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October 20, 2014

Posts by elizabeth


Total # Posts: 825

Chemistry
Please help me Sketch a separation scheme showing how you would separate the following two component mixture: m-nitroaniline and hexanol. All the substances are soluble in ether. You can use any of the following solutions in your separation: aqueous hydrochloric acid, aqueous ...
February 4, 2010

Pre-Algebra B
5 | 4,5,5,6,6,6,7,8,8,9 6 | 0,0,1,1,2,2,2,3,4,4,4,5,6,7 7 | 0,1,1,1 How do you find the mean of this stem-and-leaf plot? Please answer!!
January 23, 2010

Mathematics in Economy
I'd like to add that the '2' after x and y means 'squared'.
January 18, 2010

Mathematics in Economy
A firm produces two different kinds A and B of a commodity. The daily cost of producing x units of A and y units of B is C(x,y) = 0.04x2 + 0.01xy + 0.01y2 +4x + 2y +500 Suppose that firm sells all its output at a price per unit of 15 for A and 9 for B. Find the daily ...
January 18, 2010

Geometry
If each side of a regular pentagon is x^2 + 17 and each side of a regular hexagon is x^2 + 2x, for what value or values of x will the perimeters of the figures be equal?
January 17, 2010

math
Quadrant 2
January 17, 2010

reading response to the personwho answered this
thank you!! Ireally apreciate it!!
January 14, 2010

reading
when a prarie fire approached,farmers set __. What would it be? Please help me!!
January 14, 2010

pre-algebra B
Milli tosses a coin and a six-sided die.The numbers on the die are 1 through 6. What is the probability that Milli will toss a tail and roll an odd number?
January 12, 2010

english
Is there an adjective to describe someone who performs critical thinking?
January 7, 2010

math
evaluate the expression for the given value of the variable p + 13 when p = 8
January 7, 2010

Pre-Algebra B
The selling price of a bicycle that had sold for $220 last year was increased by 15%. What is the new price? Please answer within 5-10 minutes.
December 26, 2009

math
a ski slope at a mountain has an angle of elevation of 25.2 degrees. the vertical height of the slope is 1808 feet. how long is the ski slope. show diagram
December 14, 2009

SCIENCE
HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?
December 14, 2009

math
When a coin is tossed four times, sixteen equally likely outcomes are possible as shown below: HHHH HHHT HHTH HHTT HTHH HTHT HTTH HTTT THHH THHT THTH THTT TTHH TTHT TTTH TTTT Let X denote the total number of tails obtained in the four tosses. Find the probability distribution ...
December 5, 2009

Math
Determine whether the situation calls for a discrete or continuous random variable. 8) The cost of a randomly selected orange 9) The pH level in a shampoo 10) The braking time of a car 11) The number of field goals kicked in a football game
December 5, 2009

Physics
OK i have one attempt left, first i change the gauge pressue to newton/m^2? And since P= F/A solve for A after making f = 1440*g? Theni have to divide it by 4 for every tire? but im having trouble with conversions, and my final answer being in cm^2. SOOO confused
December 4, 2009

Physics
Hi I tried asking this question yesterday but still had some confusion.Since the area must be in cm^2. IP The weight of your 1440 kg car is supported equally by its four tires, each inflated to a gauge pressure of 30.0 lb/in^2 . What is the area of contact each tire makes with...
December 4, 2009

Physics
so if the answer wants cm^2 what would be the conversion?
December 3, 2009

Physics
Hey can someone help, im having trouble converting alot. IP The weight of your 1440 kg car is supported equally by its four tires, each inflated to a gauge pressure of 30.0 lb/in^2. What is the area of contact each tire makes with the road? What gauge pressure is required to ...
December 3, 2009

6th grade
what are the parts of a plant cell
December 2, 2009

Pre-Algebra B
Find the area of a circle whose radius is 12.7 cm
November 30, 2009

Computer Science
What is the halting problem? What does it have to do with self referential paradoxes? How do I make sense of this? "So suppose I have a black box which can decide the halting problem, that is I can give it a program P and the box tells me if P will ever stop. Using this I...
November 22, 2009

Physics
The applied force is W = Fdcos(theta).
November 18, 2009

physics
A 10g marble is spun so that it rolls at 150rpm around the inside of a steel tube. The tube has a 12cm diameter. Assume the rolling resistance is small enough for the marble to maintain 150rpm for several seconds. During this time, will the marble spin in a horizontal circle ...
November 15, 2009

physics
A 30g ball rolls around a 40cm diameter L-shaped track at 60rpm. What is the magnitude of the net force that the track exerts on the ball? rolling friction can be neglected.
November 15, 2009

Pre- Algebra
-6x-15>57
November 12, 2009

Math (calc)
yes that's what I thought. Thank you!
November 7, 2009

Math (calc)
Given the function: f(x)=x^3(x-2)^2 , on the interval [-1,3] find the domain and Asymptotes ...Isn't the domain (-1<x<3) ? and as for the asymptotes I thought you could only find them for rational functions and since that function is not rational I guess there aren&#...
November 7, 2009

Earth Science
Earth is always changing. What are two forces that cause the earth's surface to constantly change and what are their effects on the planet? Please answer within a few minutes.
November 4, 2009

Life Science
By living in areas where other organisms inhabit,humans change the environmental conditions for those organisms. Describe two ways humans impact the environment and what the effects are on the earth? Thesse can either be positive or negative. Please answer in a few minutes.
November 3, 2009

Math
This is the layout of the McDougal's backyard.The scale is 1 centimeters to 5 centimeters.The actual area of the pool is 375 square meters.The length of the pool is 25 meters. How do I find the area of the pool on the layout?
October 26, 2009

Math
45?
October 26, 2009

Math
This is the layout of the McDougal's backyard.The scale is 1 centimeter to 5 meters.The length of the deck on the layout is 7 centimeters.The width of the deck on the deck is 2 centimeters. What is the actual perimeter of the deck? Pls answer within the next minute and ...
October 26, 2009

Math
96 my multiplication was wrong.Sorry
October 26, 2009

Math
9.6 Thanks!
October 26, 2009

Math
Round your answer to the nearest whole number when necessary. In a basketball game,Ivring scored 80% of the teams points.If team as a whole scored 120 points,how many points did Ivring score? PLS answer within the next minute!!
October 26, 2009

physics
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weaker gravity is at h = 330 km above ...
October 12, 2009

physics
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weaker gravity is at h = 330 km above ...
October 12, 2009

Computer Science
Running time is 1,2,3,4,5,6,7,8,9,10. It sll got put together, but really those numbers are separate from the n numbers
October 12, 2009

Computer Science
I am learning in my computer science class about algorithms. My teacher wrote on the board: n= 1 running time= 1 3 1+1= 2 7 1+2= 3 15 1+3= 4 31 1+4=5 63 1+5= 6 127 7 255 8 511 9 1023 10 How in the world does this happen? It has something to do with log n steps. I don't ...
October 12, 2009

4 grade FL social studies weekly
Do you know how Fort Caroline and Missions San Luis are alike.
October 9, 2009

Biology
solid, liquid, gase
September 22, 2009

biology
studying genetics in mammals where can i find out about felines and canines that are proven mainly allergen free, thought not genetically modified?
September 22, 2009

algebra
Do you know where I can get this worksheet online to print?
September 17, 2009

English
Thank you Ms.Sue But then on this one: Many stories have been written about the old Spanish Main. The simple predicate would be: "have been written"? Thanks and have a good one.
September 16, 2009

english
I need to find the simple subject and simple predicate: Every sentence should begin with a capital letter. I know that "sentence" is the simple subject but I'm not sure if the simple predicate must include the word "should" or if it's just "...
September 16, 2009

psychology
•Describe neurotransmitters. Explain what they are, their function within the body, and their impact on behavior. •Describe the connection between neurons and neurotransmitters. •Choose two neurotransmitters and discuss their function within the body. Discuss ...
September 12, 2009

Science
thanks.:-)
September 9, 2009

Science
What is an energy production pyramid??
September 9, 2009

Social studies
Yeah. They lived in the Southweast which is a desert. Then, the correct answer is A.
September 2, 2009

Social studies
C
September 2, 2009

Social studies
Why did the ancient puebloans most likely use materials other than wood to build their homes? A. Few trees grew in the dry climate in which they lived B. Wood was considered too sacred to use for building C.They were nomads and needed to move their homes quiclky D. The Ice Age...
September 2, 2009

10th grade
explain how to add measurements of segments 18.4 4.7 p to q to s
August 27, 2009

math
60
August 4, 2009

Math
Linda got a math test handed back to her and got a 96% on it. However she lost the test, not knowing what she got. If she knows that she scored a 43 on the test then how many 1- mark questions are there on the test?
July 15, 2009

Maths
What is 6:1/2= 6:12= 6:2= ?
June 18, 2009

Math
i do not understand what you are saying...i need to find the probability of getting 2heads combined with rolling a four on a number cube
June 17, 2009

Math
2 coins and 1 six sided cube are tossed. What is the probability of getting two heads and and a four?
June 17, 2009

12th grade
what are substitutes
June 9, 2009

Accounting
prepared an adjusted trail balance, journalizing, posting and prepaid a financial statements would be completed last
May 24, 2009

Chemistry I
A scuba diver's tank contains 0.23 kg of O2 compressed into a volume of 3.5 L. (a) Calculate the gas pressure inside the tank at 11°C. ________atm (b) What volume would this oxygen occupy at 20°C and 0.92 atm? ________L what are the formulas for this problem?
May 17, 2009

Chemistry
ok so... sqrt(3 x 8.314 x 289/146.056) = 7.025 m/s is that right?
May 17, 2009

fractions in input output table
what is the rule for the input and the output
May 14, 2009

math
what is the equation for the function table X= 4 5 6 7 12 Y= -2 0 2 4 ?
April 20, 2009

Math
Find the distance between A and B, where A and B have the following coordinates: A(–3, 5); B(5, –8). Show your work by using the notation sqrt( ) for square root.
April 16, 2009

science
your mama
March 30, 2009

algebra 1p
5(x-3)-3(x-1)
March 24, 2009

first aid
laceration to foream which is actively bleeding. what should the - Immediate action to pervent further injury. How to assess the injury first aid procedures the next stage what happends to the casualty? and How?
March 15, 2009

sports
why is strenght endurance speed flexibility body composition agility balance co-ordination power reaction time all important to an athlete
March 13, 2009

science
I have a bill like a duck, But the hair of a mammal i lay eggs like a bird, But I nurse my young what am I?
March 11, 2009

biology
the process of disjunction occurs during what?
March 4, 2009

sport
why will these lifestyle factors effect performance in sport. smoking drinking stress diet.
March 3, 2009

business law
where do i go to find stuff on lawfirm expanding to nearby ciy and staes
February 22, 2009

medical
hi my friend has moved to spain and has taken ill they say she has FEBRA but know one knows what this is any help would be greatfull
February 22, 2009

9th grade science
what three ways can you charge an object?- grade 9 physics(science)
January 8, 2009

algebra
the area of a pizza is 220 square centimeters. what is the radius
January 7, 2009

Math
-7+3
January 7, 2009

science
if the mass of an object is 20g and the volume of the object is 100ml what is the density of the object
December 14, 2008

calculus
so far i have dR/R = kdt ln R = kt + C am i on the right track? what do i do next?
December 7, 2008

calculus
solve the differential equation. assume a, b and k are non zero constants. dR/dt = kR i don't understand how to do these problems.
December 7, 2008

help plzzz
I got A LINE OF CHORUS GIRLS
December 3, 2008

proportions
x over 100/125 = 75/225 over 4/25 what is x and how do you get the answer please
November 30, 2008

proportions
3/8 over 3 = x over 5/12
November 30, 2008

spanish
that word does not exist in spanish
November 30, 2008

proportions
3/8 x __ = __ 3 5/12
November 30, 2008

6th grade algebra
3/8 + x __ __ 3 5/12
November 30, 2008

economics
According to liquidity preference theory, the slope of the money demand curve is explained as follows: a. interest rates rise as the Fed reduces the quantity of money demanded. b. interest rates fall as the Fed reduces the supply of money. c. people will want to hold less ...
November 25, 2008

Physics
Blocks of mass m1 and m2 are connected by a massless string that passes over a frictionless pulley. Mass m1 slides on a frictionless surface. Mass m2 is released while the blocks are at rest. The pulley is a solid disk with a mass mp and a radius R. Use conservation of energy ...
November 24, 2008

Chemistry!
Calculate the work involved if a reaction with an enthalpy change of -2418 kJ is carried out in a vessel with a mobile, frictionless piston. Other details: the reaction is H2(g) + 1/2Oxygen2(g) yields H2O(g) with enthalpy change of -241.8 kJ/mol. The product is 180.16gH2O=10....
November 23, 2008

3rd grade
Please help me to rhyming words. The word is sleep. And I need to use this words: strret,please,free,whel,resd,queen,each,sneeze,people,meet,team sea.need,dream,meat. Can you plaese let me know which one rhym, Thank you. 3rd grader need help!!!!
November 5, 2008

MATH- LINEAR PROGRAMMING
THE PENN-OHIO BUILDING COMPANY BUILDS AND SELLS TWO TYPES OF HOUSES:"CLEVELAND CASTLES" AND "PITTSBUTGH PALACES". CONTRACTS CALL FOR USING TOTALS OF AT LEAST 20,000 FT OF FRAMING LUMBER AND 8,000 CUBIC FT OF CONCRETE; AND AT LEAST $9,000 FOR PROMOTION AND ...
November 5, 2008

ecomonics
I am trying to understand the math part of supply and demand . I am not getting it,I really need help! The question is: The demand and supply functions for sweatshirts are as follows: DEMAND Supply Quanity Quanity demanded(per period) supplied(/peri price__ price 10-----15,000...
November 5, 2008

mth
Add the two vote counts up and then divide 7,310 by that number (21,500) and you get 34%
October 20, 2008

History
Thank you Writeacher. I was looking at the wrong Article.
October 19, 2008

History
According to the U.S Constitution, what two duties do states have to other states?
October 19, 2008

9th grade
thanks ms. sue eventhough i dont know you thanks again
October 8, 2008

9th grade
acrostic poem on p h o t o s y n t h e s i s
October 8, 2008

Geometry
what do u need help on
October 7, 2008

Geometry
how do you solve for endpinnts??? My teacher dosn't explain it good and I doon't get it. Help Please!
October 7, 2008

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