
Math
Find the odds. A basketball player with a free throw shooting percentage of 60% gets fouled and goes to the line to shoot free throws. What are the odds in favor of her making her first shot?
asked on January 6, 2011 
Psychology
EEG, PET and TMS are all : A) laboratory observations that introduce experimental bias into the study B) Descriptive methods for studying the brain C) Standardized methods for studying the brain D) experimentally controlled technologies for brainwave
asked on August 31, 2010 
Psychology
Within groups, differences in intelligence are highly correlated with_______. Between groups, differences are highly correlated with ________. a) heritability: environment b)environment: genes c) heritability:random error in measurment d) genes: the
asked on August 26, 2010 
Psychology
A weathy married man in China is having an affair with a beautiful young women who sems primarily attracted to his financial status. At the same time, similar situations are occurring across other races and nations. Sociobiologists would say: A) these
asked on August 22, 2010 
Psychology
One of the best ways to compare heritability is to compare
asked on August 22, 2010 
Math (please check my answer!!)
openstudy(.)com/updates/attachments/514a5d2ae4b05e69bfac38d2mimisilly1363828099165ikk.png The dashed triangle is a dilation image of the solid triangle with the center at the origin. Is the dilation a enlargement or reduction? Find the scale factor. I
asked on November 16, 2016 
English
Which of the following contains a noun clause? A. Louis did not know Jocie could not swim. B. Since last August we have not seen a drop of rain.
asked on November 15, 2016 
Calculus 2 (Differential Equation)
How would you solve the following problem explicitly? Sqrt(1y^2) dx  sqrt(1x^2) dy I separated the x and y terms and got: Integral of 1/sqrt(1x^2) dx = Integral of 1/sqrt(1y^2) dy I was wondering how would you take the antiderivative of each
asked on March 26, 2015 
information technology
While doing online research you enter this keyword search with a truncation character: man* Which of the following would not be a possible response to your search? (Points : 1) Mansion Men Mantle Manny
asked on September 6, 2014 
chemistry
Two containers of equal volume are separated by a membrane that allows free passage of water but completely restricts passae of solute molecules. Into which compartment will water flow, or will there be no net movement of water? Which solution is at the
asked on August 8, 2013 
math
You and a friend are biking in opposite directions starting from the same point. You travel 108 feet every 8 seconds. Your friend travels 63 feet every 6 seconds. How far apart are you and your friend after 15 minutes?
asked on May 14, 2013 
History
How did traditionalists fight back against the age of modernism and mass soceity?
asked on January 28, 2011 
math
The Aesthetic Garden Problem. A landscape architect wants the length of a rectangular shaped flower garden to be twice the width. The garden should have a total area of 288ft^2. what are the dimensions of the garden?
asked on January 24, 2011 
Math
Suppose that the U.S. Senate consisted of 57 Republican and 43 Democratic Senators. How many different 12person committees could be formed with 8 Republican senators and 4 democratic senators?
asked on December 14, 2010 
Math
The mean salary of the female employees of one company is $29,525. The mean salary of the male employees of the same company is $33,470. Can the mean salary of all employees of the company be obtained by finding the mean of $29,525 and $33,470? Explain
asked on December 10, 2010 
Math 157
Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also
asked on December 8, 2010 
Math
two cards are drawn without replacement from an ordinary deck of 52 playing cards. what is the probability that both cards are kins if the first card drawn was a king? I was thinking it was 13/51 but not sure.
asked on December 7, 2010 
Math
Each capital letter of the alphabet is carefully printed on a piece of paper in blockform and placed in a bowl ABCDEFGHIJKLMNOPQRSTUVWXYZ An individual piece of paper is selected from the bowl. What is the probability that A. the letter is a consonant? B.
asked on December 6, 2010 
Psychology/Essay question
Dissent and altruism are a matter of personal conviction, but situation factors are involved also. Analyze five situational factors that are involved when a person decides to "rock the boat" and choose conscience over conformity. I do not understand what
asked on November 18, 2010 
Biology
Which one of the following statements about sense receptors is true? A)Chemicals, light and pressure convert stimuli into electrical implses. B) Electrical impulses within the nerve pathways trigger an awareness of stimuli in the sensory receptors
asked on August 31, 2010 
Psychology
Evolutionary psychology and behavior genetics: a) have little in common b)acknowledge the interaction of heredity and environment c)focus on learning and experience d)are two schools of thought first introduced by John B. Watson I am confused between B and
asked on August 22, 2010 
Genes
Which one of the following statements describes the relationship between genes, chromosomes and DNA a) genes, the basic unit of heredity, are located on chromosomes, which consist of strands of DNA b) genes are composed of chromosome and DNA C) chromosomes
asked on August 22, 2010 
fifth grade: subway unit
I am sitting here trying to figure out what post lessons to give fifth graders who came from a trip to the New York Transit Museum. For my first lesson, I they had to compare the trains/subways in the past to the trains/subways in the present. Do you have
asked on December 12, 2008 
math
what is the area of a figure with two sides that is 2ft and two sides that is 3/4 ft
asked on March 18, 2018 
Math
There is a school that has 6,190 students there is already 216 how many more teachers are needed?
asked on March 3, 2018 
English
Write a well organized essay in which you show how the characters relationship to the past contributes to the meaning of the work as a whole. My Question: What is it asking for?? Explain in Details Please
asked on March 1, 2017 
Math (please check my answer)
The center of dilation is (0,0) and the scale factor is 7. If A(3,4), then which is the distance between A and A'. A. 5 B. 7 C. 30
asked on November 9, 2016 
PreCalc
Since cot x = cos x / sin x, if cot x = 1/2, with the angle x in the first quadrant, then cos x = 1 and sin x = 2 (1) State true or false. Is this a possible situation? (2) If false, explain why.
asked on November 7, 2016 
math
Equation of moving point A = ( 1,3) B = ( 3, 1)
asked on May 9, 2016 
algebra 1
3 kids ages =60 if they are consecutive even integers hat are their ages
asked on June 7, 2015 
geometry
The diagonal of a square checkerboard is 2 inches long. Find the length of one side of the checkerboard
asked on January 28, 2015 
geometry
A diagonal of a square checkboard is 20 inches long. find the length of one side of the checkerboard,
asked on January 27, 2015 
chemistry
Two containers of equal volume are separated by a membrane that allows free passage of water but completely restricts passae of solute molecules. Into which compartment will water flow, or will there be no net movement of water? Which solution is at the
asked on August 8, 2013 
chemistry
A 15.0L sample of argon has a pressure of 28.0 atm . What volume would this gas occupy at 9.90 atm? Assume ideal behavior.
asked on July 29, 2013 
chemistry
A sample of an ideal gas at 1.00 atm and a volume of 1.31L was placed in a weighted balloon and dropped into the ocean. As the pressure had increased to 45.0 atm, what was the volume of the sample? Assume that the temperature was held constant.
asked on July 28, 2013 
General Biology
Darwin used which of the following terms to describe the process by which those individuals that possess superior physical, behavioral, or other attributes are more likely to pass their traits to the next generation?
asked on March 5, 2013 
Chemistry
How many moles of magnesium sulfate are needed to make in a solution of 0.10g Mg2SO4?
asked on February 26, 2013 
Chemisry
What is the % M/M concentration of 5.00 mL of methanol in 25 g solution of methanol in water? The density of methanol is 0.791 g/mL. The density of water is 1.000 g/mL. The density of the solution is 0.995 g/mL. Please show work, thank you!
asked on February 23, 2013 
physics
What is the velocity of an object that falls from a cliff tot he ground which is 20,000 centimeters below?
asked on May 22, 2012 
computers in day care
an encyclopedia on cdrom would be most appropriste for a typical tow year old, three year old, four year old, eight year old
asked on April 10, 2012 
all
Im going to college for rn. i have to take pre req. before entering the nursing program. I received my ged in 2008 can you give me advice to help me improve studying habits so that i can succeed in requirements? The subjects are
asked on February 9, 2012 
algebra
k=(2c9d)/8
asked on June 9, 2011 
social
sites to help you advertise
asked on April 28, 2011 
Math
How many combinations are there when you can buy four books from a choice of 6 books>
asked on February 8, 2011 
History
What are two other social changes that occurred during 1865 and 1945 that's not on this list: The Fourteeth Amendment Railroads City life and City culture The political machine Wilson's Fourteen Points Progressivsm World War I Pearl Harbor World War II
asked on February 8, 2011 
History
What was one of the social changes during the city life and city culture. What was one of the social changes during the Western Expansion.
asked on February 6, 2011 
History
Briefly can you tell me, What social, political, and economic changes and advances occurred during the Roaring Twenties?
asked on January 26, 2011 
Math
Evaluate 4X^3 +3Y^3, IF X=2 AND Y=5 I am not sure how to work this out
asked on January 24, 2011 
Math 157
Copy each equation in Exercises 31–33. Replace the boldface italic letter with a number that shows the relationship indicated in the table. Then copy each table and complete it by using the corresponding equation. 32. y = x + b x y 1 0 2 1 8 7 10 ? 20
asked on January 24, 2011 
Math 157
I am not sure how to do this problem Convert the units. 15 yd2 = _____ ft2
asked on January 20, 2011 
Math 157
A group of 10 students consists of 3 girls and 7 boys. How many ways can the students be arranged from left to right if the first 3 students are girls and the remaining students are all boys?
asked on January 5, 2011 
Math
A student has a penny, nickel, dime, and quarter distributed two coins apiece to his front two pants pockets. What is the probability that the front right pocket has more than 30¢ in it? Can you show all work, I am acting as a school teacher who is
asked on December 14, 2010 
Math 157
I need some help I have to Select one problem from the selfpractice exercises and teach the solution to your classmate as if they were an elementary school student. I have to explane it in full details. The selfpractice problem I chose was: Suppose that
asked on December 14, 2010 
Math
Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. 2, 5, 47, 11, 13, 48, 39, 36
asked on December 9, 2010 
Math
Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also
asked on December 8, 2010 
Math
At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
asked on December 8, 2010 
Math
At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
asked on December 8, 2010 
Math
Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that both cards are kings if the first card drawn was a king? I'm thinking its 13/51 but not sure.
asked on December 7, 2010 
Math
In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.
asked on December 7, 2010 
Math
In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.
asked on December 7, 2010 
Math
I'm not sure how to do this question. Consider the experiments involving rolling a single die once. Give the probabilities of the event described. What is P (even or prime)?
asked on December 6, 2010 
Math
Would you rather take an exam that typically has an mean of 80 with a standard deviation of 3 or an exam with a mean of 80 with a standard deviation of 15? why?
asked on December 3, 2010 
Math
Would you rather take an exam that typically has an mean of 80 with a standard deviation of 3 or an exam with a mean of 80 with a standard deviation of 15? why?
asked on December 2, 2010 
elementarymath
Do you think that the formula p=6n+1, where n, is a whole number, will produce a prime number more than 50% of the time? Give evidence to support your conclusion
asked on October 20, 2010 
elementarymath
Do you think that the formula p=6n+1, where n, is a whole number, will produce a prime number more than 50% of the time? Give evidence to support your conclusion
asked on October 20, 2010 
Biology
Which onf of the following statments about sense resceptors is trus? A) Chemicals, light and pressure convert stimuli into electrical impluses. B) Electrical impluses within the nerve pathways trigger an awareness of stimuli in the sensory receptors. c)
asked on September 3, 2010 
Biology
The left hemisphere of the brain contains regions that are: A) associated with negative emotions, such as fear and sadness B) active when language is processed C) associated with the tendency to withdraw from others D) active during the creation of art and
asked on August 31, 2010 
Biology
One part of the brain if stimulated during adolescence, will form two distint regions. The area of the brain is referred to as: A) the occiptal lobes B) the pituitary glands C) Broca's area D) the parietal Lobe I am unsure of what the answer is, although
asked on August 31, 2010 
Biology
If it happens that a neurotransmitter binds to a receptor site and produces a negative voltage, the probablity: A) that the neurons are densely connected increases B) of an excitatory response increase C)That the receiving neuron will fire decrease D)that
asked on August 31, 2010 
Biology
Janet's boss calls her into the office to discuss why see failed to complete her project for the big meeting this afternoon. Janet's sympathic nervous system: A) makes her thoughts race for an excuse B) Makes her start to perspire C) Enables her to walk in
asked on August 31, 2010 
Biology
Male erection is an example of ______. No thought or emotion is required for it to occur, but conscious control can influence it. A) peripheral nerves B) sensory nerves C) a spinal reflex D) A sexual reflex I chose choice A because the book states the
asked on August 31, 2010 
MATH/ SCIENCEHELP
1) There is a total of approximately 12.4 billion acres of agricultural land (cropland, rangeland, irrigated land) on the major continents. Given that the average Net Primary Productivity (NPP) of agricultural land is approximately 2900 kcal m2 y1
asked on November 29, 2009 
physics
A force of 40.0N is required to pull a 10.0kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden block across the same glass surface on the planet Jupiter.
asked on February 22, 2009 
editing...
"Expand and strengthen my academic and professional development." Which other word could I replace the word development with...it does not seem to work in the above sentence....
asked on January 7, 2009 
Persuasive writing....
I will be teaching my grade 5 students a lesson on persuasive writing. Do you know where I could find some sample persuasive essays to show them, especially ones that are on fifth grade level. Thanks for your help
asked on December 5, 2008 
American History
In what ways do you the progressive beliefs of using experts played a role in shaping Roosevelt¡¯s reforms? I don't really get what it means by the question, can anyone please explain it to me and give me some hints? THANKS A LOT!
asked on February 3, 2008 
math
80 cal/g x 5 g 400g/cal or 400 cal/g not sure can any one help Neither. 80 cal/g x 5g = 400 cal. The unit g cancels to leave calories. x2+2x15
asked on December 11, 2006 
verbal communication
in a business meeting in verbal communication is more tense than in a friendship communication can someone give me an example of how verbally it is different or is it just they way we talk? It has mostly to do with the level of formality in which we speak.
asked on August 12, 2006

math 4
write a sentence to describe the ratio in the context of the situation you chose. A. 1 to 2 = 1 to 2 marshmallows per cup. B. 29 to 30= 29 girls to 30 boys C. 52:12 not sure how to write this one ? asked b
posted on September 9, 2019 
Math
8.4m
posted on June 20, 2018 
algebra tricky q
Thanks
posted on May 27, 2018 
Math (please check my answer)
It's right :^)
posted on November 9, 2016 
math
56
posted on September 26, 2016 
Finance
Moore Money Inc. has a profit margin of 11% and a retention ratio of 70%. Last year, the firm had sales of $500 and total assets of $1,000. The desired total debt ratio is 75%. What is the firm's sustainable growth rate?
posted on October 14, 2015 
World history
My answer is D. If this is a Penn Foster exam, go to page 332 of your World History textbook towards the top of the page. Iltutmish, an exslave, chose his daughter, Radiyya, as his successor in 1236. I hope this helped. :)
posted on July 15, 2015 
Calculus 2 (Differential Equation)
Oops, Sqrt(1y^2) dx  sqrt(1x^2) dy = 0
posted on March 26, 2015 
Floral design
I think its C. Delphinium, but I'm not sure... Help!
posted on March 18, 2014 
chemistry
Yes I am so sorry
posted on July 29, 2013