Monday

April 21, 2014

April 21, 2014

Post a New Question | Current Questions

**College Algebra**

Pythagorean Theorem: x^2 + 12^2 = 28^2 Solve for x.
*Friday, February 8, 2013 at 10:40am*

**english (theses writing)**

hello! :) I am a freshman college student and I am looking for a thesis topic about civil engineering.Can you give me a topic on my thesis about civil engineering? thanks :)
*Friday, February 8, 2013 at 7:39am*

**College Algebra**

The base of a 28 foot ladder is placed 12 feet from the house. How far up house does the ladder reach? (The answer to the nearest tenth of a foot
*Friday, February 8, 2013 at 12:28am*

**College Algebra**

The length of a rectangular carpet is 6 feet greater than twice its width. If the area is 72 square feet, find the carpet's length and width.
*Friday, February 8, 2013 at 12:13am*

**College Algebra**

The distance, d, in feet that an object falls in t seconds is modeled by the formula d=16t(2) if you dive from a height of 128 feet, how long will it take to hit the water? (answer may be in simplified radical form).
*Friday, February 8, 2013 at 12:08am*

**Math**

Quantitative data can be divided into smaller parts, where categorical data cannot. They are all correct except years of education. If someone was attending the first semester of college, would you say he had 12.25 years of education?
*Thursday, February 7, 2013 at 5:41pm*

**college algebra**

The question was: Determine when the median income was $42,303 Your answer does not fit the question. You started off right (I think). The posting is sort of garbled. 42303 = 1144.7(x-1990) + 35834 1144.7(x-1990) = 42303-35834 1144.7(x-1990) = 6469 x-1990 = 5.65 x = 1995.65 so...
*Thursday, February 7, 2013 at 11:53am*

**urgent urgent urgent**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. •Explain the chemical process that occurred ...
*Thursday, February 7, 2013 at 11:42am*

**college algebra**

if the numbers are a and b, a-b is positive if a>b a-b is negative is a<b
*Thursday, February 7, 2013 at 11:41am*

**college physics**

A person desires to reach a point that is 5.20 km from her present location and in a direction that is 43° north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she could travel to reach her ...
*Thursday, February 7, 2013 at 11:05am*

**college physics**

a rice grain is sitting on top of an apple, it slides down. where does it come off the apple? assuming the apple is a frictionless sphere. Find the angle with respect to the vertical diameter of the apple.
*Thursday, February 7, 2013 at 2:57am*

**college algebra**

I you are given two real numbers, explain how to determine which one is lesser.
*Thursday, February 7, 2013 at 1:09am*

**college algebra**

Median family income in country x between 1990 and 1999 can be modeled by f(x)=1144.7(x-1990)+35,834 where x is the year. Determine the median income was $42,303. I did it this way don't know if it's right f(x)=1144.7(x-1990)+35,834 42,303-35,834 = 1144.7 - (x-1990) + ...
*Wednesday, February 6, 2013 at 11:26pm*

**college algebra**

Median family income in country x between 1990 and 1999 can be modeled by f(x)=1144.7(x-1990)+35,834 where x is the year. Determine the median income was $42,303. I did it this way don't know if it's right f(x)=1144.7(x-1990)+35,834 42,303-35,834 = 1144.7 - (x-1990) + ...
*Wednesday, February 6, 2013 at 11:03pm*

**urgent urgent urgent**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. explain the process the muscle go through
*Wednesday, February 6, 2013 at 9:11pm*

**college**

this is what i believe about myself as i was grown up and what i believe
*Wednesday, February 6, 2013 at 7:45pm*

**college algebra**

from y = 5 - 2x y = -2x + 5 , (why did you switch the signs in yours ???) the slope is -2 so the slope of the new line is 1/2 y = (1/2)x + b sub in the point (4,1) 4 = (1/2)(1) + b 4 - 1/2 = b b = 7/2 new equation is y = (1/2)x + 7/2
*Wednesday, February 6, 2013 at 7:35pm*

**College Algebra**

Kev probably meant 3xy^3 cuberoot(xy) or 3xy^3 (xy)^(1/3)
*Wednesday, February 6, 2013 at 7:26pm*

**college algebra**

Passing thru point (1,4); perpendicular to 2x+y=5 How do I solve this? I think it might be this but not sure please let me know what step I left out Thanks:-) 2x+y=5 y=5-2x y=2x-5 M1=2 4=-1/2(1)+c=1+c C=4 Y=-1/4x-1
*Wednesday, February 6, 2013 at 7:07pm*

**College Algebra**

3xy^4sqt.xy
*Wednesday, February 6, 2013 at 6:38pm*

**College Algebra**

cubic root of 27x^4 y^13
*Wednesday, February 6, 2013 at 6:16pm*

**college enlish comp 1**

how to write a persasvie eassy on art is therapeutic
*Wednesday, February 6, 2013 at 9:59am*

**Physical Science**

I studied this 2 years ago in college and am no back in school. I can't remember any of this stuff and I really need to figure it out. Please Help Me!! The Latent Heat of Vaporization for water is 540. cal/g. How much heat (in calories) must be added to 10.0 g of water at ...
*Tuesday, February 5, 2013 at 10:05pm*

**College Algebra**

factor by grouping x^2(x-5) + 4(x-5) > 0 (x-5)(x^2+ 4) > 0 x^2 + 4 is always positive, so for the whole thing to be positive x-5 > 0 x > 5 express it in the form you were taught.
*Tuesday, February 5, 2013 at 8:35pm*

**College Algebra**

x^3-5x^2+4x-20 > 0 interval notation
*Tuesday, February 5, 2013 at 7:38pm*

**college matematics**

12/52? you missing a heart?
*Tuesday, February 5, 2013 at 6:16pm*

**college matematics**

sorry I didn't spell check before submitting I meant mathematics
*Tuesday, February 5, 2013 at 4:39pm*

**college matematics**

What is 12/52? What is matematics?
*Tuesday, February 5, 2013 at 4:37pm*

**college matematics **

you are dealt one card from a standard 52 card deck find the probability of being dealt a heart
*Tuesday, February 5, 2013 at 4:33pm*

**college physic**

The cross-sectional areas are circular so that ; therefore,
*Tuesday, February 5, 2013 at 12:57pm*

**College Algebra--Still Confused**

I am only going to do one, 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, or two complex roots. x^2-4x=5 a.) Two rational roots b.) one repreated root c.) two complex roots d.) two irrational ...
*Tuesday, February 5, 2013 at 11:27am*

**College Algebra--Still Confused**

In google type: quadratic equation online When you see list of result click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page be open in rectangle type your equation and cilck option: solve it! You will see solutions step-by step and discriminant ...
*Tuesday, February 5, 2013 at 11:23am*

**College Algebra--Still Confused **

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, ...
*Tuesday, February 5, 2013 at 11:18am*

**college chem**

Note the correct spelling of celsius. There are two equations you need to do this. 1. WITHIN a phase, q = mass x specific heat x (Tfinal-Tinitial) 2a. At the phase change, q = mass x heat fusion at melting point or 2b. At the boiling point, q = mass x heat vaporization. For ...
*Monday, February 4, 2013 at 11:35pm*

**college chem**

Fe is a bcc. mass unit cell = 2*atomic mass Fe/6.02E23 = ?
*Monday, February 4, 2013 at 11:30pm*

**college chem**

2*atomic mass Eu/6.02E23 = ?
*Monday, February 4, 2013 at 11:26pm*

**college chem**

q = mass H2O x heat vaporization
*Monday, February 4, 2013 at 11:25pm*

**College Algebra**

All these are based on the following concept (should be in your text) for ax^2 + bx + c = 0 if b^2 - 4ac < 0 there are two imaginary or complex roots if b^2 - 4ac = 0 , there is one root, (one repeated root) if b^2 - 4ac > 0 , there are two distinct and real roots if for...
*Monday, February 4, 2013 at 11:11pm*

**college chem**

calculate the amount of energy (in kj) necessary to convert 457 g of liquid water from 0 Celecius to water vapor at 167 celcius. the molar heat of vaporization (Hvap) of water is 40.79 jk/mol. the specific heat for water is 4.187 j/g celcius and for steam 1.99 j/mol celcius. (...
*Monday, February 4, 2013 at 11:03pm*

**college chem**

metallic iron crystallizes in a cubic lattice. The unit cell edge length is 287 pm. The density of iron is 7.87 g/cm^3. Calculate the mass (in grams) of one unit cell
*Monday, February 4, 2013 at 11:02pm*

**college chem**

europium crystallizes in a body-centered cubic cell (the Eu atoms occupy only lattice points). calculate the mass of the unit cells
*Monday, February 4, 2013 at 11:02pm*

**college chem**

calculate the amount of heat (in kj) required to convert 140.1 g of water to steam at 100c
*Monday, February 4, 2013 at 11:01pm*

**college**

Shut. Up.
*Monday, February 4, 2013 at 9:55pm*

**College Algebra**

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, ...
*Monday, February 4, 2013 at 9:21pm*

**ALGEBRA**

From a survey of 100 college students, a marketing research company found that 50 students owned iPods, 30 owned cars, and 20 owned both cars and iPods.
*Monday, February 4, 2013 at 8:58pm*

**College Algebra help!!!**

Thank you so much this makes the examples provided make much more scense the way you broke them down! Thanks!
*Monday, February 4, 2013 at 8:03pm*

**College Algebra help!!!**

x^2/3-2x^1/3-15=0 (x^(1/3))^2 - 2x^(1/3) - 15 = 0 suppose we let x^(1/3) = y, then we get y^2 - 2y - 15 = 0 (y-5)(x+3) = 0 y = 5 or y = -3 then x^(1/3)= 5 , cube both sides x = 125 or x^(1/3) = -3 x = -27 2. x+4 = 7√(x+4) square both sides x^2 + 8x + 16 = 49(x+4) x^2 + ...
*Monday, February 4, 2013 at 7:52pm*

**College Algebra help!!!**

I have to solve each equation using a u substitution and need help understanding how to do this. The first equation is: 1. x^2/3-2x^1/3-15=0 2. x+4=7 Squareroot x+4
*Monday, February 4, 2013 at 7:44pm*

**college chemistry**

mols = grams/molar mass You know mols and molar mass; solve for grams.
*Monday, February 4, 2013 at 12:53pm*

**college chemistry**

How many grams would you weigh out to get 3.1 X 10-3 Moles of MgCl2?
*Monday, February 4, 2013 at 12:26pm*

**college mathematics**

In that case I don't know how to answer the question. Perhaps somebody else can shed some light on it.
*Monday, February 4, 2013 at 11:25am*

**college mathematics**

Sorry I meant how the question is worded.
*Monday, February 4, 2013 at 11:07am*

**college mathematics**

Reiny I just read your replies but this is hoe the question is worded. That is why I myself do not understand it
*Monday, February 4, 2013 at 11:07am*

**college mathematics**

Carol, you have now posted this question 3 times I had some reservations and concerns about it http://www.jiskha.com/display.cgi?id=1359762525 You never cleared up any of these concerns, and reposted it exactly the same way. It is still equally confusing. Did you not ...
*Monday, February 4, 2013 at 10:53am*

**college mathematics **

Three people are to be selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person selected gets the third ...
*Monday, February 4, 2013 at 10:30am*

**college algebra**

Y/X = 3/2)/10 = 3/20. Y/X = 3/20. Y/(1/2) = 3/20. 2y = 3/20 Y = 3/40.
*Sunday, February 3, 2013 at 10:57pm*

**college algebra**

(-6,-9), (0,8). m = (8+9)/(0+6) = 17/6. Y = mx + b (17/6)*0 + b = 8 b = 8. Y = (17/6)x + 8.
*Sunday, February 3, 2013 at 10:08pm*

**PLEASE CHECK THESE ANSWERS AMERICAN GOV**

1. The nerve center of the American Presidency is (C) the President’s Cabinet. the Executive Office of the President. the Congressional houses. the Civil Service. 2. Presidential elections include all of the following except (D) participatory caucuses. primary elections. ...
*Sunday, February 3, 2013 at 3:01pm*

**statistics**

1. The scores on a standardized test for high school students are normally distributed with a population mean of 500 and a population standard deviation of 100. Use the empirical rule (0LI refers to this as the standard deviation rule.). Make sure you provide graphs for each ...
*Sunday, February 3, 2013 at 12:26pm*

**Community technical college**

a10=a1+r(10-1) 14=7+r(9) r=7/9 check 7, 7 7/9, 7 14/9, 7 21/9, 7 28/9, 7 35/9, 7 42/9, 7 49/9, 7 56/9, 14 Use the formulas for sum, knowing r, a1
*Sunday, February 3, 2013 at 10:58am*

**Community technical college **

Given that 1st term of an A.P is 7 and it's 10th term is twice the second term,calculate the (a) 19th term (b)sum of 28 terms (c) difference between 9th and 6th terms
*Sunday, February 3, 2013 at 9:16am*

**college general chemistry**

That should have been the question that I asked instead of posting the correct answer with the number of correct sig figs. Dr. Bob222 is excellent, and I l have been learning from him as well.
*Sunday, February 3, 2013 at 1:04am*

**college general chemistry**

it's right thank you so much so i just need to learn my significant figures yeah
*Sunday, February 3, 2013 at 12:58am*

**college general chemistry**

it's right thank you so much so i just need to learn my significant figures yeah
*Sunday, February 3, 2013 at 12:58am*

**college general chemistry**

Good. You also learned something else. If you had typed in your work about 2.5 hours ago when we first responded, we would have caught the error then and you would have saved more than 2 hours of your valuable time.
*Sunday, February 3, 2013 at 12:56am*

**college general chemistry**

it's right thank you so much so i just need to learn my significant figures yeah
*Sunday, February 3, 2013 at 12:51am*

**college general chemistry**

I suspect you typed in too many significant figures. 8.25 x 0.750 = 6.18750 cc. You are allowed three significant figures (0.750 has three and 8.25 has three so three it is. So you round 6.18750 to three places. I would round that to 6.19 cc. Try 6.19 cc. That's the right ...
*Sunday, February 3, 2013 at 12:47am*

**college general chemistry**

I am so lost I imput 6.188 because it's online homework and it said my answer was wrong you don't have to convert because it has the spot where you put the answer then cm^3
*Sunday, February 3, 2013 at 12:37am*

**to Amber---college general chemistry**

Don't leave us in the dark. Saying it is wrong without showing your work leaves us with no alternative but to ignore your post. Show your work and we can find the error. The correct answer is 6.1875 cc but you must round that to the correct number of significant figures.
*Sunday, February 3, 2013 at 12:20am*

**college general chemistry**

google, area* thickness= volume and relook at the problem to come up with an answer.
*Saturday, February 2, 2013 at 11:37pm*

**college general chemistry**

Unless they asked you to convert it to different units, I am not sure what to tell you at this time.
*Saturday, February 2, 2013 at 11:34pm*

**college general chemistry**

The volume of a rectangular solid is w*l*h= cm*cm*cm=cm^3 I calculated 6.19cm^3, is this what you calculated when performing the calculations?
*Saturday, February 2, 2013 at 11:31pm*

**college general chemistry**

Devron thats not right it said incorrect
*Saturday, February 2, 2013 at 11:17pm*

**college algebra**

Find y when x=1/2, if y=3/2 when x=10 How do you work this?
*Saturday, February 2, 2013 at 11:06pm*

**college general chemistry**

0.750cm*8.25cm^= volume in cm^3
*Saturday, February 2, 2013 at 10:34pm*

**college general chemistry**

Calculate the volume of a rectangular solid with a thickness of 0.750 cm and an area of 8.25 cm2
*Saturday, February 2, 2013 at 10:22pm*

**college algebra**

y = x/2 in this case. Your answer is correct.
*Saturday, February 2, 2013 at 10:17pm*

**college algebra**

Direct variation Find y when x=5, if y=7 when x=14 I think the answer is 2.5 but don't know for sure:-)
*Saturday, February 2, 2013 at 9:55pm*

**college algebra**

This makes no sense to me.
*Saturday, February 2, 2013 at 8:38pm*

**college algebra**

Slope intercept Vertical, passing (5,-1) Do you solve like this? M1= m/5-5m M=5
*Saturday, February 2, 2013 at 8:31pm*

**college algebra**

Write slope-intercept equation Passing thru the points (-6,-9) and (0,8) I think it's this just making sure: M=(8-(-9))/(0-(-6)) =17/6 Y= -17/6x+36/6 Y=-17/6x-6 M=17/6 and Y=-6
*Saturday, February 2, 2013 at 7:38pm*

**college physcs**

0.854m/s
*Saturday, February 2, 2013 at 5:41pm*

**Math**

A random sample of 42 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the .99 degree of confidence, what is the confidence interval for the population mean?
*Saturday, February 2, 2013 at 3:20pm*

**basic college math**

14 825/1000 = 14 33/40
*Saturday, February 2, 2013 at 12:35pm*

**basic college math**

write 14.825 as a faction
*Saturday, February 2, 2013 at 12:32pm*

**basic college math**

Divide the numerator by the denominator. 4/13 = 0.3076923
*Saturday, February 2, 2013 at 11:53am*

**basic college math**

what is 4/13 written as a decimal?
*Saturday, February 2, 2013 at 11:52am*

**college chem**

I apologize. Everything that I told you was correct except for the X axis. The X axis is T not V, so starting to where I misstated, slope intercept form is y=mx+b. The gas law is PV=nRT. The graph is a plot of P vs. T, so we will isolate P on one side of the equal sign and let...
*Saturday, February 2, 2013 at 4:45am*

**college chem**

Slope intercept form is y=mx+b. The gas law is PV=nRT. The graph is a plot of P vs. T, so we will isolate P on one side of the equal sign and let that be Y and 1/V is our x, since plotting P vs 1/V is the only way to obtain a straight line. Rearrange, P=nRT/V + 0 is our ...
*Friday, February 1, 2013 at 5:39pm*

**College Algebra**

3x^4 - 648x = 0 divide by 3 x^4 - 216x = 0 x(x^3 - 216)=0 x = 0 or x^3-216=0 if you want only real solutions then from x^3=216 x = 6 however, if you want complex roots at well ..... x^3 - 216 = (x-6)(x^2 + 6x + 36) = 0 x= 6 , we already know that or x = (-6 ±√-108...
*Friday, February 1, 2013 at 2:53pm*

**College Algebra**

3x^4=648x someone help please im so confused. i am trying to find the solution set?
*Friday, February 1, 2013 at 12:26pm*

**college chem**

I am still very confused
*Friday, February 1, 2013 at 10:28am*

**college chem**

Thank you but I am not sure what you mean by derive it
*Friday, February 1, 2013 at 7:07am*

**college chem**

The slope will be nRT. You will have to use the ideal gas law to derive this.
*Friday, February 1, 2013 at 2:57am*

**college chem**

A researcher explores the ideal gas equation. He measures the pressure of a system at different temperatures ( keeping the volume and moles of the gas constant) and creates a plot of P versus T. What is the slope of the line that results if the volume is 1.0L when 1.0 mol of ...
*Friday, February 1, 2013 at 12:09am*

**college algebra**

F increases when x is positive and F decreases when x goes negative. F(x) = 3x + 3. F(2) = 3*2 + 3 = 9. (3,9). F(-2)=3*(-2) + 3 = -6 + 3=-3. (-2,-3).
*Thursday, January 31, 2013 at 9:00pm*

**College Chemistry**

a mixture of 2.0 mol of co and 2.0 mol of h2o was allowed to come to equlibrium in a 1l flask at high temperature. if kc=4.0 what is the molar concentration of h2 in the equlibrum mixture? Co(g)+ H20 (g) ---> Co2 (g) + H2
*Thursday, January 31, 2013 at 3:07pm*

**college algebrea**

(3x)/(x+2)=9-(6)/(x+2)
*Wednesday, January 30, 2013 at 10:37pm*

**Statistics**

Lol mate. This question is too long to be answered by us. Do it yourself, this is college level stuff.
*Wednesday, January 30, 2013 at 6:32pm*

**Ohio Christian University**

You're a college student???? What additional information do you think we need to solve this problem?
*Wednesday, January 30, 2013 at 4:36pm*

Pages: <<Prev | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | **22** | 23 | 24 | 25 | 26 | 27 | 28 | Next>>

Post a New Question | Current Questions