Thursday
December 18, 2014

Posts by ann


Total # Posts: 1,265

algebra
rational expression 2y+1 y^2-y-6
February 11, 2011

geometry
a rectangular box has dimensions 9cm by 6 cm by 24 cm. a second rectangular box has volume one-half of the first and has a base 6 cm by 4 cm.what is the height of the second box
February 9, 2011

college physical science
What is the force exerted by a train travelling from rest to 120 mph in 15 min? The train weighs 200,000 lbs.
February 8, 2011

geometry
Parallelogram has sides with lengths of 10 centimeters and 20 centimeters, What is the height in centimeters?
February 5, 2011

Statistics
A lottery ticket costs $1 and the prize is $28,000,000. The probability of winning is .000000023. What is the expected value of a ticket?
February 5, 2011

economics
Redstone Clayworks, Inc. is located in Sedona, Arizona and manufactures clay fire pits for patios. They are one of about two dozen firms around the world that manufacture and sell clay fire pits for retailers such as Home Depot, Lowe’s, Front Gate, and other upscale home ...
February 4, 2011

Economics
If Redstone wanted to minimize average total cost, it would produce how many units?
February 3, 2011

Science
I am doing a 3rd grade science project on the Sun. I have to create a "visual". I want to compare the size of the earth to the size of the sun. I found that you could put 1,000,000 earths inside the Sun. I would like to fill a container [representing the Sun] with ...
February 2, 2011

Chemistry
Is thalidomide a cis isomer or a trans isomers? Thanks
January 31, 2011

Chemistry
Is thalidomide a cis isomer or a trans isomers? Thanks
January 31, 2011

Chemistry
Is thalidomide a cis isomer or a trans isomers? Thanks
January 31, 2011

pop culture and the arts
I need to give two examples that illustrate the relationship between art and American culture.
January 29, 2011

Chemistry
If the molar volume of a gas is 22.42L, what volume will 39.67 moles of this gas have. My answer, (22.42)(39.67) = 889.4L IS this right? Thanks.
January 28, 2011

math
what is the anwser to 5 hundreds and 12 ten
January 26, 2011

math
the anwser is 620
January 26, 2011

math
what number has 5 hundreds and 12 tens
January 26, 2011

Algebra 1
Two sides of a triangle have the same length. The remaining side is one third as long as each of the other sides. If the perimeter of the triangle is 315 cm, what is the length of each side?
January 26, 2011

Algebra 1
Two sides of a triangle have the same length. The remaining side is one third as long as each of the other sides. If the perimeter of the triangle is 315 cm, what is the length of each side?
January 26, 2011

chemistry
What does sulfur water, sodium bicarbonate and citric acid yield? Is the sulfur smell H2S and/or in any SO2 given off?
January 23, 2011

Physics
Driving in your car with a constant speed of 12 m s you encounter a bump in the road that has a circular cross-section. The radius of curvature of the bump is 35.2 m. At what speed must you go over the bump if people in your car are to feel "weightless"?
January 23, 2011

English
The procedure applies to the assigning of expiry dates for milk products. or The procedure applies to the assignment of expiry dates for milk products. Which is correct?
January 18, 2011

English
1)as per the guidelines.... 2)per the guidelines... Which is correct?
January 16, 2011

physics
A ventilation fan has blades 0.25 m in radius rotating at 20rpm. What is the tangential speed of each blade tip? i don't understand how to do tangential speed.
January 11, 2011

statistics
no uniformly distribution
January 11, 2011

statistics
the scheduled commuting time on Long Island Rail Road from Glen Cove to New York is 65 minutes. Suppose that the actual commuting time is uniformly distributed between 64 and 74 minutes. What is the probability that the commuting time will be a) less than 70 minutes B) between...
January 11, 2011

Finance
-a: The dividend yield for AT&T is 3.6%; for Boeing it is 1.6%; and for Johnson & Johnson it is 2.5%. -b: The difference is the expected earnings and dividend growth, with AT&T likely having the lowest expected growth and Boeing the highest expected growth. -c: P/E for Boeing...
January 10, 2011

algebra
function f(x)=2x^2-3x f(0)= f(-1)= f(2)=
January 9, 2011

probability and statistics
Is this right? and how can I break it down if needed? A factory’s worker productivity is normally distributed. One worker produces an average of 75 units per day with a standard deviation of 20. Another worker produces at an average rate of 65 per day with a standard ...
January 9, 2011

statistics
a study of the time spent shopping in a supermarket for a market basket of 20 specific items showed an approximately uniform distribution between 20 minutes and 40 minutes. What is the probability that the shopping time will be a) between 25 and 30 minutes? b) less than 35 ...
January 6, 2011

Math (Reiny)
Reiny, Thank you so very much!!!
January 5, 2011

Math (Reiny)
Regarding my question below, when the question talks about digits 0-7 do we include the 0. In other words, are the possible digits 0,1,2,3,4,5,6,7 or 1,2,3,4,5,6,7? Thanks again for your help. How many odd four-digit numbers, all of the digit different can be formed from the ...
January 5, 2011

Math
Reiny, Thanks but I'm stumped on part 3 of the explanation for the first case. We have used up 2 digits when we move on to the second space but didn't we start with 8 digits (0-7) so I don't understand why we aren't left with 6 choices for the second spot (8-2...
January 5, 2011

Math
How many odd four-digit numbers, all of the digit different can be formed from the digits 0 to 7, if there must be a 4 in the number? My Answer: There are four options for the last digit (1, 3, 5, or 7). One of the other three digits only has 1 option (for the 4). One of the ...
January 5, 2011

algebra
4x+9y=52 x=35-5y
January 4, 2011

grade 9 science biology
how can be measure co2 in atmosphere
January 2, 2011

Psychology
I'll look. Thank You.
December 22, 2010

Psychology
Thank you Ms.Sue. I do understand that, however I'm looking for the technical term. I thought it was spontaneous recovery but it doesn't seem to be a conditioned and uncoditioned response/stimuli. Can you please help me? Thanks.
December 22, 2010

Psychology
Your three little brothers-John,Peter and James get the same gift for Christmas-an ice fishing pole. Your father is curious about how children learn and decides he will teach each of them using different means. With John, he gives him a verbal lecture. With peter, he ...
December 22, 2010

History
How and why did Eisenhower use the politics of consensus with Congress to achieve compromise
December 19, 2010

Physics
A beam of particles have a measured life time of 1.5 x 10-8 s when traveling 2.0 x 108 m/s. What would their lifetime be if they were at rest? My Answer: tm= tp/√(1-(v2/c2)) (1.5*10-8) = tp/√(1-((2*108)2/(3*108)2)) (1.5*10-8) = tp/√(1-((4*1016)/(9*1016)) (1.5...
December 14, 2010

algebra
Two factors, each with no digit greater than 5, have a product of 16,848. What is the largest possible 3-digit factor satisfying these conditions?
December 14, 2010

algebra
How many cubic feet are in the volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? Express your answer in terms of pi.
December 14, 2010

Algebra
The faces on a regular octahedral die are numbered one through eight. What is the probability of rolling 3 sixes in succession? Express your answer as a common fraction.
December 14, 2010

Physics
A person places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At that point he notices ...
December 13, 2010

Physics
A person places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At that point he notices ...
December 13, 2010

Business
Based on this financial info where a company's Beta Year = 2008, the Company's commons stock = 0.85, the Risk-Free Rate of Return = 5%, and the Market Risk Premium = 6%. Use the dividend growth model to calculate the Company's Common Stock in 2008. Stock 1 = 1.5, ...
December 9, 2010

Pre-Calc
Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uv-plane that has twice the circumference of the circle whose equation equals (u-5)^2 + y^2 =9
December 7, 2010

chemm
When a reaction mixture with a total volume of 1180 mL that is 0.0110 M aqueous NaCl was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0116 M aqueous Ca2+ was required? 3 CaCl2(aq) + 2 Na3PO4(aq) → Ca3(PO4)2(s) + 6 NaCl(aq) Molar Mass (g...
December 7, 2010

chemistry
If 840 mL of 0.0140 M aqueous Al3+ and 500 mL of 0.0680 M aqueous Br- are reacted, what mass (g) of Br- is produced? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) Molar Mass (g) Br- 79.904 Al3+ 26.982 Br- 79.904 Molar Volume (L) 22.400 at STP Gas Constant 0.0821
December 7, 2010

Chemistry
Does HCl form a precipitate with NaClO?
December 6, 2010

physics
To balance a 40.8-kg automobile tire and wheel, a mechanic must place a 41.7-g lead weight 25.0 cm from the center of the wheel. When the wheel is balanced, its center of mass is exactly at the center of the wheel. How far from the center of the wheel was its center of mass ...
December 2, 2010

Pre-Calculus
Thank you a 1000 times Reiny!
December 2, 2010

Pre-Calculus
It is well known that superman can withstand as much as 3 grams of Green Kryptonite indefinitely. However, exposure to more than 3 grams for more than 13 hours is fatal. Assume that Kryptonite decays at an hourly rate of 5.35% If superman is trapped in a room with 6 grams of ...
December 2, 2010

PRE-CALC
A drug is eliminated from the body through urine. Suppose that for an initial dose of 10 milligrams, the amount A (t) in the body t hours later is given by A(t) = 10(0.8) t a) Estimate the amount of the drug in the body 8 hours after the initial dose. b) What percent of the ...
December 2, 2010

Pre-Calc
Amount after time t A (t) = yobt Where: yo = starting amount b = growth constant (percent remaining) t = number of time units It is well known that superman can withstand as much as 3 grams of Green Kryptonite indefinitely. However, exposure to more than 3 grams for more than ...
December 2, 2010

thefacility
003048
December 1, 2010

the staff
003049
December 1, 2010

PHYSICS
Thank YOu!
November 29, 2010

PHYSICS
1)A picture of width 40 cm weighing 40N hangs from a nail by means of flexible wire attached to the sides of the picture frame. The midpoint of the wire passes over the nail which is 3 cm higher than the points where the wire is attached to the frame. Find the tension of the ...
November 29, 2010

Chemistry
A solution that has an osmotic pressure greater than that of red blood cells is called?
November 29, 2010

Chemistry
What is the concentration, in w/w%, of a solution prepared from 50.0 grams NaCl and 150.0 grams of water? I think it would be 25.0%, but I'm struggling with these new concentration calculations.
November 29, 2010

college, teaching
obstacles in the first year of teaching
November 27, 2010

Chemistry
Sodium oxide, reacts with water to give NaOH. A) Write a balance equation? B)What is the pH of the solution prepared by allowing 1.55 g of Na2O to react with 500.0 ml of water? (assume there is no volume change) C) How many milliliters of 0.0100M HCL are needed to neutralize ...
November 21, 2010

Verb tense
Dinnie does pay bills online each month.
November 21, 2010

health,safety and nutrition
Why health, safety and nutrition strategies are important ti identify and practice in an early childhood education programs.
November 20, 2010

English
The packet of biscuits has passed its expiry date or The packet of biscuits has past its expiry date. Or both sentences correct?
November 20, 2010

English
There is a host of reasons... or There are a host of reasons.... Which is correct?
November 20, 2010

physics
A person places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At that point he notices ...
November 13, 2010

Chemistry-Please Help!
I have these 5 chemical equations and I keep getting the same 1:1 ratio on all of them. I must be doing something wrong! KCL + NaNO3 = KNO3 + NaCl HNO3 + KOH = H2O + KNO3 H2O + SO3 = H2SO4 4Na + O2 = 2Na2O 2NO2 = 2NO + O2
November 11, 2010

Chemistry
What would be the molecular ratio of the following equation? 2NO2 = 2NO + O2
November 11, 2010

algebra
write the slope-intercept equation for the line that passes through(4,3) and has slope 5/4.
November 9, 2010

FIT
Joe Nautilus has $120,000 and wants to retire. What return must his money earn so he may receive annual benefits of $20,000 for the next 14 years?
November 2, 2010

Statistics
What type of data must you collect to conduct a t-test? Why?
November 1, 2010

Algebra
Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: C(g) = (3.5)g a) Find C(2) b) Find C(5)
October 28, 2010

Physics
Also it's not 1800, it's 1/800 so it would be: .046kg * 44 = 2.024 2.024/(1/800) It should equal = 1619.2 Check your answer but that should be it, especially if they're asking you in units of N
October 27, 2010

Physics
Also it's not 1800, it's 1/800
October 27, 2010

English
With reference to an earlier question:- The liquid is to be scooped at a quarter of the depth of the container it is in. Hence the first sentence is correct? Or is there a better way of phrasing? The liquid should be scooped at a quarter depth of the container? Posted by ann ...
October 26, 2010

English
1)Please advise us on the status of our application. 2)Please advise the status of our application. Which sentence is correct?
October 26, 2010

English
The liquid is to be scooped at a quarter of the depth of the container holding it is in. Hence the first sentence is correct? Or is there a better way of phrasing?
October 26, 2010

English
The liquid should be scooped at a quarter depth. or The liquid should be scooped at a quarter depths. Which is correct?
October 26, 2010

English
"Your prompt action in providing the information by tomorrow would be appreciated." Is the above sentence correct?
October 24, 2010

English
Which sentence is correct? 1) Please provide the shelf life information on the following biscuits: - or 2) Please provide the shelf life information of the following biscuits: -
October 24, 2010

English
Is the following sentence correct? Please provide us with the requisite information on the product.
October 24, 2010

English
Please expedite in providing all necessary documents. Is this sentence grammatically correct?
October 23, 2010

AED 201
I think that is where I am confused to. It just says the first technological event in education and then the second for each time period. I have found one website that helped, im not sure if it is the correct information, but it only went up until 2000. I am still looking for ...
October 23, 2010

AED 201
I am looking for information on the use of technology in school. I need the 1st and 2nd event from 1980, 1990 and 2000. Ive been searching since yesterday. I do not want the answers, just pointed in the right direction. I guess im not searching right or something Thank you.
October 23, 2010

History
In their reporting of elections, the media tend to place cendidates and issues in the context of
October 21, 2010

Math
Explain how the digit 1 can have a different values in 111
October 21, 2010

math
which decimal has the highest number 4.1, 6.3, 0.31
October 20, 2010

Chemistry
Posted by ann on Sunday, October 17, 2010 at 4:26am. In melting point determination, why shouldn't a substance be re-melted? (i.e. why should we not re-melt a substance that has previously been melted in a melting point tube?)
October 17, 2010

Chemistry
In melting point determination, why shouldn't a substance be re-melted? (i.e. why should we not re-melt a substance that has previously been melted in a melting point tube?)
October 17, 2010

English
1) Minimize versus minimise. Which is UK English & which is US English? 2) After cleaning, all waste must be properly disposed of. Is this sentence acceptable?
October 16, 2010

Comm/155
I am trying to write a brief paragraph using five adverbs and five adjectives in describing my experience with credit and credit cards?
October 12, 2010

chemistry
A water containing 1x10^-4 mol CO2/L and having an alkalinity of 2.5x10^-4 eq/L has a pH of 6.7. The pH is to be raised to pH 8.3 with NaOH. How many moles of NaOH per liter of water are needed for this pH adjustment? (pK1=6.3 and pK2=10.3)
October 12, 2010

Chemistry
Is butyl paraben light sensitive?
October 9, 2010

computers
James was traveling for his job. The internet card provided by his company was not working and he had an important project due that day. James was in a small town about an hour away from the nearest internet kiosk, so he decided to drive around a nearby suburb to see if he ...
September 30, 2010

accounting
general ledger entry: sold $700 of merchandise (that had cost $220) on credit to Sam's Company.
September 26, 2010

social studies
what role did geography play in the economic success of new york
September 24, 2010

math
In this problem the letters x and y are each one digit numbers. Compare x+y O 19? Do I put any number for x and y ? please help. Your answer was no but how do I do this problem? I'm sorry, I mean <,>,or =. Thank You for your help.
September 22, 2010

math
In this problem the letters x and y are each one digit numbers. Compare x+y O 19? Do I put any number for x and y ? please help. Your answer was no but how do I do this problem?
September 22, 2010

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