Friday

April 18, 2014

April 18, 2014

Post a New Question | Current Questions

**college physics 1**

Ww = m*g = 29.2kg * 9.8N/kg = 286.2 N. = Wt. of the wood. Fp = 286.2*sinA = Force parallel to incline. Fv = 286.2 *cosA = Force perpendicular to incline. 286.2*sinA-0.51*286.2*cosA = m*a 286.2*sinA -146*cosA = m*0 = 0. 286.2*sinA = 146*cosA Divide both sides by cosA: 286.2*(...
*Friday, February 15, 2013 at 8:09pm*

**college algebra**

Axis of symmerty x=3 passing thru (3,1) and (1,9) What is the best way to solve?
*Friday, February 15, 2013 at 7:32pm*

**algebra story problem**

I just answered this one above for someone that posted as "college student"
*Friday, February 15, 2013 at 5:37pm*

**College Math**

What is the PROCUREMENT cost of the below system? Cost Types Cost (in millions) Research/Development $400 Procurement of Prime mission $800 Procurement of support equipment $100 Procurement of Initial Spares $100 Operations & and Support $70,000 Disposal $100 ANWERS! (a) 800 ...
*Friday, February 15, 2013 at 3:59pm*

**math algebra **

the length of a rectangular photograph is 11 in. more than the width. if the area is 80in^2 what are the dimensions of the photograph ? the width is___ in. and the length is___ in.
*Friday, February 15, 2013 at 3:51pm*

**Math algebra **

the length of a rectangular photograph is 8in. more than the width. if the area is 560 in^2 what are the dimensions of the photograph? the width is____ in. and the length is ____ in.
*Friday, February 15, 2013 at 3:31pm*

**Copperbelt international college**

Draw a diagram. If the angle subtending the chord is x, sin(x/2) = 2.8/3.5 = 0.8, so x/2 = 0.927 The area of a segment is 1/2 r^2 (x-sinx) So, the smaller segment has area 1/2 * 3.5^2 * (2*.927-.8) = 6.46 The area of the whole circle is pi * 3.5^2 = 38.48 so, the area of the ...
*Friday, February 15, 2013 at 4:57am*

**Copperbelt international college **

A chord PQ of length 5.6cm divides a circle of radius 3.5cm into two segments.calculate the difference in areas between major and minor segment in the circle of chord PQ.
*Friday, February 15, 2013 at 1:07am*

**college physics 1**

The coefficient of static friction between a block of wood of mass 29.2-kg and a rough table is 0.51. The table is slowly tilted until the block of wood starts to slide down the surface. At what angle of the table with respect to the horizontal does the wood start to slide? ...
*Thursday, February 14, 2013 at 3:21pm*

**college algebra**

it will break down to 2 cases: x+3 = 2-x OR x+3 = -2+x 2x = -1 x = -1/2 or x+3 = -2+x 5 = 0 , not very likely, so no solution from that part x = -1/2 check: LS = |-1/2 + 3| = |2.5| = 2.5 RS =|2 - (-1/2) | = |2.5| = 2.5 = LS my answer is correct
*Wednesday, February 13, 2013 at 8:57pm*

**college algebra**

Solve equation |x+3|=|2-x| Not sure which way to go to solve. Thanks
*Wednesday, February 13, 2013 at 7:28pm*

**college chemistry 101**

why does an opened bottle of carbonated water keep its frizz longer if kept in a refrigerator than if left at room temperature?
*Wednesday, February 13, 2013 at 4:03pm*

**college algebra**

since |x| = x if x >= 0, and -x if x<0, either (4+2x) - 3 > 5 or -(4+2x) - 3 > 5 so either 4+2x-3 > 5 2x+1 > 5 2x > 4 x > 2 or -4-2x-3 > 5 -2x - 7 > 5 -2x > 12 x < -6
*Wednesday, February 13, 2013 at 3:01pm*

**college algebra**

Solve absolute value inequality, use interval notations. |4+2x|-3> I know the answer is x>2 or x<-6 But I'm unsure how to solve it. Thanks
*Wednesday, February 13, 2013 at 2:57pm*

**College**

p = mv = 10 * 10 = 100 a = ∆v/∆t = (20-0)/4 = 5 F = ma = 10*5 = 50 When you are only given a few pieces of data, your formulas will be relatively simple.
*Wednesday, February 13, 2013 at 12:49pm*

**College**

A bod of 10kg is traveling in straight line at 10m/s (a)what is de momentum?(b)what is de average force required to increase its velocity 4rom zero to 20m/s in 4seconds?
*Wednesday, February 13, 2013 at 9:28am*

**maths **

the heights of female students at a particular college are normally distributed with the mean 169 cm and standard deviation 9 cm. 1) Given that 80% of these female students have a height less than h cm ,find the value of h. 2) Given that 60% of these female students have a ...
*Wednesday, February 13, 2013 at 7:11am*

**college trigonometry**

LS = (sinx/cosx - cosx/sinx)/(sinxcosx) = [(sin^2x - cos^2x)/(sinxcosx)]/sinxcosx = (sin^2x - cos^2x)/(sin^2x cos^2x) =sin^2x/(sin^2xcos^2x) - cos^2x/(sin^2xcos^2x) = 1/cos^2x - 1/sin^2x = sec^2x - csc^2x ≠ RS you have a typo, your right side should have been sec^2x - ...
*Tuesday, February 12, 2013 at 11:41pm*

**college trigonometry**

verify identity: (tanx-cotx)/sinxcosx=sec^2x csc^2x
*Tuesday, February 12, 2013 at 11:28pm*

**college chemistry**

If i have a highly polar mobile phase, what will happen to the non-polar or less polar compounds during chromatography? will they move less up the TLC plate or actually even more because the mobile phase itself is so polar.
*Tuesday, February 12, 2013 at 6:45pm*

**college Mathematics**

Just draw a Venn diagram. There are 3 regions, we'll call them m,s,r, with overlapping regions labeled, ms,mr,rs,mrs. Now start filling them in, from the inside out mrs = 3 rs = 7-3 = 4 mr = 10-3 = 7 ms = 13-3 = 10 m = 34-(3+7+10) = 21 r = 20-(3+4+7) = 6 s = 27-(3+4+10) = ...
*Tuesday, February 12, 2013 at 10:34am*

**college Mathematics **

I have been trying to figure this out for day's please help if you can. A survey of 59 customers was taken at a book store regarding the type of novels purchased. The survey found 34 customers purchased mysteries, 27 purchased science fiction, 20 purchased romance novels, ...
*Tuesday, February 12, 2013 at 10:21am*

**finance**

1. The target structure for QM industries is 38% common stock, 15% preferred stock, and 47% debt. If the cost of common equity for the firm is 17.3%, the cost of preferred stock is 9.3%, the before tax cost is 8.9%, and the firms tax rate is 35%, what is the QM's weighted ...
*Tuesday, February 12, 2013 at 10:01am*

**College Physics 2**

A parallel-plate air capacitor is made from two plates 0.250 m square, spaced 0.70 cm apart. It is connected to a 140 V battery. a) What is the capacitance? C = 7.90×10−11 F b) What is the charge on each plate? Enter your answer as an absolute value of charge. Q = ...
*Monday, February 11, 2013 at 9:09pm*

**college chemistry===>Organic Chem Lab.**

It depends on what you are separating; polar attracts polar, and polar repels nonpolar.
*Monday, February 11, 2013 at 6:17pm*

**college chemistry**

How will the Rf values be affected if i use a highly polar mobile phase instead of one that has intermediate polarity?
*Monday, February 11, 2013 at 4:51pm*

**college algebar**

Do you mean x - 2 divided by 6 or x -2/6 I think you probably mean (x-2/6 If that is correct, then multiply each part by 6 and then add 2 to each part. That will leave x in the middle. I call these the "sandwich problem" because x is sandwiched betweent the lower and...
*Monday, February 11, 2013 at 2:26pm*

**college algebar**

5< x-2/6 <6
*Monday, February 11, 2013 at 1:26pm*

**Business Calculus**

Pam and Tim decide to start saving money for their daughter's college education. They open a college savings plan (529) with a 500 dollars initial investment and next month start to make monthly deposits of 120 dollars. If the account pays 8% compounded monthly, how much ...
*Monday, February 11, 2013 at 1:56am*

**college algebra**

Assume the > signs are really ¡Ý We will change them later. Subtract 9.1 from each term in the inequality -7.6 < -0.5x < -2.3 Double each term -15.2 < -x < -4.6 Multiply each term by -1, changing the directions of the < signs, 4.6 > x > 15....
*Sunday, February 10, 2013 at 1:00pm*

**college algebra**

Need to solve what are the steps to do so? 1.5<9.1-0.5x<6.8. <they are underlined. Thanks
*Sunday, February 10, 2013 at 12:47pm*

**college algebra**

I need to figure out how to solve this equation your help will be much appreciate:-) √5(x-1.2)-√3x<5(x+1.1)
*Sunday, February 10, 2013 at 12:45pm*

**STAT**

Functional foods are those containing nutritional supplements in addition to natural nutrients. Examples include orange juice with calcium and eggs with omega-3. Kolodinsky, et al. (2008) examined attitudes toward functional foods for college students. For American students, ...
*Sunday, February 10, 2013 at 1:46am*

**STAT**

Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer, and Catanese (2003) examined the importance of food as a source of pleasure versus concerns about food associated with ...
*Sunday, February 10, 2013 at 1:43am*

**college algebra**

Please show me the steps to solving this equation:-) √5(x-1.2)-√3x<5(x-1) Your help is greatly appreciated.
*Sunday, February 10, 2013 at 1:03am*

**College Algebra**

I will assume at equilibrium, Supply = Demand q^2 + 100000 = 45q q^2 - 45q + 10000 = 0 This equation has no real solution. (I guess I don't understand this topic well enough)
*Saturday, February 9, 2013 at 10:42pm*

**college chem**

Show your work and I'll try to find the error.
*Saturday, February 9, 2013 at 8:09pm*

**College Algebra**

Hello - I am stuck on this problem and I'm in serious need of some help. I don't understand this question at all. The problem is: Find the equilibrium quantity and equilibrium demand function for the given: Supply: P=45q Demand: P=q^2+10,000
*Saturday, February 9, 2013 at 7:40pm*

**College Physics**

Total Acceleration will consist of Centripetal (which is in the same direction as the r vector) and Tangential (which at any given moment will be your retarding one. With that we can set up a triangle that gives us the angle needed. Since we don't know radius we can use V=...
*Saturday, February 9, 2013 at 7:27pm*

**College Physics**

bobpursley's answer is wrong. The question isn't a satellite revolving earth anyways.
*Saturday, February 9, 2013 at 6:58pm*

**college chem**

Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?
*Saturday, February 9, 2013 at 5:42pm*

**college algebra**

3x-2y = 8 -2y = -3x+8 y = 3/2 -4 slope = 3/2 2y + 3x = -4 2y = -3x -4 y =-3/2 -2 y-intercept = -2 Now use y = mx + b to write your equation
*Saturday, February 9, 2013 at 1:58pm*

**college algebra**

Write an equation of the line parallel to the line given by 3x-2y=8 and having the same y-intercept as the line given by 2y+3x=-4 (show work) I am stuck with this problem. Can you please show me how to do these types of equations? Thank you
*Saturday, February 9, 2013 at 1:53pm*

**7th grade language arts Ms. Sue please**

oh no! Actually it was "a webpage on the evolution of dogs written by a college professor"
*Friday, February 8, 2013 at 7:51pm*

**College Algebra**

If the length of molding to create the frame is 96 inches. If the frame surrounding the picture is 3.5 inches wude and the length is 6 inches longer than the width, what are the dimensions (length and width) of the picture that could be placed inside?
*Friday, February 8, 2013 at 6:23pm*

**College Algebra **

for the sets {1,3,5,7,9} and {1,2,3,4,5} Define the ¿ and the U.
*Friday, February 8, 2013 at 6:15pm*

**7th grade language arts Ms. Sue please**

1. Which of the following is not a part of evaluating sources? (1 point) checking the author's credentials questioning possible bias making sure the information is current agreeing with the author's opinions 2. Which of the following websites would you most likely use ...
*Friday, February 8, 2013 at 5:47pm*

**college algebra**

F(x) = 1144.7(x-1990) + 35,834 = $42303. 1144.7x for y - 2277953 + 35834 = 42303 1144.7x - 2242119 = 42303 1144.7x = 2284422 X = 1995.65 or 1996. The Median income was $42,303 for year 1996.
*Friday, February 8, 2013 at 4:56pm*

**college chem**

if the length of one side of a square is 12.0, what is the perimeter of the square?
*Friday, February 8, 2013 at 11:57am*

**College Algebra**

just solve 16t^2 = 128 t^2 = 8 t = √8 = 2√2
*Friday, February 8, 2013 at 11:16am*

**College Algebra**

w(2w+6) = 72 2w^2 + 6w - 72 = 0 w^2 + 3w - 36 = 0 w = 3/2 (√17 - 1) Odd answer. These usually involve integers. Typo?
*Friday, February 8, 2013 at 11:15am*

**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*

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