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August 27, 2014

Posts by jenna


Total # Posts: 489

Calculus 2
Find the volume of the solid obtained by revolving the graph of y=x(sqrt(1-x^2)) over [0,1] about the y-axis. How do you write the integral?
February 17, 2010

Chemistry
The phosphoric acid in a 100.00 mL sample of a cola drink was titrated with 0.1476 M NaOH. The first equivalence point was detected after 13.32 mL of base added, and the second equivalence point after 28.65 mL. Calculate the concentration of H2PO4- in mol/L. (Hint: if only ...
January 29, 2010

English
Is "in 1978" and adjective phrase then?
January 24, 2010

English
What is the modifier of the prepostional phase and what kind of prepostional phrase is it? Adverb or Adjective? 1. Its invention in 1978 revolutionized technology. 2. The microwave oven was invented in 1946.
January 24, 2010

math
There is an 8 square box, I have to put the numbers 1-8 in the eight boxes, BUT no consecutive numbers can be by each other, and cannot be by each other vertically, horizontally, or diagonally. How can the numbers 1-8 fit in there when they can't be by each other. I tried ...
January 20, 2010

Chemistry
Thanks!
January 9, 2010

Chemistry
A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NaNsubscript3 -> 2Na + 3Nsubscript2 The density of nitrogen gas is typically 1.16g/L at room temp. Calculate the number of grams of ...
January 9, 2010

math
i need help with this question.any help would be appreciated. 1.A company designs jackets that have stripes of equal width but different color.The background color of the jackets is different than the color of any of the stripes. How many different color patterns can the ...
January 5, 2010

Calc II
For the following question, we need to find the length of the polar curve: r= 2/(1-cosx) from pi/2 </= x </= pi dr/dx= -2sinx/(1-cosx)^2 therefore the length would be expressed as follows: the integral from pi/2 to pi of (sqrt)[(2/(1-cos))^2 + (-2sinx/((1-cosx)^2))^2 ...
December 13, 2009

The Bell Curve
In The Bell Curve, Richard Herrnstein and Charles Murray argued that the nation cannot come to terms with its massive social problems until it confronts the role of intelligence. "How bright someone is, is the single variable that has the largest impact on income and ...
December 7, 2009

Calc II
Perform long division on the integrand, write the proper fraction as a sum of partial fractions, and evaluate the integral: (integral of) 2y^4dy/y^3 - y^2 + y - 1 After long divison I get: (integral of)2ydy + 2(integral of)dy + (integral of) 2/y^3 - y^2 + y - 1 I keep getting ...
December 6, 2009

calc II
Express the integrals as the sum of partial fractions and evaluate the integral: (integral of) (x^2)dx/(x-1)(x^2 +2x+1) My work: The above integral is equal to x^2dx/(x+1)^2 (A/x-1) + (B/x+1) + (Cx+D)/(x+1)^2 = x^2 A(x+1)^2 + B(x-1)(x+1) + (Cx+d)(x-1) = x^2 Ax^2 + 2Ax + A + Bx...
December 6, 2009

math
3^3+4.2x8 divided by .2-(this is 3 to the third power)
December 2, 2009

foreign language
(La pintura) envía el mensaje de que hay algo más profundo de la personalidad detrás de todo el mundo que en la superficie.
November 29, 2009

psychology
Spinal cord regeneration: Given what you know about axons and dendrites (which constitute the spinal cord), do you think the findings of regeneration in rats will apply to humans? What about humans whose spinal cords are crushed, rather than severed? What about people like ...
November 20, 2009

Social studies
I need the same thing, but i can't find it. help!!!
November 6, 2009

Genetics
Given the sequence of bases in the sense strand of DNA shown below, please answer the following questions. 5'-ATGTTTCCCCAGAAGAGGTATGGGAAAAAGATTTGA-3' a. Show the sequence of bases in the messenger RNA encoded by this gene. I'm not sure what this means. I looked up...
November 4, 2009

Algebra 3
how would I write this in quadratic form? 4x to the eighth power plus 4x to the fourth power plus seven.. I am so confused..
November 1, 2009

biology
what are they differenves between eprokaryotes& prokaryotes?
October 21, 2009

6th Grade Science
hi do you know any answers about 6th grade science i am learning about right now is centimeter and millimeter if you can help me that is great Thank You
October 19, 2009

College Physics (repost)
A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block? Specifically, if you ...
October 12, 2009

Physics
A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block? Specifically, if you ...
October 12, 2009

Genetics
Show the F1 and F2 progeny phenotypic and genotypic ratios of the following dihybrid cross involving unlinked purebred Mendelian traits (tall plants, long stems X dwarf plants, short stems) under the following conditions: a. the alleles for tall plants and long stems are ...
October 7, 2009

math
Max, James, and Brett were playing basketball. One of them broke a window, and the other two saw him break it. Max said, "I am innocent." Jamess said, "Max and I are innocent." Brett said, "Max and James are both innocent." If only one of them is ...
October 5, 2009

chem
A chemist requires some 3-hexanone for a reaction, but only has some 3-hexene available. Explain using chemical reactions, how the 3-hexene could be converted to 3-hexanone. Include the conditions needed for each step. (You will need two steps).
October 5, 2009

MLA in-text citations
A professor gave us an assignment based on one of three websites. The website I chose has multiple pages, each with a title, but none of the pages have titles. When citing a fact or quotation from a certain page, should I use the page's title in the in-text citation?
October 4, 2009

Physics!!
got it! 11.879!!! Thanks didn't see the g on the .2....awesome!!!!
September 30, 2009

Physics!!
3.794 is wrong too sqrt(2(.2)(36))
September 30, 2009

Physics!!
now i getting 3.878 and it still wrong...=-(
September 30, 2009

Physics!!
This is what I done before I end up getting v=26.5887 and for some reason it's wrong =(. I not sure why though.
September 30, 2009

Physics!!
An elevator's cable snaps and its emergency brakes start gripping at the secondary line in order to slow its descent. The elevator and passengers weigh 389 kgs together and fall under the influence of gravity (9.81 m/s2). The coefficient of friction between the brakes and ...
September 30, 2009

social studies,word unscrambler
the and thats your andsexfdjwfdk
September 28, 2009

algebra
3+1/7x +5x=453/7
September 28, 2009

Genetics
A flowering plant with orange petals is self-crossed to yield the following phenotypes: red flowers- 30 orange flowers- 62 yellow flowers- 33 Choose symbols and designate the genotypes of each of the above phenotypes. I am pretty sure that the above data suggests incomplete ...
September 23, 2009

Genetics
Two traits (stem length and seed color) are simultaneously examined in a cross of two pure-breeding pea plant varieties. A tall green plant is crossed with a dwarf yellow plant, and the resulting F1 plants are self-crossed. A total of 640 F2 progeny are phenotypically ...
September 23, 2009

Calculus
I'm having trouble with the following problem: Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded above by the line y= sqrt 2, below by the curve y=secxtanx, and on the left by the y-axis. Rotate...
September 22, 2009

math
How do you write (2x3)x5=30 without changing the number sequence?
September 21, 2009

Calculus
Thank you!
September 10, 2009

Calculus
Can someone look over my work and tell me if my steps look correct? I'm trying to correct some problems that looked wrong. Instructions: Find the total areas between the given curves. 1. x= (y^3) and x=(y^2) on the interval [0,1] (integral from 0 to 1 of) ((y^3)-(y^2))dy...
September 10, 2009

Calculus
I still keep getting 4. At this step: area= int (3-2y^2-y^2) dy = int (3(y^2-1) dy shouldn't it be int(3(1-y^2)? I did this: 3int(dy)-3int(y^2)dy= 3y- (3(y^3)/3) = 3y-(y^3) from 1 to -1... filling those in, I get 4. Am I still making a mistake?
September 10, 2009

Calculus
We're doing a lab in my Calc II class and I'm stuck on this question. I tried to do it by looking at instructions for a similar question in the book, but it made me more confused. Here is the question and my work: Find the area of the region enclosed by the lines and ...
September 10, 2009

science
How would you describe how tissues form your heart?
August 24, 2009

science
How would you describe a muscle cell?
August 24, 2009

Science
How would you describe a bone cell?
August 24, 2009

calculus
I am studying for a final exam and in our review packet we have this question, which I am having trouble with: lim (x-->0) ((e^x)+x)^(1/x) I tried this problem two ways. The first was with L'Hopitals rule... lim(x-->0) (1/x)((e^x)+x)^(1/x-1) * (e^x+1) but that doesn...
May 20, 2009

math
what is the function rule for input x 1,2,3,4,5,6 and output y 1,3,5,7,9,11 Thank you very much!
May 18, 2009

math
what is the function rule for input x 1,2,3,4,5 and output 3,2,0,-1,-2
May 18, 2009

math
I really need help. Please help. Solve for x: log(subscript)3(3x+1)-log(subscript)3(x-1)=2
May 17, 2009

Calculus
For the function f(x)=10-4(x^2), find a formula for the lower sum obtained by dividing the interval [0,1] into n equal subintervals. Then take the limit as n->infinity to calculate the area under the curve over [0,1]. I only need help with the first part. I don't really...
May 5, 2009

unit rate
how do u find the unit rate
April 14, 2009

Health
it can help by showing u unhealthy thingsand can prevent younger child from getting obbese by making the parents more aware of unhealthy foods idk im only in 6th grade
April 14, 2009

unit rate
ok im having trouble with unit rates i cant seem to get them can sum 1 help me or like giv an example to me so i can do the rest of my hw and understand it
April 14, 2009

unit rate
find the unit rate 175 calories in 12 ounces
April 14, 2009

unit rate
find the unit rate $920 for 40 hours
April 14, 2009

science
wen u stop beathing
April 14, 2009

college
What is the difference between Mahayana and Theravada Buddhism?
March 9, 2009

journal article about running
i need to find a peer reviewed journal article pertaining to my chosen behavior modification project, which is to start running regularly. the article should be at least 3 pages in length and must include empirical research.
February 26, 2009

year 8 art
thanks for your help but im sorry im still stuck i don`t understand how to start the story off. ive got to write about what i think is happening in the paintings ive looked on the sites everyone has been kind enough to find . its the mona lisa and the michaelangelo im ...
December 29, 2008

year 8 art
ive got the flu and i have loads of homework to do and i am strugging with this one for my art homework i have got 4 pictures of paintings. 1/Michaelangelo, creation of Adam, 2/ Botticelli, Birth of Venus , 3/ Mona Lisa , 4/ George and the Dragon. I need to tell a short story ...
December 29, 2008

hcc
how do the masses iof electrons compare with the masses of protons?
October 29, 2008

grammar
I meant, is the date 1901 a proper noun?
September 23, 2008

grammar
Is the date "1901" a proper know?
September 23, 2008

Biology
Why does it make a difference if you measure metabolic rate in terms of O2/animal or O2/g?
September 3, 2008

Ethnic Diversity
Yeah im confused! lol i just needed some help for info. its 2 years later after yall got the help now im needing it ha
September 2, 2008

biology
why are animals shaped differently in cooler climates than in warmer ones?
August 21, 2008

Math
Can someone help me with this I am very confused When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round your answers to the nearest ...
June 29, 2008

Data management
A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of happening. Would the...
June 10, 2008

Data Management Help!
A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of happening. Would the...
June 7, 2008

Data Management, Math
Chebyshev's Theorem states that withing 2 standard deviations (regardless of the mean) that 95% of data is contained. There is also a theorem that states the minimum % of data that will lie between 2 standard deviations. Chebyshev's Theorem states that regardless of ...
June 7, 2008

statistics
mu=78 population std deviation=12 Normal Distribution n=16 alpha level=.05 * compute the power of the hypothesis test if the program has a 3-point effect. I came up with 83.88 % * compute the power of the hypothesis test if the program has a 6-point effect. I looked at the ...
June 3, 2008

math
The base is 25/16.
June 2, 2008

math
Wouldn't that be a decimal answer. Oh, and yes -3/2 is an exponent.
June 2, 2008

math
How would I simplify this problem using logs? (25/16) -3/2
June 2, 2008

Calculus
What is the volume of the region enclosed by the planes x+z = 3, y=x, y=0, z=0, and the cylinder x²+y²=1? Is the answer 5 because I keep on getting different answers for this?
May 30, 2008

Science and acrostic poems
jk...sorry i dont relly kno
May 27, 2008

Science and acrostic poems
BOO!
May 27, 2008

math
How do multiply mixed numbers and fractions
May 21, 2008

Probability. NEED HELP!!!
figure out how many cards are in a deck {52} then take the number of cards in a deck and compare it to the numbers of cards in a four of a kind {4}
May 21, 2008

Data Management, Math
Thank You Very Much!!! Very Much Appreciated!!!
May 13, 2008

Data Management, Math
10 of your friends (including you..so 10 altogether) are going to have a draw between all of you. Each person gives $10 (for a total of $100). There will be five, $20 draws. One per week for 5 weeks. For the first draw, every person gets a ticket. One ticket is picked from 10 ...
May 13, 2008

math
calculate (x-3)(x+2)
May 7, 2008

Science
Name and describe two ways in which magnetism is used in technology related to medicine? Im really not sure of the answer to this, but i do know that magnetism is the force of attraction or repulsion.
April 7, 2008

Geometry
wow, that was simple! thanks so much!
April 2, 2008

Geometry
What is a vertex? for example, there is a triangle with the point of it circled. the book asks if it's a vertex. i looked it up on google and dictionary, but i don't get it. thanks for any help!
April 2, 2008

science
What is the corrected radiocarbon age if the orginal radiocarbon age is 2100?
March 7, 2008

English
I'm a little confused about making something possessive. For example, if I were to write America's history is fascinating. would that be correct, or would "Americas", or "Americas'" be right? Also, suppose you wanted to say that a dog belonged ...
March 4, 2008

prefix and suffix
This is the worst website ever it won't listen to you and it's no help about prefixes
March 2, 2008

ict
i need to design a luggage tag for ict homework but i don`t know what is written on the tag. i know you put your name but else is needed. thanks for your help
February 29, 2008

United States
I need to know what the difference is between a commonwealth (Puerto Rico) and a territory (Guam) of the United States. If anyone could help, that would be great!
February 28, 2008

Math
Another way to do it would be 5.50 divided by 2 to find the price of one t-shirt, then that number times 5.
February 28, 2008

Physics
so it would be: (retarding force)(1020m)= (1/2)(8042N)(35 m/s) and the retarding force= 137.98?
February 25, 2008

Physics
Given: g=9.81 m/s square. The parachute on a race car that weighs 8042 N opens at the end of a quarter-mile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance of 1020 m? Answer in units of N. I have no...
February 25, 2008

Physical science
When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what is the ...
February 17, 2008

math
i need help w/ math and parentheses here is the question: 5=3+4-2/1 and i have to add parentheses.
February 7, 2008

SCIENCE
yeah like how do they relate 2 science??
February 1, 2008

SCIENCE
science concept map!! test tubes matter oxygen please please please please HELP!!
February 1, 2008

Science
how do test tubes relate to science??
February 1, 2008

create a country
I am supposed to create my own country and I need to come up with a creative name for it. Any ideas?
December 18, 2007

Chemistry
why do some combinations of ionic compounds form a precipitation while others do not
December 2, 2007

Chem
Thank you.
November 26, 2007

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