Friday
April 18, 2014

# Homework Help: College

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

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
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

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

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 li​mits him to a total&​nbsp;of no more than ​;36  hours per week at hi​s 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
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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