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October 25, 2014

Homework Help: College

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college physics
A ball is thrown from a 20.0m high building and hits the ground 6.0m from the building. With what horizontal velocity was it thrown?
Tuesday, October 30, 2012 at 5:35pm

College Physics
At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given by theta(t)= 258t - 20.4t^2 - 1.47t^3 How many revolutions does the motor shaft turn through between the time when the current is reversed and the instant when ...
Tuesday, October 30, 2012 at 1:24pm

college physics
When the displacement of a mass on a spring is one half of the amplitude of its oscillation, what fraction of the total energy is kinetic energy?
Tuesday, October 30, 2012 at 1:22pm

college algebra
find the center and radius of the circle. Write in equation form. (4,8) and (13,8)
Monday, October 29, 2012 at 11:03pm

college algebra
find the line that is perpendicular to the line y=1/3x+4 and contains the point (-9,0)
Monday, October 29, 2012 at 10:40pm

college algebra
find the equation for the line with the given properties. Express in slope intercept. containing points P=(-5,1)and (-3,0)
Monday, October 29, 2012 at 10:37pm

Business Operations
I am wondering if someone could let me know whether my calculations for the critical ratio is correct. I've included the problem and my portion of the work I'd like some help on. Hi-Ho Yo-Yo, Inc. It was a little past 9:00 on a Monday morning when Jeff Baker walked ...
Monday, October 29, 2012 at 8:45pm

Chemistry (College) URGENT
1.6g of an unknown monoprotic acid (HA) required 5.79 mL of a 0.35 M NaOH solution to reach the equivalence point. Determine the molar mass of the acid and given that the pH at the half way point to the equivalent point is 3.86. Calculate the Ka of the unknown acid.
Monday, October 29, 2012 at 6:45pm

college algebra
list the intercepts and test for symmetry. y=-8x/x^2=49
Sunday, October 28, 2012 at 10:08pm

college algebra
find the equation for the line with the given properties. Express in slope intercept form. Containing points P=(-3,-4) anda Q=(-1,-1)
Sunday, October 28, 2012 at 9:48pm

college algebra
find the equation of the line in slope inntercept form. (-1,1) and (-2,1) I know that I have to use m=y^2-y^1/x^2-x^1 which is slope form then I get: m=1-(1)/-2-10 which I substitue m= ? is where I get lost but then I know the next part is: y=mx+b then I am lost from here on ...
Sunday, October 28, 2012 at 9:38pm

college algebra
if (a,-20) is a point on the graph of y=x^2+9x, what is a?
Sunday, October 28, 2012 at 8:49pm

college algebra
the midpoint of the line segment from p1 to p2 is (-1,3). if p1=(-6,7) what is p2?
Sunday, October 28, 2012 at 7:33pm

College math
(2-3i)(3+5i)
Saturday, October 27, 2012 at 8:38pm

College math
-15-√-18/33
Saturday, October 27, 2012 at 8:36pm

College math
(-2+√-11)^2
Saturday, October 27, 2012 at 8:35pm

College math
√-81- √-144
Saturday, October 27, 2012 at 8:34pm

College math
3/4+i
Saturday, October 27, 2012 at 8:32pm

College math
-8i(2i-7)
Saturday, October 27, 2012 at 8:31pm

College math
(-2+6i)+(4-i)
Saturday, October 27, 2012 at 8:30pm

Art 101 college
Explain how Florence reflects the ideals of the dominant city-state and how some of the geographical, economical, social, and artistic forces shape this ideal. Use one example from Gardner’s Art through the Ages and one example from the Internet.
Saturday, October 27, 2012 at 8:15pm

college math
3.15 A bank branch located in a commercial district of a city has developed an improved process for A bank branch located in a commercial district of a city has developed an improved process for serving customers during the noon-to-1:00 p.m. lunch period. The waiting time, in ...
Saturday, October 27, 2012 at 6:11pm

college algebra--Please help Reiny please
You helped me with this question and this is what I got but my Professor says that each x and y intercept needs to have a coordinate. Where did I go wrong?? Can you help me? x^2+y^2+4x+2y-20=0 x^2+4x+4+y^2-2y+1=20+4+1 (x+2)^2+(y+1)^2=25--this is where you helped me. Then I ...
Friday, October 26, 2012 at 9:29pm

math
A class of college freshmen is composed of 110 students. Among these students, 75 are taking English, 52 are taking history, 50 are taking math, 33 are taking English and history, 30 are taking English and Math, 22 are taking History and Math, and 13 are taking all three ...
Friday, October 26, 2012 at 6:55pm

math
A class of college freshmen is composed of 110 students. Among these students, 75 are taking English, 52 are taking history, 50 are taking math, 33 are taking English and history, 30 are taking English and Math, 22 are taking History and Math, and 13 are taking all three ...
Friday, October 26, 2012 at 6:17pm

college algebra
write the equation of the circle in standard form find the center radius, intercept and graph circle x^2 +y^2+8x+2y+8=0
Friday, October 26, 2012 at 5:36pm

college algebra
for the given equation list the intercepts and test for symmetry y = x^3 -512
Friday, October 26, 2012 at 5:31pm

college calc
Approximate the square root of 64.3, y=x^(1/2). Starting point is the square root of 64.
Friday, October 26, 2012 at 11:28am

college algebra
Write the equation of the circle in standard form. Find the center, radius and intercepts. x^2 + y^2 + 4x + 2y - 20 = 0
Thursday, October 25, 2012 at 10:31pm

college algebra
y=3x/x^2 + 81 for the given equation, list the intercepts and test for symmetry.
Thursday, October 25, 2012 at 10:27pm

college chemistry
If KHP sample #1 requires 27.30 mL of NaOH solution to reach an endpoint, what volume should be required for samples #2 and #3?
Thursday, October 25, 2012 at 3:26pm

College Chemistry
What volume of the solution in 5a would be necessary to react completely with 23.00mL of 0.549M NH3 according to the equation: NiSO4+6NH3 -> [Ni(NH3)6]SO4 The molarity of ta is 1.667 x 10^-4M
Thursday, October 25, 2012 at 1:40am

College Chemistry
The specific Heat of gold is 0.128 J/g degrees Celsius. How much heat would be needed to warm 250.0g of gold from 25.0 degrees Celsius to 100.0 degrees Celsius
Thursday, October 25, 2012 at 12:52am

College Chemistry
Calculate the number of Joules released when 75.0 g of water are cooled from 100.0 degrees Celsius to 27.5 degrees Celsius
Thursday, October 25, 2012 at 12:47am

College Chemistry
Calculate the heat in joules needed to warm 225g of water from 88.0 degrees Celsius to its boiling point 100.0 degrees Celsius
Wednesday, October 24, 2012 at 11:35pm

physics college
A dog sled is pulled at an angle of 30 degrees with the horizon using a tension of 450N. If the sled has a mass of 50kg, then find the recoil, forward force and acceleration (if any).
Wednesday, October 24, 2012 at 10:13pm

SAT Essay
Assignment: Is there such a thing as success without sacrifice? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experience, or observations. Essay: It is very ...
Wednesday, October 24, 2012 at 9:36pm

prob and stats
11. Assume that the population of heights of male college students is approximately normally distributed with mean m of 72.15 inches and standard deviation s of 6.39 inches. A random sample of 96 heights is obtained. Show all work. (A) Find (B) Find the mean and standard error...
Wednesday, October 24, 2012 at 3:29pm

COLLEGE MATH
ANDY PUT DOWN 1/14 INCH THICK SUBFLOORING.nEXT HE NAILED DOWN 3/16 INCH THICK UNDERLAY.ON TOP OF THAT , HE NAILED DOWN 4/14 INCH THICK HARDWOOD FLOORING.hAW THICK WAS THE RESULT?
Wednesday, October 24, 2012 at 1:56pm

physics college
A rocket booster fires in space with a force of 500N and moves the 10kg satellite from rest to motion in 2.1 seconds. Find the acceleration? What is the final speed of the satellite?
Tuesday, October 23, 2012 at 11:30pm

physics college
A lamp has a mass of 10kg and is supported by two wires that make an angle of 35 degrees between them. Find the tension in each wire?
Tuesday, October 23, 2012 at 11:28pm

college chemistry
A sample of helium occupies 1521 mL at 719 mmHg. Assume that the temperature is held constant and determine a) the volume of the helium at mmHg. b)the pressure, in mmHg, if the volume is changed to 315mL
Tuesday, October 23, 2012 at 11:10pm

college chemistry
How many gram of Zn would be necessary to produce 534 grams of Fe by the sequence of reactions shown below? Step 1 Zn + HCl ==> ZnCl2 + H2 Step 2 Fe2O3 + H2 ==> Fe + H2O
Tuesday, October 23, 2012 at 6:19pm

pltw
How do you envision applying your sketching skills in college?
Tuesday, October 23, 2012 at 6:03pm

I.E.D
How do you envision applying your sketching skills in college?
Tuesday, October 23, 2012 at 5:53pm

stats
A researcher hypothesizes that a new herbal supplement improves memory. A sample of n = 25 college students is obtained and each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory test, and the average...
Tuesday, October 23, 2012 at 4:46pm

NEED HELP ASAP, college math
Find the future value! Periodic payment: $650.00 Payment interval: every month Term: 19 years, 2 months Interest rate: 4.75% Compound frequency: monthly
Monday, October 22, 2012 at 11:17pm

college math
Calculate the future value of an ordinary annuity consisting of annual payments of $1,000 for 4 years if the payments earn 10.70% compounded annually for the first 2 years and 9% compounded annually for the last 2 years. For full marks your answer(s) should be rounded to the ...
Monday, October 22, 2012 at 11:04pm

college percentages
One number exceeds another by 24. The sum of the numbers are 58. What are the numbers? please help!
Monday, October 22, 2012 at 10:46pm

college math please help
What do these mean? They are supposed to represent things but I don't understand them. C=2╥r for r, S=P+Prt for t, and A=2lw+2lh+2wh for h
Monday, October 22, 2012 at 10:40pm

college math word problem
A new car worth 45K is depreciating in value by 5K per year. How can I write a formula that models the cars' value,y, in dollars, after x years?Then using the formula determine after how many years the cars' value will be 9K.
Monday, October 22, 2012 at 10:39pm

College math
What do these mean? They are supposed to represent things but I don't understand them. C=2╥r for r, S=P+Prt for t, and A=2lw+2lh+2wh for h
Monday, October 22, 2012 at 10:24pm

College Algebra
The concentration C of a certain drug in a patient's bloodstream t minutes after injection is given by C(t)=50t/t^2+25. Determine the time at which the concentration is highest. Round your answer to the nearest tenth of a minute.
Monday, October 22, 2012 at 3:18pm

College chemistry
When your body metabolizes amino acids, one of the final end products is urea, a water so liable compound that is removed from the body as urine. Why is urea soluble in water, when hexamide, a related compound is not?
Monday, October 22, 2012 at 2:01am

College chemistry
When your body metabolizes amino acids, one of the final end products is urea, a water so liable compound that is removed from the body as urine. Why is urea soluble in water, when hexamide, a related compound is not?
Monday, October 22, 2012 at 2:01am

college physics
A student moves a box of books by attaching a rope to the box and pulling with a force of 80.0 N at angle of 45o. The box of books has a mass of 25.0 kg and the coefficient of kinetic friction between the bottom of the box and the sidewalk is 0.43. Find the acceleration of the...
Sunday, October 21, 2012 at 8:26pm

college statistic
there are 10 candidates to fill 3 spots. how many teams can be formed
Sunday, October 21, 2012 at 4:11pm

College Chemistry
Two moles of Mg and five moles of O2 are placed in a reaction vessel, and then the Mg is ignited to produce Mg (F.W.= 40.31 g/mole). What is the actual mole ratio, the calculated mole ratio, how many moles of MgO are formed, and what is the weight of MgO formed?
Sunday, October 21, 2012 at 3:30pm

College Chemistry
Using the molar volume (STP) or the ideal gas law equation, determine the molar mass,g/mole, of each of the following. A: 11.2g of a gas that has a volume of 1.50Lat STP? B: .0710g of a gas that has a volume 825ml at 1 atm
Sunday, October 21, 2012 at 2:41pm

College Chemistry
A 14.0 g sample of Krypton has a temperature of 25C at 625mm Hg. What is the volume, in Milliliters, of the krypton?
Sunday, October 21, 2012 at 2:35pm

College Alegbra
An arrow is launched upward with a velocity of 54 feet per second from the top of a 75 foot building. What is the maximum height attained by the arrow in feet?
Saturday, October 20, 2012 at 9:19pm

College Physics
A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its center. Attached to each end of the rod is a small mass m. Determine the angular momentum of the system about the axis. Write you're answer in terms of...
Saturday, October 20, 2012 at 8:55pm

college alegebra
√3x-2+√2x+5+1=0 Could this square root problem be solved by using a graphing TI-84 Plus calculator? If so, will you please tell me how to do it. Thanks
Saturday, October 20, 2012 at 9:20am

College Algebra
The half-life of a radioactive material is about 34.6 years. How much of a 1-gram sample of the material is left after 30 years?
Saturday, October 20, 2012 at 12:21am

College Math
Find the area of a rectangle if three of its corners are (-3.7, -3.1), (1.2, -3.1), and (1.2, 5.3). Hint: find the 4th corner first.
Friday, October 19, 2012 at 12:08pm

College Math
Using EZgraph, graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. 3. 4.9x – 7.2y = 2.3 4. 2x = -8 5. 3.7x + 4.2y = 5.03
Friday, October 19, 2012 at 12:04pm

College Math
Mary buys $32,000 worth of gold, and sells it a year later for $41,000. If she is required to pay 23% capital gains tax on her profit, how much tax will she pay?
Friday, October 19, 2012 at 12:02pm

College Math
Find an equation in slope-intercept form passing through the points (-4.7, 16.3) and (-2.9, 16.3). Hint: first find the slope!
Friday, October 19, 2012 at 12:01pm

College Math
A temperature of 38 degrees Fahrenheit (F) is equivalent to 276.483 degrees Kelvin (K), while a temperature of 75 degrees F is equivalent to 297.039 degrees K. (a) Using the algebra methods from this class, find the equation converting Kelvin temperature to Fahrenheit.(Hint: ...
Friday, October 19, 2012 at 11:57am

College Math
A clarinet factory wants to maximize profits. They can produce 250 clarinets per week at a cost of $300 per clarinet, and sell them for $1000 per clarinet. And, they can produce 350 clarinets per week at a cost of $275 per clarinet, and sell them for $900 each. How much profit...
Friday, October 19, 2012 at 11:41am

College Math
Find the area of a rectangle if three of its corners are (-3.7, -3.1), (1.2, -3.1), and (1.2, 5.3). Hint: find the 4th corner first.
Friday, October 19, 2012 at 11:40am

Question regarding career options
I have a few questions about my possible future! I plan on majoring in sports medicine and nutrition. Id also like to obtain my personal training degree while in college. I plan on one day also having my own gym franchise or business. As you can see, I LOVE fitness:) Would ...
Thursday, October 18, 2012 at 6:07pm

College Calc
Problem: y=sqrtx ^1/x. Find DY/DX. ln(f(x))=lnx^1/2x or lnx to the 1/2x 1/2x lnx product rule (1/4x^2)(lnx)+(1/x)(1/2x) is the product rule correct? What do i do after this product rule?
Thursday, October 18, 2012 at 12:28pm

College Physics
13. What is the magnitude of the gravitational force that acts on two particles? Assume that particle 1 (m1) is 12 kg and particle 2 (m2) is 25 kg, they are both separated by a distance of 1.2m
Wednesday, October 17, 2012 at 5:50pm

College Discrete
An urn contains n > 0 white balls and m > 0 black balls. Consider the experiment where two balls are drawn without replacement. What is the probability that the balls are of the same color? What is the probability of this event, if the balls are drawn with replacement? ...
Tuesday, October 16, 2012 at 7:28pm

College Algebra
Perform the indicated operation and simplify if possible. Assume any factors you cancel are not zero. s/(s^2-5s-24)-4/(s+3)
Tuesday, October 16, 2012 at 1:54am

College algebra
What is the domain for X³+2X²-9X-18
Monday, October 15, 2012 at 9:08pm

College Algebra
A piling supporting a bridge sits so that 1/4 of the piling is in the sand, 150 feet is in the water, and 3/5 of the piling is in the air. What is the total height of the piling?
Monday, October 15, 2012 at 9:01pm

college orgo
calculate how to make 10 mL of 15:85 ethyl acetate:hexane solution from 2 mL of 5:95 ethyl acetate:hexane, using pure hexane and pure ethyl acetate.
Monday, October 15, 2012 at 6:53pm

College Algebra
The campus of a college has plans to construct a rectangular parking lot on land bordered on one side by a highway. There are 720 feet of fencing available to fence the other three sides. Let x represent the length of each of the two parallel sides of fencing. a) Express the ...
Monday, October 15, 2012 at 6:10pm

College Chemistry
We will calculate the amount of acid to use in each titration. Assume that you are using 0.0512 M NaOH(aq). A good volume of NaOH(aq) to use per titration is 15mL. From this molarity and volume, the moles of NaOH can be calculated. Since the unknown acid is monoprotic, this ...
Monday, October 15, 2012 at 5:34pm

college chemistry
Please be specific! Briefly explain whether each if the following procedural errors would result in a high, low, or an unchanged calculated mass of Ca2+ in the analyzed tablet. a)a student had difficulty decanting the supernatant solution from the test tubes in step 9, causing...
Monday, October 15, 2012 at 4:37pm

College Chem
The density of the Earth is about 3.5g/cubic centimeters. If the Earth has a radius of 1.126 by 10 (to the seventh power) meters, what is its mass? (hint: volume= 4(pie)r(to the third power)/3; 1 meter=100 centimeters
Sunday, October 14, 2012 at 10:32pm

psychology
Imagine that Rasmussen College has asked the psychology department to research the study habits of its students
Sunday, October 14, 2012 at 10:08pm

College Chemistry
calculate the theortetical percentage of water for the following hydrates. Calcium nitrate tetrahydrate Ca(No3)2 X 4H2O
Sunday, October 14, 2012 at 9:00pm

College Chemistry
Assuming that Ka is 1.85 *10-5 for acetic acid, calculate the pH at one-half the equivalence point and at the equivalence point for titration of 50mL of 0.100M acetic acid with 0.100M NaOH.
Sunday, October 14, 2012 at 9:29am

college algebra
a man left 1\2 of his estate to his wife, 1\6 to his daughter, and the remainder an amount of $15,000, to his son. How large was the entire estate?
Sunday, October 14, 2012 at 6:52am

college math
I'm trying to find why the linear function f(-x)=x√x^2+2 is negative when it should be neither. why are √'s not negatives?!?!?! Is it because √x can't cross over the y axis because √x can't be negative? Then why is it that the x on the ...
Sunday, October 14, 2012 at 12:50am

City College
Galileo is riding on top of a horse that is gallop- ing at 11 ft/s due east. A minute into his ride, Galileo pulls a key out of his pocket, and holds it over the side of the horse. When he lets go, the key falls 3.0 ft vertically to the ground. a). How far has the horse ...
Saturday, October 13, 2012 at 8:31pm

Oakton College
How is dividing a polynomial by a binomial similar to or different from the long division you learned in elementary school? Can understanding how to do one kind of division help you with understanding the other kind? What are some examples from real life in which you might use...
Saturday, October 13, 2012 at 1:09pm

Statistics (Math)
A government report looked at the amount borrowed for college by students who graduated in 2000 and had taken out student loans. The mean amount was = $ 17 , 776 and the standard deviation was s = $12,034. The quartiles were Q 1 = $9900, M = $15,532, and Q 3 = $22,500. The ...
Saturday, October 13, 2012 at 3:27am

English1C
How to write a fallacy essay . Write purpose of the article including name, title, author, and say if you think the article is strong or not . We live in a polarizing society, so perhaps it’s inevitable that our experience of inequality should be polarized, too. Josh ...
Friday, October 12, 2012 at 7:00am

college geometry
if triangle mnp approximate triangle srt with proportionality factor k, show that if ma and sb are altitudes of the given triangles, then ma = ksb in
Thursday, October 11, 2012 at 10:47pm

Math
Hudson is already 40 miles away from home on his drive back to college. He is driving 65 mi/hr. Write an equation that models the total distance d travelled after hours h. What is the graph of the equation. When Phil started his new job, he owed the company $65 for his ...
Thursday, October 11, 2012 at 9:26pm

College Math
Simplify the algebraic expression 3z3 – 5x2 + 2 – 4y2 + 6x2 – 4z3 – 7y + 12 – 2x and evaluate it for x = -2, y = -3, z = -4. Identify the variables, constants, and coefficients in the simplified expression.
Thursday, October 11, 2012 at 2:25pm

College Math
Simplify the algebraic expression 3xz + 4xy – 2yz + xy + 5yz – 9xz and evaluate it for x = 3, y = -2, z = -5. Identify the variables, constants, and coefficients in the simplified expression.
Thursday, October 11, 2012 at 2:25pm

College Math
In a certain triangle the measure of one angle is triple the measure of a second angle but is 110 degrees less than the measure of the third angle. [The sum of the measures of three interior angles of a triangle is always 180 degrees.] What is the measure of each angle?
Thursday, October 11, 2012 at 2:21pm

College physics - Center of mass
College Physics- Center of Mass? The objects in the figure below are constructed of uniform wire bent into the shapes shown (Figure 1) . Each peice has a length of 0.15 . There are two objects that we need to figure out the x- and y-coordinates of the center of mass of the ...
Wednesday, October 10, 2012 at 11:39pm

College Physics
College Physics- Inertia? Find the moment of inertia about each of the following axes for a rod that is 0.300 in diameter and 1.60 long, with a mass of 5.00×10−2 . How do you find this ? I know how to find the perpendicular and end . but this? About an axis along ...
Wednesday, October 10, 2012 at 11:39pm

College Physics
A 0.35 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 20° with the horizontal. Determine the speed of the stone. I've tried tan 20= gr/v^2 = (9.8)(.8)/v^2 = 4.7 m/s and that's not the correct answer (online ...
Wednesday, October 10, 2012 at 9:40pm

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