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April 18, 2014

Homework Help: College

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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===&gt;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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