Friday

April 18, 2014

April 18, 2014

Post a New Question | Current Questions

**college physics**

You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 0.75 A of current through the light bulb and 7.5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 5.625 W. Assuming any resistors that you need, ...
*Tuesday, February 26, 2013 at 6:20pm*

**College physics**

According to test performed by the manufactures, an automobile with an initial speed of 75 km/h has a stopping distance of 25 m on a level road. assuming that no skidding occurs during breaking, what is the value of μ , between the wheels and the road required to achieve ...
*Tuesday, February 26, 2013 at 6:16pm*

**help college algebra**

given the following piecewise function f(x) = -x+1 for x<0 -1 for 0<x<3 -2x for x>3 find the domain find the range find the intercept d) is f continuous on it domain if not sate where f is dicontinous
*Tuesday, February 26, 2013 at 10:59am*

**college algebra**

f(x) = x^3+x f(1) = 2 f(2) = 10 slope is thus 8 The line is thus y-2 = 8(x-1)
*Tuesday, February 26, 2013 at 10:49am*

**college algebra**

given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)
*Tuesday, February 26, 2013 at 10:46am*

**statistics**

What is the probability that a student in a college of 650 students in both a math major and a computer science major ( assuming these events are independent) If there are 72 math majors and 105 computer science majors?
*Monday, February 25, 2013 at 10:37pm*

**college algebra**

Transformation of ty then transformations of the graphs y=x^2or y=|x| to sketch a graph of f by hand. f(x)=2|x-6|-4
*Monday, February 25, 2013 at 7:02pm*

**College Algebra help please**

I dont understand this. The question is use the remainder theorem to evaluate P(x) as given. 1. P(x)=3x^3+11x^2+2x-16 and it gives me P(1/3)
*Monday, February 25, 2013 at 6:08pm*

**college algebra**

gather all the x's together: x(1 - 1/3 - 1/2) - 5 = 0 1/6 x = 5 x = 30
*Monday, February 25, 2013 at 5:20pm*

**college algebra**

please help me solve this equation x-1/3x-1/2x-5=0
*Monday, February 25, 2013 at 5:18pm*

**math**

Sonja needs to borrow $2,251 to pay for her college classes. Sallie Mae is offering her a 4.5% simple interest loan with an interest charge of $405.18 over the life of the loan. How many years is Sallie Mae giving her to pay back the loan with interest?
*Monday, February 25, 2013 at 4:17pm*

**finance**

You have chosen biology as your college major because you would like to be a medical doctor. However, you find that the probability of being accepted to medical school is about 6 percent. If you are accepted to medical school, then your starting salary when you graduate will ...
*Monday, February 25, 2013 at 3:55pm*

**college**

the ball starts with a speed of 0 and accelerates to 44 m/s in a distance of 3.5m use: vf^2=v0^2+2ad vf=final speed = 44m/s v0=initial speed = 0 a=accel (to be determined) d= distance = 3.5 m 44^2=0+2ax3.5 a=44^2/7 = 276.6 m/s/s
*Monday, February 25, 2013 at 2:26pm*

**college algebra**

Not quite. You found (sort of) when the height is greatest (the vertex of the parabola). That was not the question. You have h=-9.8t^2+88.2t when is h=137.2? (Aside. You sure about that 9.8? h = vt - 1/2 at^2 and a = 9.8) 137.2 = -9.8t^2 + 88.2t t = 2,7 So, at those two times...
*Monday, February 25, 2013 at 12:30pm*

**Staistcs**

Problem 4 Refer again to the distribution table in Problem 3. : 3.0 points Each part is worth 1 point. a) In the United States, high school diplomas are awarded after 12 years of schooling. Which interval contains the adults who had completed 12 years of school and did not ...
*Monday, February 25, 2013 at 3:29am*

**college physics**

A 4m long copper wire has a diameter of 2mm and carries a current of 10A. Determine the ff: a. current density in the wire b. electric field c. potential difference between the ends of the wire d. resistance of the wire
*Monday, February 25, 2013 at 2:04am*

**college algebra**

If a rocket is propelled upward from ground level, its height in meters after t seconds is given by h=-9.8t^2+88.2t. During what interval of time will the rocket be higher than137.2m? Do I set it up like this? -9.8(1)^2+88.2(1)+137.2 = 215.6 Then h=b/2a=9.8/215.6=22m 137.2+22=...
*Monday, February 25, 2013 at 12:55am*

**college general chemistry**

calculate the lowest whole number ratio of Moles of Mg/moles of O average of Moles of Mg/Moles of O Trial 1 mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229 Trail 2 mass of empty crucible and lid=32.221 mass of Mg=0.340 mass of ...
*Monday, February 25, 2013 at 12:54am*

**college general chemistry**

calculate the lowest whole number ratio of Moles of Mg/moles of O mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229
*Monday, February 25, 2013 at 12:51am*

**Math Helppp**

The College Board, which are administered each year to many thousands of high school students, are scored so as to yield a mean of 550 and a standard deviation of 100. these scores are close to being normally distributed. what percentage of the scores can be expected to ...
*Sunday, February 24, 2013 at 9:28pm*

**Pacific Union College**

Biphenyl, C12H10, is a nonvolatile, nonionizing 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 17.5 g of biphenyl in 28.8 g of benzene?
*Sunday, February 24, 2013 at 11:26am*

**college chemistry**

NaCl is a solid and has no appreciable vapor pressure. I was under the impression that acetic acid CAN be steam distilled. I steam distilled an unknown I had when taking organic qual as a student and determined the Duclaux constant for acetic acid.And that was the unknown.
*Sunday, February 24, 2013 at 1:26am*

**college chemistry**

Why is it that sodium chloride or acetic acid can't bee steam distilled??
*Sunday, February 24, 2013 at 12:34am*

**College Algebra**

do you know the distance formula?
*Saturday, February 23, 2013 at 10:20pm*

**College Physics PLEASE HELP**

A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. The length and radius of the collagen are 2.5 and 0.091 cm. Young's Modulus is 3.1 x 10^6 N/m^2. a.) If the stretching obeys Hooke's Law, what is the spring ...
*Saturday, February 23, 2013 at 9:53pm*

**College Physics PLEASE HELP**

A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum acceleration of the mass, d...
*Saturday, February 23, 2013 at 9:51pm*

**College Algebra**

need help finding the distance using the distance formula please!!! (0,0) (x,y)
*Saturday, February 23, 2013 at 9:30pm*

**Math Helpppp**

The College Board, which are administered each year to many thousands of high school students, are scored so as to yield a mean of 550 and a standard deviation of 100. these scores are close to being normally distributed. what percentage of the scores can be expected to ...
*Saturday, February 23, 2013 at 8:33pm*

**college algebra**

now i understand both intersection and union but not with an infinity. how do i figure this out (-infinity,4)n(0,infinity)
*Saturday, February 23, 2013 at 7:28pm*

**College Math**

intersection is where the intervals overlap union is evetrything in either one (-1,1) extends from -1 to 1 [0,6] extends from 0 to 6 If you supermimpose the two shaded intervals, you will see that the combined shaded interval is (-1,6] The stuff in [0,1) is shaded twice, but ...
*Saturday, February 23, 2013 at 7:15pm*

**Science**

What did Oprah Winfrey do for 152 exceptional girls in South Africa? Select one: a. She gave each of them college scholarships. b. She helped them attend school in the United States. c. She invited them to attend her new school. d. She convinced them to leave South Africa. ...
*Saturday, February 23, 2013 at 7:14pm*

**College Math**

Could someone please explain the union to me. I dont understand. I get the intersection ones but not union. HElp me? Ecample: (-1,1)U[0,6]
*Saturday, February 23, 2013 at 7:13pm*

**College Algebra**

Thank You Steve. Now I understand the intersection. Could you please explain the union now. Ecample: (-1,1)U[0,6]
*Saturday, February 23, 2013 at 7:11pm*

**College Algebra**

Draw two number lines, one under the other (-1,5) extends from -1 to 5 underneath, [0,8) extends from 0 to 8 The intersection is just where the intervals overlap: [0,5)
*Saturday, February 23, 2013 at 6:57pm*

**College Algebra**

Hello, I have been trying to do my math homework for a few hours now and can not figure out how to find the indicated intersection or union in interval notation. Example: (-1,5)n[0,8) Please help me!!
*Saturday, February 23, 2013 at 6:14pm*

**college Art**

Descrbe how each artist viewed drawing as a part of the creative process.
*Saturday, February 23, 2013 at 2:28pm*

**College math **

Can someone please assist me The problem reads "use the rule of 78 to find the payoff amount for the loan paid in full before the date" Finance charge: $717 Total number of payments 41 Amount per payment $155 Remaining payments when paid in full 10 Please help. ...
*Friday, February 22, 2013 at 10:43pm*

**college algebra 1111**

2z^2=-41 z^2=-41/2 take the square root of each side z=+-i * sqrt(20.5) where i= sqrt(-1)
*Friday, February 22, 2013 at 12:44pm*

**college algebra 1111**

solve. 2z^2-7=-48
*Friday, February 22, 2013 at 12:41pm*

**Helpppp **

It's college math
*Friday, February 22, 2013 at 11:33am*

**science**

The mean weight of 500 male students at a certain college is 151 pounds (lb), and the standard deviation is 15 lb. Assuming that the weights are normally distributed, find the probability of students weight (a) between 121 and 155 lb (b) more than 185 lb. c) if 4% of the ...
*Friday, February 22, 2013 at 7:06am*

**college algebra**

if your sped is s, and keeping everything in hours: 1/(s+8.4) = 1/s - 14/3600 s = 42.465 mi/hr
*Thursday, February 21, 2013 at 11:40pm*

**college algebra**

driving along a crowded freeway you notice that it takes a time to go from one mile marker to the next. when you increase your speed by 8.4 mi/hr the time to go one mile decreased by 14 seconds. What was your original speed?
*Thursday, February 21, 2013 at 7:41pm*

**College Physics **

Find the magnitude of the magnetic flux through the floor of a house that measures 21m by 13m . Assume that the Earth's magnetic field at the location of the house has a horizontal component of 2.4×10−5 T pointing north, and a downward vertical component of 4.3...
*Thursday, February 21, 2013 at 7:26pm*

**college chemistry**

how to make a 1:8 dilution of chemical Y. You have 350 mililiters of chemical Y. how much diluent do you need?
*Thursday, February 21, 2013 at 6:40pm*

**Math**

A college student decides that school work limits him to a total of no more than ;36 hours per week at his two parttime&...
*Thursday, February 21, 2013 at 3:55pm*

**Math college **

Find the future value of $700 deposited at 3% for 7 years if the account pays simple interest and the account pays interest compounded annually
*Thursday, February 21, 2013 at 9:45am*

**Math**

A college freshman must take a science course, a humanities course, an elective course, and a mathematics course for the first term of the school year. If he or she may select any of the six science courses, any of the four humanities courses, any of the five elective courses...
*Thursday, February 21, 2013 at 4:06am*

**college trigonometry**

what is the function of tan 7pi
*Thursday, February 21, 2013 at 12:51am*

**college algebra**

Just che king to see if I did this right. f(x)=(x-4)^2+6 Graph f(x) I graphed 1quadrant 4 up 6 Identify vertex (4,6) Identify intervals f(x) is increasing and decreasing D [-00,6) I (6,00] Checking to see if I figured this right. Thanks
*Wednesday, February 20, 2013 at 7:05pm*

**college algebra**

The best way to do it is using calculus, but you are in college algebra. You are looking for length + width + width = 1000 feet because you don't need any for the river side. L + 2w = 1000 or L = (1000 - 2w) A = lw A = (1000-2w)(w) A = 1000w - 4w^2
*Wednesday, February 20, 2013 at 5:52pm*

**college algebra**

A farmer has 1000 feet of fence a rectangular plot of land. The plot lies along a river so that only has three sides need to be fenced. Find the largest area that can be fenced. What's the best way to solve this?
*Wednesday, February 20, 2013 at 5:05pm*

**College Finance**

1.A recent edition of The Wall Street Journal reported interest rates of 10.75 percent, 11.10 percent, 11.48 percent, and 11.75 percent for 3-, 4-, 5-, and 6-year Treasury security yields, respectively. According to the unbiased expectation theory of the term structure of ...
*Tuesday, February 19, 2013 at 11:51pm*

**reading**

(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...
*Tuesday, February 19, 2013 at 8:14pm*

**reading**

(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...
*Tuesday, February 19, 2013 at 8:14pm*

**randhills college life orientation**

See Related Questions below.
*Tuesday, February 19, 2013 at 6:13pm*

**randhills college life orientation**

3 environmental health hazard that cause ill health, crises, and or disasters within your community or any other community within south Africa and globally?
*Tuesday, February 19, 2013 at 6:11pm*

**college algebra**

done when you posted this earlier.
*Tuesday, February 19, 2013 at 9:44am*

**college algebra**

3034x^2+14,018x+6400 = 200000 3034x^2+14,018x - 193600 = 0 use the formula, you are just dealing with large numbers, I got x = 6.005 or a negative so adding 6 to 184 --->1990
*Tuesday, February 19, 2013 at 9:37am*

**college algebra**

X=1990
*Tuesday, February 19, 2013 at 6:03am*

**college algebra**

1984-1994 the equation the number of aids cases can be modeled by the equation C(x)=3034x^2+14,018x+6400 X represents years after 1984 estimate the year when 200,000 aids cases had been diagnosed.
*Tuesday, February 19, 2013 at 3:18am*

**college algebra**

1984-1994 the equation the number of aids cases can be modeled by the equation C(x)=3034x^2+14,018x+6400 X represents years after 1984 estimate the year when 200,000 aids cases had been diagnosed.
*Tuesday, February 19, 2013 at 2:45am*

**correction - college algebra**

the 4th line should have been 12x^2+9y=3y + 1 you probably wanted to solve for y, thus expressing it as a function: 6y = -12x^2 + 1 y = -2x^2 + 1/6
*Monday, February 18, 2013 at 10:13pm*

**college algebra**

If all you need to do is solve for x and y then this is what I would do: first solving for y 4x^2+3y=y+(1/3) multiply everything by 3 to get rid of (1/3) 12x^2+9y=3y then isolate y (12x^2)/(-6)=y then solving for x go back a few steps to get 12x^2=-6y (this is just rearranging...
*Monday, February 18, 2013 at 9:35pm*

**college algebra**

Solving for a variable 4x^2+3y=y+1/3 I'm stuck thanks
*Monday, February 18, 2013 at 8:37pm*

**College Algebra**

x^2+16x+64 + y^2-18y+81=25+64+81 (x+8)^2 + (y-9)^2=170 check that.
*Monday, February 18, 2013 at 8:15pm*

**College Algebra**

Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x^2+y^2+16x-18y+145=25
*Monday, February 18, 2013 at 7:57pm*

**college algebra**

If X^2-5 is the denom, then the domain would be all X such that the denom does not equal 0. So find when x^2-5=0 x=sqrt(5) (Both positive and negative) So the domain is all real numbers, such that X does not equal +- sqrt (5)
*Monday, February 18, 2013 at 7:37pm*

**college algebra**

Finding domain f(x)=1/x^2-5 Can't remember how to solve, your help is appreciated:-)
*Monday, February 18, 2013 at 7:34pm*

**College Algebra**

$400,440 + 845x =1200x $400,440 + 845x = 1199.99x x = # of TVs to get the answer to the second part compare your answer from the 1st to the 2nd.
*Monday, February 18, 2013 at 6:30pm*

**College Algebra**

A company is planning to produce and sell a new line of tvs. The fixed cost for the company is $400,440 and each tv cost $845 to produce. If they project the sales price of 1200, how many tvs will need to be sold to break even? If they decide to reduce the price to 1199.99, ...
*Monday, February 18, 2013 at 6:27pm*

**College Algebra**

avg rate of change is ∆y/∆x for the interval ∆y = f(10)-f(6) = 295-103 = 192 ∆x = 10-6 = 4 avg rate of change is thus 192/4 = 48
*Monday, February 18, 2013 at 4:58pm*

**College Algebra**

Find the average rate of change for function f(x)=3x^(2)-5 at the points x[1]=6 and x[2]=10
*Monday, February 18, 2013 at 4:49pm*

**College Algebra**

C(x) = 300000+500x avgC(x) = C(x)/x = 300000/x + 500 P(x) = R(x)-C(x) = -3x^2 + 2700x - 300000 = 3(-x^2 + 900x - 100000) max P(x) at -900/-2 = 450
*Monday, February 18, 2013 at 4:27pm*

**Maths-can someone explain something to me???**

And don't give up on the face time. We homeschooled our children for several years, and there are always support groups available. Someone near you will know about vectors. If you can't find anyone in your immediate circle of friends, don't be afraid to visit a ...
*Monday, February 18, 2013 at 4:21pm*

**College Algebra**

A company builds bicycles. Their fixed cost is 300,000 and it costs $500 to make each bicycle(labor,materials,etc.) A)What is the cost equation and what is the average cost per bicycle? B)If the revenue equation is -3x^2+3200x where x is the number of bicycles, how many ...
*Monday, February 18, 2013 at 1:59pm*

**College Algebra**

3=k/2^2 6=k/I^2 divide second equation by first. 2=4/I^2 I=sqrt 2
*Monday, February 18, 2013 at 11:50am*

**College Algebra**

Thank you!
*Monday, February 18, 2013 at 11:43am*

**College Algebra**

I know how to do this with calculus, but algebraically it starts the same way. L + 2W = 800 L = 800 - 2w A = LW A= (800-2w)w A = 800w - 2w^2 Take the derivative: 800 -4w 800 -4w = 0 to find max. 800 = 4w 200 =w l = 400
*Monday, February 18, 2013 at 11:35am*

**College Algebra**

Pinocchio has a problem with lying. Everytime he lies, his nose grows. The size of his nose grows inversely to the square of the lying index(less truth is a statement). If his nose grows to 3 inches with a lying index of 2, what will be the lying index if his nose grows to 6 ...
*Monday, February 18, 2013 at 11:00am*

**College Algebra**

You have 800 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river,find the length and width of the plot that will maximize the area. What is the largest area that can be enclosed?
*Monday, February 18, 2013 at 10:52am*

**college chemistry**

Number photons*energy each=.09(65) energy each=hf=h*c/lambda
*Sunday, February 17, 2013 at 9:37pm*

**college chemistry**

Assuming that 9.0\% of the energy output of a 65W lightbulb is visible light and that the average wavelength of the light is 550 {\rm nm}, how many photons are emitted by the lightbulb each second?
*Sunday, February 17, 2013 at 8:50pm*

**College Algebra**

I was told to start with x^2-8x+16=7/2 so where do i go from there? Thats after / by 2.
*Sunday, February 17, 2013 at 7:54pm*

**College Algebra**

2x^2 - 8x =-25 divide each term by 2 using completing the square, x^2 - 4x = -25/2 take 1/2 the coefficient of the x term, square it, then add it to each side x^2 - 4x +4 = -25/2 +4 (x-2)^2 = -17/2 or -34/4 , (I anticipated to take √ of both sides) x -2 = ± √...
*Sunday, February 17, 2013 at 7:12pm*

**College Algebra**

I was told to start with x^2-8x+16=7/2 so where do i go from there?
*Sunday, February 17, 2013 at 7:00pm*

**College Algebra**

Add the -25 to the other side... 2x^2-8x+25=0, Now use the quadratic formula to solve for x... Hope this helps
*Sunday, February 17, 2013 at 4:37pm*

**College Algebra**

This is my question 2x^2-8x=-25 I cant seem to figure out how to solve for x?
*Sunday, February 17, 2013 at 4:18pm*

**College Algebra**

Ok, I am supposing, Now what ?
*Sunday, February 17, 2013 at 12:08pm*

**College Algebra**

Suppose that the length of a rectangle is 21 inches and the width is 4 more than one third of the length?
*Sunday, February 17, 2013 at 11:46am*

**College Algebra**

In google type this question and you will see answer
*Sunday, February 17, 2013 at 2:06am*

**college**

You want to know your gravitational potential energy at A to B, hence why you use mgh equation. gpe= (o.215kg)(9.8m/s^2)(0.30m) that's what you would do to answer this question.
*Saturday, February 16, 2013 at 11:56pm*

**College Algebra**

A rectangle is bounded by the x-axis and the semicircle Y= SQ RT of 4-x^2. Write the area A of the rectangle as a function of x and determine the domain of the function.
*Saturday, February 16, 2013 at 11:38pm*

**college algebra**

X = Xv = h = 3. V(h,k)= V(3,1). P(1,9) Y = a(x-h)^2 + k Y = a(1-3)^2 + 1 = 9. 4a + 1 = 9 4a = 9-1 = 8 a = 2. Eq: Y = 2(x-3)^2 + 1 Axis: D(h,Y1), V(h,k), F(h,Y2). Axis: D(3,Y1), V(3,1), F(3,Y2). DV = k-Y1 = 1/4a = 1/8 1 - Y1 = 1/8 Y1 = 7/8. VF = Y2-k = 1/4a = 1/8 Y2-1 = 1/8 Y2...
*Saturday, February 16, 2013 at 8:34pm*

**COLLEGE MATH**

What is the PROCUREMENT cost of this 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 ...
*Saturday, February 16, 2013 at 8:30pm*

**Westwood college**

Sixth Fourth Bank has an issue of preferred stock with a $5.50 stated dividend that just sold for $97 per share. What is the bank’s cost of preferred stock?
*Saturday, February 16, 2013 at 5:44pm*

**college algebra**

(3,1) is the vertex of the parabola. (1,9) and (5,9) y = ax^2 + bx + c Substitue in the point (3,1) 1 = a(9) +b(3) +c Do the same for (1,9) and then again for (5,9) You will have 3 equations and 3 variables. Solve for a, b, c. There is also a formula to find the equation using...
*Saturday, February 16, 2013 at 2:03pm*

**college algebra**

Axis symmetry x=3 passing thru (3,1) and (1,9) Not sure how to solve
*Saturday, February 16, 2013 at 1:06pm*

**math**

the hostel of a college having 320 students has a stock of food for 80 days if 20 students leave the hostel after 20 days for how many more days will the food last?
*Saturday, February 16, 2013 at 4:29am*

**I need help**

Thing #1 Life is looooong!! the torture of childhood will be something you look back on and draw strength from, because you rose above the irrational. Thing #2 You are not alone! My step mom was verbally and physically abusive and my dad was working 12 - 16 hour days doing ...
*Saturday, February 16, 2013 at 3:43am*

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