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Posts by Catherine

Total # Posts: 433

chemistry
what mass of K2SO4 would you measure out to prepare 350 mL of a .76 M solution? The gram formula mass of K2SO4 is 174.2 g/mol

Science
What pumps blood

physics
Av/sp = 20 10 = 2m/s

Math
Austin is in his pedal boat. It takes him 1.5 hours to travel 12 miles downstream and 6 hours to return. What is the rate of the current? Please show me how to solve it as well, I really have no idea. Thanks.

chemistry
A lab technician determines the boiling point elevation of an aqueous solution of a nonvolatile, nonelectrolyte to be 1.62°C. What is the solution's molality?

Math calculus
Which box is bigger the 10*4*1 or the 6*4*3 box. Thanks.

Math
Please help me factor this, I just can't get it to work. -12x^2 - 35x - 18 Thanks!

Math
Store B has the best price. A sells for $14 per CD B sells for $13 per CD

Custer's Last Stand
I have only been around for two research days for this big project on Custer's Last Stand, and I have some information and a LOT of books, but I need quick, straightforward info that I can work around. Any solid information you know pertaining to details of Custer's ...

math
I was wondering if someone could double check my work on a test I'm self correcting. Here's the problem, it has to do with Cramer's Rule. 24x + 6y = 11 24x + 60y = -25 I ended up finding the base determinant (D), and then dividing Dx and Dy by D. My answers for Dx ...

Math
How do I find the measurement of side CDin the quadrilateral WVUT if the midpoints are F,E,D,C and WU =45 in. and TV = 31 in.?

Philosophy (arguments)
further develop the following argument: communities in which people spend a lot of time socializing with their friends and neighbors are stronger than other communities. when people have televisions they spend less time socializing with their friends and neighbors. Therefore, ...

Physics
When we lauch a space shuttle will it go with Earths rotationor would it go opposite?

physics
The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 294 kg. A person pushes down on the middle of the front ...

Chemistry
Which of the following transition metal ions has a color? Cr3+ , hg2+, v2+ How can you predict that? I don't understand!!

world history
You're right. I'm Buddhist. I should know.

Math
But the problem says the sum of the ages is 70. And yeah, it is what you could call "unusual." It's really confusing. I think that maybe the question was just typed wrong, and I'm going to ask about it on Tuesday. Thanks for the help, though! At least I know ...

Math
The sum of the ages of Monica and her mother is 70. Monica is 4 less than 1/2 her mother's age. Find their ages. I've been trying to do this for the past 20 minutes. I think the question is wrong, but try for yourself. Help please!

History
Thank you so much! I really needed it and my textbook didn't have it! Thank you!

History
When was Williamsburg, VA founded? And I don't mean when it became the capital of Virginia, I mean when was it created. People keep saying different things, but I'm pretty sure that it's either 1633 of 1632. Please help me! This is for a project.

math
how to count how long of $5000 at 7% interest compounded for the investment to increase to 10000? it will be awesome if you can put the way

Math
Thanks Damon!

Math
If 6 is increased by 4 times a number, the result is 68. A.Write and equation for this situation. B. Solve for the answer. I got 6+4x=68 for the equation, but I'm not sure whether or not x=15.5, or if that is what the question wants me to find. Help please!

Math
There are 300 students in the junior class at a high school. -100 students participate in theater. -70 students are involved in chorus. -140 students play a sport. -35 students are in chorus and are involved in theater, while 15 students play a sport and participate in theater...

English
Yay! Thanks so much!

English
Umm.... He told me? So it would be 'told my brother and me'?

English
Is this sentence correct? If not, could you point out what part is not correct? As an incentive to attend the local college, our father told my brother and I that we could use his company car for transport.

Chemistry
What are two reasons for precise but inaccurate measurements?

english
why did james welch write fools crow

Literarture
How do you write a repsonse to a novel?

Chemistry
I don't know the answer

statistics
how to get answer to geometric mean problem? data: 25.4, 9, 16, 4.25, 8.11, 19?

Math
Ramsay is standing 2906 ft away from the base of the Empire State building that is 1453 ft tall. What is the angle of elevation when she looks at the top of the building? Round to the nearest hundredth.

english
I was asking if that could be included in the analysis.

english
What does this poem mean? (tone, mood, and rhyme scheme) At the Un-National Monument Along the Canadian Border William Stafford This is the field where the battle did not happen, where the unknown soldier did not die. This is the field where grass joined hands, where no ...

Physics
Two persons A and B are walking with a speed of 4 km/h and 5 km/h respectively in the same direction. Find how far will B be from A after 3 hours ?

Math
The monthly car payments for Ted Nelson's last eight customers were $266, $285, $285, $285, $285, $315, $325, and $344. Decide whether the mode represents these data well. Explain. Please help, I think yes, because it has a mode and it makes up half of the data, but I'...

math
Why do my numbers scramble when I post math homework into my classroom forum posting box when I click on post message?

English
The question ask us to analyze this quote, "We've got all the time in the world." What does this mean? How do you explain it?

math
about $0.29

Math
Well, tell him this. A '360' is a skateboarder turning around in a circle in the air, right? tell him to imagine this skateboarder turning in a circle, but slice his movement into 4 sections, so each part of a turn looks like a quarter of a circle. Each section is one ...

child care
children should not be served drinks in containers made of a( Styrofoam c) treated ceramic B) uninsulated d) stainless steel

Physic
Two charges of equal magnitude of 2C and mass of 1.0 g are separated by a distance of 3 mm. Find the velocity of one particle when they are separated by a distance of 4mm.

chemistry
What is the concentration (m) of a solution that consists of 48 grams of copper (2) acetate dissolved in 645 mL of solution?

Geometric Proofs
how to place information to get answer of geometric mean of 25.4, 9, 16, 4.25, 8.11, 19?

statistics
Write the null and alternative hypotheses. Justify which is the claim. A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is less than 900 hours

Physics
1000 N man walks across an 8 meter plank that is suspended from two ropes(one on each side of the plank) that can only support 400N where will the man be when the plank breaks?

6th grade spelling
1. summary 9. voluntary For 3-8, think of the relationship between the first 2 words, then apply that relationship to the last 2 words. For number 3, start and begin are synonyms. Find a synonym for finish, which is conclude, and there you have it! A complete analogy! Do the ...

English 10
Ca you at least tell us what the question is asking for? What key event are they taking about? And in the story's don't really tell us what there response was after that important event, so what do we do? What i'm trying to say is can you please explain the ...

Economics
Total cost and total variable cost are parallel, yet average total cost and average variable cost are not parallel. a. Demonstrate mathematically that ATC and AVC are not parallel. b. Show mathematically that when both ATC and AVC are falling, ATC falls faster than AVC, and ...

Economics
Consider the production function Q= 20K^(1/2)L^(1/2). The firm operates in the short run with 16 units of capital. a. The firm's short-run production function is Q=? b. The average product of labor function is AP=? c. The marginal product of labor function is MP=? d. Show ...

Economics
Total cost and total variable cost are parallel, yet average total cost and average variable cost are not parallel. a. Demonstrate mathematically that ATC and AVC are not parallel. b. Show mathematically that when both ATC and AVC are falling, ATC falls faster than AVC, and ...

Statistical significance (Chi squared)Please check
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...

Please check!
Please check this!

Statistical significance test
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...

Calculating Chi Squared
did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...

Calculating Chi Squared
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...

Statistical significance (Chi squared)
I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for chi^2 is Calculating Chi Squared - Catherine, Friday, October 28, 2011 at 8:15pm I did a biology experiment where I need to analyze the ...

Calculating Chi Squared
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...

Calculating Chi Squared
I did a biology experiment and I have to use the chi^2 method to calculate statistical significance. I got data at different time points and I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for ...

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...

english
I need to do a summary paragraph on a ediorial in a newspaper or magazine .and i don't were to start in writing the paragraph and the subject i choose waw sex,slavery in america on one girls nightmare

math
1500 and 1800

algebra
2(a-4)=-2 a-4=-1 a=3

Biology
explain the progression of the atmosphere from prebiotic to its current makeup

arithmetic
State whether the following sequence is arithmetic, geometric, or neither. 10, 10.25, 10.50625, 10.76890625, .... (Points : 1) arithmetic sequence geometric sequence neither

math
A store mixes Kenyan Coffee worth $11 per Kilogram and venezuelan coffee worth $14 per Kilogram. The mixture is to sell for $12 per kilogram. Find out how much of each should be used to make a 396-Kilogram Mixture

Ciollege algebra
Suppose that X liters of 38% acid solution are mixed with y liters of a 42% solution to obtain 100L of a 39% solution. One equation in a system for solving this problem is x+y=100. Which one of the following is the other equation? A. 42x+38y=0.39*100 B 0.38x+0.42y=0.39*100 C. ...

math
Simplify and write each variable as an expression with positive exponents: ((-24x^9)/(8b^7))^4 = c((x^m)/(b^n))

Math
Jake is planning to fence his garden. His garden is 10 feet long and 5 feet wide. What is the amount of area Jake wants to fence? Is this a perimeter or area question? That's all I need.

Calculus
Yes, you are right Thanks, I just found it! =)

Calculus
Please help? Let F(a) be the area between the x-axis and the graph of y=x^2cos(x/4) between x=0 and x=a, for a>0 (consider the area to be negative if the graph lies below the axis). Find the formula for F(a).

Calculus
Let F(a) be the area between the x-axis and the graph of y=x^2cos(x/4) between x=0 and x=a, for a>0 (consider the area to be negative if the graph lies below the axis). Find the formula for F(a).

English
The answers are A,C,C,A

Mechanics
A tension test was performed on a steel specimen having an original diameter of 12.5 mm and gauge length of 50 mm. Using the data listed in the table, plot the stress–strain diagram, and determine approximately the modulus of toughness. Use a scale of 20 mm-50 MPa and 20 ...

Calculus
Sorrr, I didn't ask what to find. I have to Find the formula for F(a).

Calculus
Let F(a) be the area between the x-axis and the graph of y=x^2cos(x/4) between x=0 and x=a, for a>0 (consider the area to be negative if the graph lies below the axis).

Calculus
Let F(a) be the area between the x-axis and the graph of y=x^2cos(x/4) between x=0 and x=a, for a>0 (consider the area to be negative if the graph lies below the axis). Find a formula for F(a).

Math
what algebra

Geography
I didn't find much... But I did find the Balcones Escarpment! Is that right?

Geography
What are some major landforms by Wichita Falls, Texas?

math
I think it's 44 if you mean add the 2 digits together to get the summ.

MATH HELP!!!!!!! :(
This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and if ...

Coordinate system
XComplete the table of values for the equation 8x+2y=80 xy 0? ?0 2? that is what I got so far, please help me get the rest

Linerar Equations in 2 Variables
Complete the ordered pair for the equation y=-10x+18 I have one of the ordered numbers given to me by my instructor, I have to come up with the first one, this is excactly how he gave it to me, but I really don't understand this...Can someone please help me understand it ...

Basic Algebra
A new cruise ship line has just launched 3 new ships: the Pacific Paradise, The caribbean paradise, and the mediterranean paradise. The carribean paradise has 32 more deluxe stateroooms than the pacific paradise. The Mediterranean paradise has 37 few deluxe staterooms than ...

Basic Algebra
Thanks for the help :)

Basic Algebra
solve the equation m, and check the solution: 5/6x-1/5x+4=7/10x

Basic Algebra
solve the equation: 16((3x+7)=4(12x+8)

Basic Algebra
solve. Cx+Hy=M, for x

Basic Algebra
A box to hold pencils measures 5.8 inches by 5 inches by 4 inches high. Find the volume of the box.

Basic Algebra
if 5 is added to a number and the sum is tripled, the result is 27 more than the number. Find the number

Basic Algebra
solve the equation & check your solution: 2/5x-9/25x=5

Basic algebra
Solve the equation: 3(-2x+1)=-5(x+1)

Basic Algebra
I have to solve the following equation and check my work. Not sure how to do this if someone oculd help me out. The problem is (17b-5)-8(2b+4)=-6

Basic Algebra
I am having a hard time trying to figure out this problem, if someone could help me...I'd appreciate it: I have to solve the problem 7x-(6x+4)=4

trig
find the least positive value of @. sec (4@+10)cos(3@+17) @=theta

Physics Year 7 (Help please)
Isabella drops a chunk of iron of mass m from the roof of her high school and it accelerates at g. Then she ties two chunks of iron together of mass 2m. Show that when she drops the double chunk, the acceleration of fall is also g. Thank you :)

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