# Homework Help: College

**college physics**

A 90 kg rock climber is stationary off the side of an overhanging cliff hanging onto her climbing rope. Another rope is tied to her foot and is attached at the other end to her 30 kg rock-climbing dog, also hanging out 2 m below her. Tied to the dog’s foot is yet another ...

*Saturday, November 3, 2012 by kevin*

**college physics**

A wet towel of mass 4 kg is hung in the center of a 6 m clothesline, so that the line makes an angle 10o with the horizontal. The tension in the line is closest to... 50N, 40N, 100N, 200N, or 10N

*Saturday, November 3, 2012 by kevin*

**college math**

A $8700 personal loan at 5.5% compounded monthly is to be repaid over a 4 year term by equal monthly payments. a) calculate the interest and principle component of the 18th payment b) how much interest will be paid in the third year of the loan?

*Saturday, November 3, 2012 by sasha*

**college algebra**

given function f(X)=X^3+3x findthe rate of change between the two stated values for x:1 to 2 find the equation of a secant line (1,f(1)and(2,f(2))

*Friday, November 2, 2012 by zachary*

**college algebra--please**

I am not understanding this question and I have read the chapter many times. Please help. given the function of f(x)=4x-8 a. find the the rate of change between the stated values for x:5 to 7 b. find the equation of a secant line containing the given points (5,f(5)), and (7,f(...

*Friday, November 2, 2012 by ladybug*

**college algebra**

graph the following function using transformations, be sure to graph all of the stages on one grph, state the domain and range y= x^2 +12x

*Friday, November 2, 2012 by zachary*

**college algebra**

given the function f(x)= x^3+3x find the rate of chnge between the two values x:1 to 2 find the equation of a secant line containing the given points (1,f(1) and (2,f(2))

*Friday, November 2, 2012 by zachary*

**SAT Essay**

Assignment: Can knowledge be a burden rather than a benefit? 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, experiences, or observations Essay: Knowledge can ...

*Friday, November 2, 2012 by Sanya*

**personal statement**

this is my personal statement. please check my grammar and what other stuff i can add or remove? thanks Ever since I was a little kid and till a year ago, I really didn’t know what I wanted to be in life. I imagined myself to be a teacher when I was 8 years old. As I grew ...

*Friday, November 2, 2012 by help me*

**College Algebra**

Simplfy the expresión using the laws of exponentes . 1. (-2x^2*y^-4)^3 2. (-4x^-6y^3)(2x^3y^-9)

*Friday, November 2, 2012 by Anhisha*

**college math**

A $8700 personal loan at 5.5% compounded monthly is to be repaid over a 4 year term by equal monthly payments. a) calculate the interest and principle component of the 18th payment b) how much interest will be paid in the third year of the loan?

*Friday, November 2, 2012 by sasha*

**college algebra**

graph the following function using transformations, be sure to graph all of the stages one graph, state the domain and the range y=x^2+12x

*Friday, November 2, 2012 by zachary*

**college algebra**

given the functionf(x)=x^3+3x find the rateof change between the two stated values for x:1 to 2 find the equation of a secant line containig the given points (1,f(1))and (2,f(2))

*Friday, November 2, 2012 by zachary*

**college algebra**

For the given equation list the intercepts. Y= -2X/(X^2+1) I think I Have this right I am not for sure? y=-2x/(x^2+1) (0)=(-2x/x^2+1) -2x/x^2+1=0 -2/x+1=0 -2/x+1+0 -2/x*x+1*x=0*x -2+x=0 x=2 y-intercept y= -2*0/(0)^2+1 y=o/0^2+1 y=0+1 y=0/0+1 x-intercept:(2,0) y-intercept:(0,0)

*Wednesday, October 31, 2012 by ladybug*

**college math**

a math student borrowed $9300.00 from his local bank at 7% compounded quarterly to pay for his studies. the loan is to be repaid by equal payments at the end of every quarter over a two year term. a)construct the amortization schedule for the loan. b)calculate the total interest.

*Wednesday, October 31, 2012 by sasha*

**statistik and probability**

n a college class of 250 graduating seniors 50 have jobswaiting. 10 are going to medical school, 20 are going to lawschool, and 80 are going to various other kinds of graduateschools. Select one graduate at random. a. What is the probability that the student is going ...

*Wednesday, October 31, 2012 by duka urgent*

**college math**

two bakeries produce three types of cookies, chocolate chip, sugar, and peanut butter. the cookies are produced in batches containing some of each type of cookie. the cooks will not break up a batch, so you must buy an entire batch of cookies if you want any cookies. mrs. ...

*Wednesday, October 31, 2012 by James*

**General Chemistry 1 college class**

The tomato is dropped. What is the velocity, , of the tomato when it hits the ground? Assume 82.7 of the work done in Part A is transferred to kinetic energy, , by the time the tomato hits the ground. Express your answer numerically in meters per second

*Tuesday, October 30, 2012 by Taylor*

**college physics**

A cruise ship of seniors is moving due west with an engine speed of 60km/hr when it encounters a current from the North at 20Km/hr. What is its relative velocity due to this current? (speed and angle) What course correction does it need to continue due west? (new angle and ...

*Tuesday, October 30, 2012 by Gee*

**college physics**

A cannonball shot at an angle of 60 Degrees had a range of 196m. What was its initial speed?

*Tuesday, October 30, 2012 by Gee*

**college physics**

A 3rd baseman is throwing a ball to 1st base which is 39.0m away. It leaves his hand at 38.0m/s at a height of 1.50m from the ground and makes an angle of 20 Degrees. How high will it be when it gets to 1st base.

*Tuesday, October 30, 2012 by Gee*

**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 by Gee*

**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 by Lizzy*

**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 by mezo*

**college algebra**

find the center and radius of the circle. Write in equation form. (4,8) and (13,8)

*Monday, October 29, 2012 by ladybug*

**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 by ladybug*

**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 by ladybug*

**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 into your ...

*Monday, October 29, 2012 by HJ*

**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 by Tiffany*

**college algebra**

list the intercepts and test for symmetry. y=-8x/x^2=49

*Sunday, October 28, 2012 by mary*

**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 by ladybug*

**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 by ladybug*

**college algebra**

if (a,-20) is a point on the graph of y=x^2+9x, what is a?

*Sunday, October 28, 2012 by ladybug*

**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 by ladybug*

**College math**

(2-3i)(3+5i)

*Saturday, October 27, 2012 by Jackie*

**College math**

-15-√-18/33

*Saturday, October 27, 2012 by Jackie*

**College math**

(-2+√-11)^2

*Saturday, October 27, 2012 by Jackie*

**College math**

√-81- √-144

*Saturday, October 27, 2012 by Jackie*

**College math**

3/4+i

*Saturday, October 27, 2012 by Jackie*

**College math**

-8i(2i-7)

*Saturday, October 27, 2012 by Jackie*

**College math**

(-2+6i)+(4-i)

*Saturday, October 27, 2012 by Jackie*

**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 by Michelle*

**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 by dannie0913*

**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 by ladybug*

**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 by vilma*

**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 by vilma*

**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 by zachary*

**college algebra**

for the given equation list the intercepts and test for symmetry y = x^3 -512

*Friday, October 26, 2012 by zachary*

**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 by Ruby*

**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 by ladybug*

**college algebra**

y=3x/x^2 + 81 for the given equation, list the intercepts and test for symmetry.

*Thursday, October 25, 2012 by ladybug*

**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 by Kristen*

**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 by Bill*

**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 by Chris*

**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 by Josh*

**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 by Alex*

**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 by Gee*

**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 by Sanya*

**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 by Anonymous*

**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 by NICOLETA*

**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 by Gee*

**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 by Gee*

**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 by Haley*

**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 by ursula*

**pltw**

How do you envision applying your sketching skills in college?

*Tuesday, October 23, 2012 by meee*

**I.E.D**

How do you envision applying your sketching skills in college?

*Tuesday, October 23, 2012 by meee*

**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 by Komal*

**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 by kerry*

**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 by kerry*

**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 by Gene*

**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 by Angel*

**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 by Angel*

**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 by Poe*

**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 by Rene*

**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 by Leslie*

**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 by Leslie*

**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 by amber*

**college statistic**

there are 10 candidates to fill 3 spots. how many teams can be formed

*Sunday, October 21, 2012 by Anonymous*

**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 by Shelby*

**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 by Will*

**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 by Will*

**College Algebra**

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 by Randi*

**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 M, ...

*Saturday, October 20, 2012 by Daniel*

**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 by sandy*

**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 by Anonymous*

**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 by Richard D*

**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 by Richard D*

**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 by Richard D*

**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 by Richard D*

**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 by Richard D*

**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 by Richard D*

**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 by Richard D*

**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 by Bryce*

**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 by Phillip*

**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 by Suzie*

**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 by Anonymous*

**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 by Spencer*

**College algebra**

What is the domain for X³+2X²-9X-18

*Monday, October 15, 2012 by MEghan*

**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 by Rachel*

**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 by sara*