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July 30, 2014

July 30, 2014

Post a New Question | Current Questions

**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**

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**

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 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**

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**

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**

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*

**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**

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**

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**

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**

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**

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**

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**

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**

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**

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**

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 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**

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*

**college algebra**

Axis of symmerty x=3 passing thru (3,1) and (1,9) What is the best way to solve?
*Friday, February 15, 2013 at 7:32pm*

**College Math**

What is the PROCUREMENT cost of the below 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 ...
*Friday, February 15, 2013 at 3:59pm*

**Copperbelt international college **

A chord PQ of length 5.6cm divides a circle of radius 3.5cm into two segments.calculate the difference in areas between major and minor segment in the circle of chord PQ.
*Friday, February 15, 2013 at 1:07am*

**college physics 1**

The coefficient of static friction between a block of wood of mass 29.2-kg and a rough table is 0.51. The table is slowly tilted until the block of wood starts to slide down the surface. At what angle of the table with respect to the horizontal does the wood start to slide? ...
*Thursday, February 14, 2013 at 3:21pm*

**college algebra**

Solve equation |x+3|=|2-x| Not sure which way to go to solve. Thanks
*Wednesday, February 13, 2013 at 7:28pm*

**college chemistry 101**

why does an opened bottle of carbonated water keep its frizz longer if kept in a refrigerator than if left at room temperature?
*Wednesday, February 13, 2013 at 4:03pm*

**college algebra**

Solve absolute value inequality, use interval notations. |4+2x|-3> I know the answer is x>2 or x<-6 But I'm unsure how to solve it. Thanks
*Wednesday, February 13, 2013 at 2:57pm*

**College**

A bod of 10kg is traveling in straight line at 10m/s (a)what is de momentum?(b)what is de average force required to increase its velocity 4rom zero to 20m/s in 4seconds?
*Wednesday, February 13, 2013 at 9:28am*

**maths **

the heights of female students at a particular college are normally distributed with the mean 169 cm and standard deviation 9 cm. 1) Given that 80% of these female students have a height less than h cm ,find the value of h. 2) Given that 60% of these female students have a ...
*Wednesday, February 13, 2013 at 7:11am*

**college trigonometry**

verify identity: (tanx-cotx)/sinxcosx=sec^2x csc^2x
*Tuesday, February 12, 2013 at 11:28pm*

**college chemistry**

If i have a highly polar mobile phase, what will happen to the non-polar or less polar compounds during chromatography? will they move less up the TLC plate or actually even more because the mobile phase itself is so polar.
*Tuesday, February 12, 2013 at 6:45pm*

**college Mathematics **

I have been trying to figure this out for day's please help if you can. A survey of 59 customers was taken at a book store regarding the type of novels purchased. The survey found 34 customers purchased mysteries, 27 purchased science fiction, 20 purchased romance novels, ...
*Tuesday, February 12, 2013 at 10:21am*

**College Physics 2**

A parallel-plate air capacitor is made from two plates 0.250 m square, spaced 0.70 cm apart. It is connected to a 140 V battery. a) What is the capacitance? C = 7.90×10−11 F b) What is the charge on each plate? Enter your answer as an absolute value of charge. Q = ...
*Monday, February 11, 2013 at 9:09pm*

**college chemistry**

How will the Rf values be affected if i use a highly polar mobile phase instead of one that has intermediate polarity?
*Monday, February 11, 2013 at 4:51pm*

**college algebar**

5< x-2/6 <6
*Monday, February 11, 2013 at 1:26pm*

**Business Calculus**

Pam and Tim decide to start saving money for their daughter's college education. They open a college savings plan (529) with a 500 dollars initial investment and next month start to make monthly deposits of 120 dollars. If the account pays 8% compounded monthly, how much ...
*Monday, February 11, 2013 at 1:56am*

**college algebra**

Need to solve what are the steps to do so? 1.5<9.1-0.5x<6.8. <they are underlined. Thanks
*Sunday, February 10, 2013 at 12:47pm*

**college algebra**

I need to figure out how to solve this equation your help will be much appreciate:-) √5(x-1.2)-√3x<5(x+1.1)
*Sunday, February 10, 2013 at 12:45pm*

**STAT**

Functional foods are those containing nutritional supplements in addition to natural nutrients. Examples include orange juice with calcium and eggs with omega-3. Kolodinsky, et al. (2008) examined attitudes toward functional foods for college students. For American students, ...
*Sunday, February 10, 2013 at 1:46am*

**STAT**

Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer, and Catanese (2003) examined the importance of food as a source of pleasure versus concerns about food associated with ...
*Sunday, February 10, 2013 at 1:43am*

**college algebra**

Please show me the steps to solving this equation:-) √5(x-1.2)-√3x<5(x-1) Your help is greatly appreciated.
*Sunday, February 10, 2013 at 1:03am*

**College Algebra**

Hello - I am stuck on this problem and I'm in serious need of some help. I don't understand this question at all. The problem is: Find the equilibrium quantity and equilibrium demand function for the given: Supply: P=45q Demand: P=q^2+10,000
*Saturday, February 9, 2013 at 7:40pm*

**college chem**

Biphenyl, C12H10, is a nonvolatile, non ionizing 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 14.3 g of biphenyl in 25.8 g of benzene?
*Saturday, February 9, 2013 at 5:42pm*

**college algebra**

Write an equation of the line parallel to the line given by 3x-2y=8 and having the same y-intercept as the line given by 2y+3x=-4 (show work) I am stuck with this problem. Can you please show me how to do these types of equations? Thank you
*Saturday, February 9, 2013 at 1:53pm*

**College Algebra**

If the length of molding to create the frame is 96 inches. If the frame surrounding the picture is 3.5 inches wude and the length is 6 inches longer than the width, what are the dimensions (length and width) of the picture that could be placed inside?
*Friday, February 8, 2013 at 6:23pm*

**College Algebra **

for the sets {1,3,5,7,9} and {1,2,3,4,5} Define the ¿ and the U.
*Friday, February 8, 2013 at 6:15pm*

**7th grade language arts Ms. Sue please**

1. Which of the following is not a part of evaluating sources? (1 point) checking the author's credentials questioning possible bias making sure the information is current agreeing with the author's opinions 2. Which of the following websites would you most likely use ...
*Friday, February 8, 2013 at 5:47pm*

**english (theses writing)**

hello! :) I am a freshman college student and I am looking for a thesis topic about civil engineering.Can you give me a topic on my thesis about civil engineering? thanks :)
*Friday, February 8, 2013 at 7:39am*

**College Algebra**

The base of a 28 foot ladder is placed 12 feet from the house. How far up house does the ladder reach? (The answer to the nearest tenth of a foot
*Friday, February 8, 2013 at 12:28am*

**College Algebra**

The length of a rectangular carpet is 6 feet greater than twice its width. If the area is 72 square feet, find the carpet's length and width.
*Friday, February 8, 2013 at 12:13am*

**College Algebra**

The distance, d, in feet that an object falls in t seconds is modeled by the formula d=16t(2) if you dive from a height of 128 feet, how long will it take to hit the water? (answer may be in simplified radical form).
*Friday, February 8, 2013 at 12:08am*

**urgent urgent urgent**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. •Explain the chemical process that occurred ...
*Thursday, February 7, 2013 at 11:42am*

**college physics**

a rice grain is sitting on top of an apple, it slides down. where does it come off the apple? assuming the apple is a frictionless sphere. Find the angle with respect to the vertical diameter of the apple.
*Thursday, February 7, 2013 at 2:57am*

**college algebra**

I you are given two real numbers, explain how to determine which one is lesser.
*Thursday, February 7, 2013 at 1:09am*

**college algebra**

Median family income in country x between 1990 and 1999 can be modeled by f(x)=1144.7(x-1990)+35,834 where x is the year. Determine the median income was $42,303. I did it this way don't know if it's right f(x)=1144.7(x-1990)+35,834 42,303-35,834 = 1144.7 - (x-1990) + ...
*Wednesday, February 6, 2013 at 11:26pm*

**college algebra**

Median family income in country x between 1990 and 1999 can be modeled by f(x)=1144.7(x-1990)+35,834 where x is the year. Determine the median income was $42,303. I did it this way don't know if it's right f(x)=1144.7(x-1990)+35,834 42,303-35,834 = 1144.7 - (x-1990) + ...
*Wednesday, February 6, 2013 at 11:03pm*

**urgent urgent urgent**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. explain the process the muscle go through
*Wednesday, February 6, 2013 at 9:11pm*

**college algebra**

Passing thru point (1,4); perpendicular to 2x+y=5 How do I solve this? I think it might be this but not sure please let me know what step I left out Thanks:-) 2x+y=5 y=5-2x y=2x-5 M1=2 4=-1/2(1)+c=1+c C=4 Y=-1/4x-1
*Wednesday, February 6, 2013 at 7:07pm*

**College Algebra**

cubic root of 27x^4 y^13
*Wednesday, February 6, 2013 at 6:16pm*

**college enlish comp 1**

how to write a persasvie eassy on art is therapeutic
*Wednesday, February 6, 2013 at 9:59am*

**Physical Science**

I studied this 2 years ago in college and am no back in school. I can't remember any of this stuff and I really need to figure it out. Please Help Me!! The Latent Heat of Vaporization for water is 540. cal/g. How much heat (in calories) must be added to 10.0 g of water at ...
*Tuesday, February 5, 2013 at 10:05pm*

**College Algebra**

x^3-5x^2+4x-20 > 0 interval notation
*Tuesday, February 5, 2013 at 7:38pm*

**college matematics **

you are dealt one card from a standard 52 card deck find the probability of being dealt a heart
*Tuesday, February 5, 2013 at 4:33pm*

**College Algebra--Still Confused **

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, ...
*Tuesday, February 5, 2013 at 11:18am*

**college chem**

calculate the amount of energy (in kj) necessary to convert 457 g of liquid water from 0 Celecius to water vapor at 167 celcius. the molar heat of vaporization (Hvap) of water is 40.79 jk/mol. the specific heat for water is 4.187 j/g celcius and for steam 1.99 j/mol celcius. (...
*Monday, February 4, 2013 at 11:03pm*

**college chem**

metallic iron crystallizes in a cubic lattice. The unit cell edge length is 287 pm. The density of iron is 7.87 g/cm^3. Calculate the mass (in grams) of one unit cell
*Monday, February 4, 2013 at 11:02pm*

**college chem**

europium crystallizes in a body-centered cubic cell (the Eu atoms occupy only lattice points). calculate the mass of the unit cells
*Monday, February 4, 2013 at 11:02pm*

**college chem**

calculate the amount of heat (in kj) required to convert 140.1 g of water to steam at 100c
*Monday, February 4, 2013 at 11:01pm*

**College Algebra**

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, ...
*Monday, February 4, 2013 at 9:21pm*

**College Algebra help!!!**

I have to solve each equation using a u substitution and need help understanding how to do this. The first equation is: 1. x^2/3-2x^1/3-15=0 2. x+4=7 Squareroot x+4
*Monday, February 4, 2013 at 7:44pm*

**college chemistry**

How many grams would you weigh out to get 3.1 X 10-3 Moles of MgCl2?
*Monday, February 4, 2013 at 12:26pm*

**college mathematics **

Three people are to be selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person selected gets the third ...
*Monday, February 4, 2013 at 10:30am*

**PLEASE CHECK THESE ANSWERS AMERICAN GOV**

1. The nerve center of the American Presidency is (C) the President’s Cabinet. the Executive Office of the President. the Congressional houses. the Civil Service. 2. Presidential elections include all of the following except (D) participatory caucuses. primary elections. ...
*Sunday, February 3, 2013 at 3:01pm*

**statistics**

1. The scores on a standardized test for high school students are normally distributed with a population mean of 500 and a population standard deviation of 100. Use the empirical rule (0LI refers to this as the standard deviation rule.). Make sure you provide graphs for each ...
*Sunday, February 3, 2013 at 12:26pm*

**Community technical college **

Given that 1st term of an A.P is 7 and it's 10th term is twice the second term,calculate the (a) 19th term (b)sum of 28 terms (c) difference between 9th and 6th terms
*Sunday, February 3, 2013 at 9:16am*

**college algebra**

Find y when x=1/2, if y=3/2 when x=10 How do you work this?
*Saturday, February 2, 2013 at 11:06pm*

**college general chemistry**

Calculate the volume of a rectangular solid with a thickness of 0.750 cm and an area of 8.25 cm2
*Saturday, February 2, 2013 at 10:22pm*

**college algebra**

Direct variation Find y when x=5, if y=7 when x=14 I think the answer is 2.5 but don't know for sure:-)
*Saturday, February 2, 2013 at 9:55pm*

**college algebra**

Slope intercept Vertical, passing (5,-1) Do you solve like this? M1= m/5-5m M=5
*Saturday, February 2, 2013 at 8:31pm*

**college algebra**

Write slope-intercept equation Passing thru the points (-6,-9) and (0,8) I think it's this just making sure: M=(8-(-9))/(0-(-6)) =17/6 Y= -17/6x+36/6 Y=-17/6x-6 M=17/6 and Y=-6
*Saturday, February 2, 2013 at 7:38pm*

**Math**

A random sample of 42 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the .99 degree of confidence, what is the confidence interval for the population mean?
*Saturday, February 2, 2013 at 3:20pm*

**basic college math**

write 14.825 as a faction
*Saturday, February 2, 2013 at 12:32pm*

**basic college math**

what is 4/13 written as a decimal?
*Saturday, February 2, 2013 at 11:52am*

**College Algebra**

3x^4=648x someone help please im so confused. i am trying to find the solution set?
*Friday, February 1, 2013 at 12:26pm*

**college chem**

A researcher explores the ideal gas equation. He measures the pressure of a system at different temperatures ( keeping the volume and moles of the gas constant) and creates a plot of P versus T. What is the slope of the line that results if the volume is 1.0L when 1.0 mol of ...
*Friday, February 1, 2013 at 12:09am*

**college algebrea**

(3x)/(x+2)=9-(6)/(x+2)
*Wednesday, January 30, 2013 at 10:37pm*

**penn foster**

im trying to finish these classes soon so i can start college, but honestly they are too complex. and i NEED HELP!!!! I have 1-5 done. 6. In the Mongol Empire, the plague A. provided new oppurtunities for territorial expansion B.ended further expansion C. had no effect, ...
*Wednesday, January 30, 2013 at 10:15am*

**College Chemistry**

what might be the reason that this is happening: During a simple distillation i have 14ml or 50/50 hexane;toluene mixture in a 25mL round-bottom flask. However, by the time i collected 8ml of distillate there were no liquid left in the flask.
*Tuesday, January 29, 2013 at 9:56pm*

**stats **

identify the independent and dependent variable A group of college students were given a short course in speed-reading. The instructor was curious if a monetary incentive would influence performance on a reading test taken at the end of the course. Half the students were ...
*Tuesday, January 29, 2013 at 7:30pm*

**college algebra**

Identify where f increases and where f decreases. f(x)=5x+3 I think it's (3,5) increases and (3,-2) decreases?
*Tuesday, January 29, 2013 at 5:49pm*

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