Friday

April 18, 2014

April 18, 2014

Post a New Question | Current Questions

**College Statistics**

probilbility summary low birth weight and smoking moms how to calculate prevanece eatios
*Tuesday, April 9, 2013 at 5:52pm*

**College Chemistry**

You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured with a pH meter. The...
*Tuesday, April 9, 2013 at 4:31pm*

**college Mathematics**

yes Reiny it stands for intersection thank your help.
*Monday, April 8, 2013 at 8:03pm*

**stat probability**

At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?
*Monday, April 8, 2013 at 7:38pm*

**College math**

W = KXY^2/Z^3 = 3 K4*2^2/4^3 = 3 16K/64 = 3 K/4 = 3 K = 12. W = KXY^2/z^3 = 12*8*9^2/6^3 = 36.
*Monday, April 8, 2013 at 7:35pm*

**Life science, history, geography, and maths literacy**

Public health service. https://en.wikipedia.org/wiki/Public_health Travel Agent (aiming for your own business) CIA (as an analyst) Most of those above also require higher than average ability to communicate in writing, reading, analysis, and spoken communications. If ...
*Monday, April 8, 2013 at 4:14pm*

**college Mathematics**

yeah, u r very correct. n stands for intersection. ans=6
*Monday, April 8, 2013 at 8:18am*

**college Mathematics**

A' = {5,6) B' = {3,6,7,8} (A'UB') = {3,5,6,7,8} (AUB)' = {6} I don't understand the operator n is it supposed to stand for "intersection" ? if so, then (A'UB') ∩ (AUB)' = {6} if not, let me know what the n stands for
*Monday, April 8, 2013 at 8:10am*

**college Mathematics **

Can someone please help me with this I am not getting the same answers as the examples in the book. U={1,2,3,4,5,6,7,8} A={1,2,3,4,7,8} B={1,2,4,5} Determine (A'UB')n(AUB)'
*Monday, April 8, 2013 at 1:40am*

**Math-Statistics**

Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that 8 of more of the 10 ...
*Monday, April 8, 2013 at 12:36am*

**Math probability**

Assume that 60% of community college students are female. 1) if we pick 100 students at random justify why we can or cannot model this using a normal model. 2) find the probability that between 50 and 70 of the 100 students selected are female. 3) fidn Q1 and Q3 for the middle...
*Monday, April 8, 2013 at 12:02am*

**LBCC**

At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?
*Sunday, April 7, 2013 at 11:06pm*

**College Chemistry**

The Water loss by the sample, and the percent by weight of water in the unknown hydrates is 34.78%H2O. which of the ten possible hydrates are the most likely ones to be your unknown based on the percent by weight?
*Sunday, April 7, 2013 at 4:27pm*

**math - college algebra**

+∞ or -∞ extra credit. which one?
*Sunday, April 7, 2013 at 6:13am*

**math - college algebra**

If the rational function y = r(x) has the vertical asymptote x = 9, then as x →9+, either y → ____or _____
*Sunday, April 7, 2013 at 4:46am*

**Lincoln College Of New En**

26 Gasoline Mileage for Autos and Trucks – Of the top 10 cars and trucks based on gas mileage, 4 are Hondas, 3 are Toyotas, and 3 are Volkswagens. Choose one at random. Find the probability that it is Japanese, Japanses or German or not foreigh.
*Saturday, April 6, 2013 at 2:02pm*

**College Chemistry/Lab Math**

go back to basics and CHECK YOUR NUMBERS. There are only 31.1 grams in a troy ounce my friend...
*Saturday, April 6, 2013 at 12:54pm*

**College math**

I really need to know the answer to this extra credit problem. Please help! A quantity, W, is directly proportional to X and the square of Y and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and Z=6? Give answer to 3 ...
*Saturday, April 6, 2013 at 9:06am*

**College Chemistry**

if the volume of the vapor had been assumed to be 125ml instead of your measured volume,what would have been the percent error in your report? molar mass of the compound?explain
*Saturday, April 6, 2013 at 6:18am*

**college math**

if you know what direct and inverse variations are, then you know that w = kxy^2/z^3 plug in w,x,y,z to get k: 3=k(4)(4)/64 3 = k/16 k=48 so, w = 48xy^2/z^3 Now plug in the new x,y,z to get w, since we now know k.
*Saturday, April 6, 2013 at 5:23am*

**college math**

A quantity, W, is directly proportional to X and the square Y, and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and Z= 6? Give answer to 3 decimal places. Thanks in advance! I appreciate all the help! :)
*Friday, April 5, 2013 at 9:28pm*

**World Geography**

REVIEW 1.Canada currently ranks first in the world in which category? A. Total number of Internet users B. Percentage of college and university graduates<<<<<<<<; C. Literacy rate of adult population D. Average unemployment among citizens 2.The ...
*Friday, April 5, 2013 at 3:51pm*

**World Geography**

REVIEW 1.Which of the following statements about the natural resources of the United States is most accurate? A. The many agricultural resources of the United States have made up for its lack of other resources.<<<<<<<<< B. U.S. industry and ...
*Friday, April 5, 2013 at 3:49pm*

**college math**

W = k x√y/z^3 so W=3, x=4,y=2, z=4 3 = k(4√2/64 k = 192/(4√2) = 48/√2 so if x = 5,y=5,z=4 W = (48/√2)(5)(√5)/64 = 15√5/(3√2) or after rationalizing the denominator = 15√10/8 = appr 5.929
*Friday, April 5, 2013 at 3:12pm*

**college math**

A quantity, W, is directly proportional to x and the square of y and inversely proportional to the cube of z. W-3 when x=4,y=2 and z=4. What is the value of w, when x=5, y=5 and z=4. Give answer to three decimal places. Thanks so much!
*Friday, April 5, 2013 at 3:04pm*

**college math**

distance = speed*time, and the two distances are the same, so 8s = 13(s-1) s = 13/5 = 2.6 mph Note that we can mix minutes and mph, because the same factor would be applied to both sides if we converted everything to minutes or hours. As long as the units on both sides match, ...
*Friday, April 5, 2013 at 2:47pm*

**college math**

rate going to store --- x mph rate coming back ----- x-1 mph (8/60)x = (13/60)(x-1) times 60 8x = 13(x-1) 8x - 13x = -13 -5x = -13 x = 2.6 So he walked to the store at 2.6 mph check: (8/60)(2.6) = .34666... (13/60)(1.6) = .34666... , ---> same distance
*Friday, April 5, 2013 at 2:45pm*

**Quantitative Reasoning ( College Freshman)**

first, expand the factored form: y = -1/4 (x^2+2x-48) now regroup a bit to expose the perfect square: = -1/4 (x^2+2x+1 - 47) = -1/4 (x+1)^2 + 47/4
*Friday, April 5, 2013 at 2:42pm*

**college math**

It takes Mike 8 minutes to walk to the store from his house. The return trip takes 13 minutes because he walks 1mph slower due to the bags he is carrying. How fast did Mike walk on his way to the store? Carry out one decimal place. Thanks in advance!
*Friday, April 5, 2013 at 2:34pm*

**college math**

Let the volume of 52 proof to be added be x L so .26x + .41(1) = .33(1+x) or 26x + 41 = 33(1+x) 26x + 41 = 33 + 33x 8 = 7x x = 8/7 = 1.143 L check my arithmetic
*Friday, April 5, 2013 at 12:34pm*

**college math**

I posted this problem earlier, but I still can't figure it out. It is for extra credit. I was hoping if someone could please solve it. I would greatly appreciate it. A bourbon that is 51 proof is 25.5% alcohol by vol. while one that is 82 proof is 41% alcohol by vol. How ...
*Friday, April 5, 2013 at 11:39am*

**Quantitative Reasoning ( College Freshman)**

For the quadratic function : y=-0.25(x+8)(x-6) write the function in the vertex form y=a(x-h)^2+k by completing the square. Show all work.
*Friday, April 5, 2013 at 9:40am*

**Quantative Reasoning College Freshman**

Using the formula y=-16t^2+vt+h help me with this word problem : A firework rocket is fired straight up into the air with an initial velocity of v=192ft/sec From the top of an apartment building h=48ft off the ground. The firework will explode when it reaches the peak (maximum...
*Friday, April 5, 2013 at 9:35am*

**Government senior college ikoyi**

Basically the inradius of the equilateral triangle. The formula for that is inradius * semiperimeter (half the perimeter) = area We know that the formula for calculating the area of a equilateral triangle is s^2 sqrt 3 /4 so we get 100sqrt3 as the area of the equilateral ...
*Friday, April 5, 2013 at 7:23am*

**Government senior college ikoyi**

An equilateral triangle of side 20cm is inscribed in a circle.calculate the distances of a side of the triangle from the centre of the circle.
*Friday, April 5, 2013 at 7:18am*

**college physics**

a. V = Vo + gt t = -Vo/g = -22.5/-9.8 = 2.3 s. b. b. V^2 = Vo^2 + 2g*h h = (V^2-Vo^2)/2g h = (0-(22,5)^2)/-19.6 = 25.83 m. c. V^2 = Vo^2 + 2g*h V^2 = 0 + 19.6*25.83 = 506.27 V = 22.5 m/s. d. T = Tr + Tf = 2.3 + 2.3 = 4.6 s.
*Thursday, April 4, 2013 at 8:40pm*

**college algebra**

(3xy-2)2 x3
*Thursday, April 4, 2013 at 8:16pm*

**college algebra**

(3xy-2)2 x3
*Thursday, April 4, 2013 at 8:15pm*

**Lincoln College Of New En**

How man 4 letter code words can be made using the letters in the word pencil if repetitions are permitted?
*Thursday, April 4, 2013 at 7:28pm*

**college algebra**

Find a symbolic representation for f^-1(x) f(x)=8/x-5 Thanks
*Wednesday, April 3, 2013 at 10:51pm*

**college algebra**

Find a symbolic representation for f^-1(x) f(x)=8/x-5 Thanks
*Wednesday, April 3, 2013 at 10:40pm*

**math**

35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected. Find the probability that: a. Exactly 3 people will agree with that position (taken by the 35% of the population) b. ...
*Wednesday, April 3, 2013 at 10:03pm*

**college algebra**

Find the local maximum and minimum values of the function and the value of x at which each occurs. State each answer correct to two decimal places. (If an answer does not exist, enter DNE.) U(x)=x√(5-x)
*Wednesday, April 3, 2013 at 6:35pm*

**college algebra**

Find (f°g)(2) when f(x)=5x+9 and g(x)=1/x Thanks
*Wednesday, April 3, 2013 at 5:43pm*

**college algebra**

g◦f = √3f = √(3(x-5)) Since √ is defined only for non-negative values, 3(x-5) >= 0 x >= 5 so the domain is [5,∞)
*Wednesday, April 3, 2013 at 5:09pm*

**college algebra**

f(x)=x-5 and g(x)=√3x, what us the domain of g°f ? Thanks
*Wednesday, April 3, 2013 at 5:02pm*

**college algebra**

(fg)(x) = f(x)*g(x) = (x^2-3)(4x+1) = 4x^3 + x^2 - 12x - 3 (f-g)(-3) = f(-3)-g(-3) = 6-(-11) = 17
*Wednesday, April 3, 2013 at 4:43pm*

**college algebra**

f(x)=x^2-3 and g(x)=4x+1 to Evaluate (f-g)(-3) Then find (fg)(x) Thanks a million
*Wednesday, April 3, 2013 at 4:27pm*

**math**

35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected. Find the probability that: a. Exactly 3 people will agree with that position (taken by the 35% of the population) b. ...
*Wednesday, April 3, 2013 at 3:49pm*

**college algebra**

A. They've told you what P(x) is: P(x) = R(x)-C(x) = 47x-.3x^2 - (8x+16) = -.3x^2 + 39x - 16 Now , that's just a parabola, and you know that the parabola ax^2+bx+c has its vertex at x = -b/2a, so max profit P(x) occurs at x = -39/-.6 = 65
*Wednesday, April 3, 2013 at 3:32pm*

**college algebra**

At Allied electronics, production has begun on x-15 computer chip. The total revenue function is given by. R(x)=47x-0.3x^2 and the total cost function is given C(x)=8x+16, where x represents the number of boxes of computer chip produced. A. Find the profit function in P(x)=R(x...
*Wednesday, April 3, 2013 at 3:13pm*

**college algebra**

At Allied electronics, production has begun on x-15 computer chip. The total revenue function is given by. R(x)=47x-0.3x^2 and the total cost function is given C(x)=8x+16, where x represents the number of boxes of computer chip produced. A. Find the profit function in P(x)=R(x...
*Wednesday, April 3, 2013 at 2:41pm*

**randhills college life orientation**

Identify and describe 3 environmental halth that cause ill health
*Wednesday, April 3, 2013 at 9:25am*

**college physics**

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground? d). what total length...
*Tuesday, April 2, 2013 at 11:53pm*

**math**

random sample of 9600 students. Multistage design effect similar to an SRS (for those still in school) 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a college grad. b) ...
*Tuesday, April 2, 2013 at 9:27pm*

**college algebra**

for the domain, we know that √u must have u>=0, so we need x-2>=0, or x>=2. the range is [0,oo) domain and range are switched for the inverse
*Tuesday, April 2, 2013 at 1:38pm*

**college algebra**

f(x)=√x-2 Find the domain of the function is it x-2 the range of function is it (00,-2) the domain of the inverse is it x>-2 The range of the inverse is it (-2,00) Thanks
*Tuesday, April 2, 2013 at 1:01pm*

**college algebra**

2(10 * 25) + 2(10 * 50) + 2(25 * 50) = ______ square cm
*Tuesday, April 2, 2013 at 12:22pm*

**college algebra**

How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?
*Tuesday, April 2, 2013 at 12:20pm*

**college algebra**

3√z+1 = -3 3√z = -4 Now, √z is interpreted to be positive √4 = 2, not ±2 so, there is no solution to the equation 3√z = -4 since √z is positive However, we can go on to say that 3√z = -4 9z = 16 z = 16/9 But, this is really a ...
*Monday, April 1, 2013 at 5:34pm*

**college algebra**

I need help solving this equation. 3√z+1=-3 How do I do this problem? Thanks for your help.
*Monday, April 1, 2013 at 5:09pm*

**College Statistics**

yes
*Monday, April 1, 2013 at 1:24am*

**College Algebra**

45
*Sunday, March 31, 2013 at 8:42pm*

**college math**

What is 1000(1.03)^8 ?
*Sunday, March 31, 2013 at 7:27pm*

**college math**

An initial investment of $1000 is appreciated for 4 years in an account that earns 6% interest, 2) compounded semiannually. Find the amount of money in the account at the end of the period.
*Sunday, March 31, 2013 at 4:45pm*

**math**

random sample of 9600 students. 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a college grad. b) Sample does not include drop outs so estimate is valid only for students. ...
*Sunday, March 31, 2013 at 3:50pm*

**college physics**

h = Vo*t + 0.5g*t^2. = 3.6 0 * 4.9t^2 = 3.6 t^2 = 0.735 . Tf = 0.857 s. = Fall time. d = Xo * Tf = 13.4m/s * 0.857s. = 11 m.
*Saturday, March 30, 2013 at 7:01pm*

**college physics**

a. d = 0.5a*t^2. d = 0.5*3*30^2 = 1350 m. b. V = a*t = 3 * 30 = 90 m/s.
*Saturday, March 30, 2013 at 6:46pm*

**college physics**

V^2 = Vo^2 + 2a*d. a = (V^2-Vo^2)/2d a = (0-(23)^2)/420 = 1.26 m/s^2.
*Saturday, March 30, 2013 at 6:37pm*

**College Statistics**

A random variable X has a Gamma distribution with (alpha = a, beta = b). Show that P(X > 2ab) < (2/e)^a. hint: X > c is equivalent to e^Xt > e^ct
*Saturday, March 30, 2013 at 3:05pm*

**college American Government**

They should up the security by doing extreme check to make sure that their is no terrorism
*Saturday, March 30, 2013 at 8:07am*

**college physics**

24.633m/s
*Friday, March 29, 2013 at 6:36pm*

**statistics**

1. 35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected
*Friday, March 29, 2013 at 5:29pm*

**college physics**

a bus that is traveling at 30.0km/h speeds up at a constant rate of 3.5m/s2. what velocity does it reach 6.8s later?
*Friday, March 29, 2013 at 5:29pm*

**college physics**

a bicyclist rides off a flat roof at 13.4m/s, the roof is 3.6m above the ground, how far from the edge of the building does the bicyclist land? round the answer to the nearest meter.
*Friday, March 29, 2013 at 5:28pm*

**college physics**

an airplane starts from rest and accelerates at a constant 3.00m/s2 for 30.0s before leaving the ground. a). how far did it move? b). how fast was the airplane going when it took off?
*Friday, March 29, 2013 at 5:26pm*

**college physics**

a woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210m from the deer. if the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?
*Friday, March 29, 2013 at 5:25pm*

**college algebra**

X=(1/16)^(3/2) X=64
*Friday, March 29, 2013 at 4:32pm*

**valencia college**

can 4/5 be the probability of an event
*Friday, March 29, 2013 at 3:35pm*

**Statistics**

Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work. (a) For ...
*Thursday, March 28, 2013 at 4:56pm*

**Chemistry (College) URGENT**

molar mass= 90.01 g/mol and Ka= 1.38 x 10^-4
*Thursday, March 28, 2013 at 12:51pm*

**college algebra**

I apologize! I misread your equation. Multiply through by x^2 gives: 9x^2-8x-2=0. Use Quadratic Formula to get two solutions: (8+sqrt(136))/18 and (8-sqrt(136))/18. I checked, and both work!
*Thursday, March 28, 2013 at 9:36am*

**college algebra**

well, when is t^2 -35 t + 300 = 0 plain old quadratic t = [ 35 + / - sqrt (1225 - 1200) ]/2 = [ 35 +/- 5 ]/2 = 15 or 20 your profit is negative between 15 units and 20 units I suspect a typo in your problem. It does not make sense to have a profit of 300 for zero units sold.
*Wednesday, March 27, 2013 at 8:05pm*

**college algebra**

P=t^2-35t+300 the profit made when t units are sold t>0, is given by P=t^2-35t+300. Determine the number units to be sold in order for P<0 (a loss is taken). How do I solve this? Thanks for your help.
*Wednesday, March 27, 2013 at 7:49pm*

**college algebra**

Next step: x^2 = 3/16 Now take the square root of both sides (whatever operation you do to one side of an equation you must do to the other side as well): √x^2 = √(3/16) There are two possible solutions: x = - √3/4, √3/4 Substitute both values for x in ...
*Wednesday, March 27, 2013 at 7:33pm*

**college algebra**

Solve the equation. How do you solve a fraction? X^2/3=1/16 Thanks
*Wednesday, March 27, 2013 at 7:25pm*

**college physics**

Correction: V^2 = 102.9.
*Wednesday, March 27, 2013 at 7:13pm*

**college physics**

V^2 = Vo^2 + 2g*d V^2 = 0 + 19.8*(10.5-5.25) V^2 = 1102.9 V = 10.1 m/s.
*Wednesday, March 27, 2013 at 7:10pm*

**10 grade algebra**

please help with this problem Your dad is taking Biology as part of the veterinarian program at the local community college. This semester he will spend a total of 40 hours in the biology lab, and he will take notes in class 6 hours per week. Define a variable for the number ...
*Wednesday, March 27, 2013 at 7:06pm*

**college algebra**

Solve the equation. How do you solve a fraction? X^2/3=1/16 Thanks
*Wednesday, March 27, 2013 at 6:21pm*

**college algebra**

9(x+3)-3(x+3)=2 9x+27+3-9=2 6x-36 6x=48 x=8 Is this right?
*Wednesday, March 27, 2013 at 5:01pm*

**college algebra**

multiply everything by x^2-9, which gives you: -5(x+3)-3(x-3)=2 Have fun!
*Wednesday, March 27, 2013 at 4:23pm*

**college algebra**

Rational equation -5/x-3 - 3/x+3=2/x^2-9 how do I solve?
*Wednesday, March 27, 2013 at 4:14pm*

**Englisj**

1. Which of the following is NOT an example of persuasive writing? a position paper from an elected official a college admissions essay a movie review *a summary of a textbook reading assessment 2. Identify the following as a fact or an opinion: “Video games are too ...
*Wednesday, March 27, 2013 at 1:47pm*

**College Chemistry**

A temperature of 20o C is equivalent to approximately
*Wednesday, March 27, 2013 at 1:25pm*

**College algebra**

by inspection, f(x) = 7x^3+7x - x^2-1 = 7x(x^2+1) - (x^2+1) = (7x-1)(x^2+1) and so on
*Wednesday, March 27, 2013 at 12:26pm*

**College algebra**

Use the rationals theorem to find all the zeros of the polynomial function. Use the zeros to factor f over the real numbers, F(x)=7x^3-x^2+7x-1
*Wednesday, March 27, 2013 at 12:23pm*

**Unknow**

I'm so sorry, Lee, that you don't realize that college is a school. At least most colleges are schools for educating students. What is the name of your college? A fence needs to go around the entire garden. It has two lengths and two widths, right? One length lies ...
*Wednesday, March 27, 2013 at 12:21pm*

**Unknow**

Its not a school subject. its college
*Wednesday, March 27, 2013 at 11:54am*

**College Algebra**

Ok thank you
*Wednesday, March 27, 2013 at 10:33am*

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