Tuesday
October 21, 2014

Posts by Jessica


Total # Posts: 2,639

math111(2)
Suppose h(x) = x^2 + 8 x + 5, with the domain of h being the set of positive numbers. Evaluate h^{-1}(8).
October 27, 2010

math111
Suppose the graph of f is a parabola with vertex at (2,1). Suppose g(x) = 3 x + 2. a) What are the coordinates of the vertex of the graph of g(composed)f? b) What are the coordinates of the vertex of the graph of f(composed)g?
October 27, 2010

Chemistry
How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc. mass Hg = volume x density Then convert to moles. Then remember there are 6.022E23 atoms for every mole. I still don't get how to do this! HELP ME!!!
October 27, 2010

Chemistry
1. Calculate the number of moles of carbon atoms present in 2.4g of ethanol (C2H6O). 2. What is the % Nitrogen by weight in 3.696 mol of ammonium sulfide. 3. How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc.
October 27, 2010

chemistry
How to make into compounds to get a formula? Li+: Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cu:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Pb2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Ca2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Al3+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cr5+:Br-, O2-, CN-, SO3^2-, ...
October 27, 2010

literary
Thank you!
October 27, 2010

literary
In what distant deeps or skies Burnt the fire of thine eyes? On what wings dare he aspire? What the hand dare seize the fire? and Tyger! Tyger! burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry? Are "In what distant ...
October 27, 2010

Math 111
Thank you so much!!!
October 27, 2010

Math 111
Find the quadratic function that has vertex (-1, 8) and whose graph goes through the point (8, 170). I could not understand this problem I Can not for the lift of me get it. I got as far as some number(x+1)^2+8 but i dont know what the number before all that would be for the ...
October 27, 2010

Chemistry
How to make into compounds to get a formula? Li+: Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cu:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Pb2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Ca2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Al3+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cr5+:Br-, O2-, CN-, SO3^2-, ...
October 27, 2010

MATH
Earth, Jupiter, and Uranus all revolve around the sun. Earth takes 1 yr, Jupiter 12 yr, Saturn 30 yr, and Uranus 84 yr to make a complete revolution. One night, you look at those three distant planets and wonder how many years it will take before they have the same position ...
October 27, 2010

Math
She will have 56.00
October 27, 2010

physics
A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. What will be it's speed when it strikes the ground below?
October 26, 2010

english
Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives
October 25, 2010

College Chemistry
1) A 25mL sample of the .265M HCI solution from the previous question is titrated with a solution of NaOH. 28.25mL of the NaOH solution is required to titrate the HCl. Calculate the molarity of the NaOH solution. 2) A 1.12g sample of an unknown monoprotic acid is titrated with...
October 25, 2010

Organic Chemistry
Separation scheme for isolating benzoic acid Could you please show me a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard reagent phenylmagnesium bromide with dry ice (CO2) in ether? Thanks!
October 22, 2010

Science
Separation scheme for isolating benzoic acid Could you please show me a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard reagent phenylmagnesium bromide with dry ice (CO2) in ether? Thanks!
October 22, 2010

Chemistry
17.606gNa2CO3(mol Na2CO3/106gNa2CO3)*(2molNa/molNa2CO3)* (23gNa/molNa)= 7.64gNa
October 22, 2010

Chemistry
Which of the following elements has an ionic radius greater than its atomic radius a) Ca c) Fe b) Li d) N
October 21, 2010

government
Who can impose the draft and under what circumstances?
October 21, 2010

Spanish
El alumno o el profesor? complete each sentence with the appropriate word. 1. En una escuela americana "A" es una nota ________ y "f" es una nota ________. 2. El profesor_________; el alumno ________ la pizarra. i think number 1 is buena & mala but im not ...
October 19, 2010

english
Define sentence variety and rhythm in your own words and explain how they interact in effective writing
October 18, 2010

english
By adding sentence variety in writing you can give it life and rhythm. Your readers can be bored by reading too many sentences with the same structure and length. It can grow to be monotonous for readers.
October 18, 2010

Chemistry
so that means the ion is smaller because your removing the 2 outside electrons ?
October 17, 2010

Chemistry
Which has a larger radius, Mg or Mg+2? Explain why. Thanks ! I think its Mg+2 but im not sure why.
October 17, 2010

chemistry
write a balanced chemical reaction for the reaction of aqueous magnesium chloride with aqueous potassium phosphate to form solid magnesium phosphate (Mg3(PO4)2) and aqueous potassium chloride (KCl). Indicate the physical states of the reactants and products
October 15, 2010

chemistry
Write a balanced chemical reaction to show the dissociation of solid magnesium chloride (MgCl2) in water, indicate states of the reactants and products
October 15, 2010

Probability - CHECK ANSWERS
Thanks a bunch!
October 15, 2010

Probability - CHECK ANSWERS
I have an eight pack of crayons. Colors red, green, blue, orange, black, gray, pink, and purple. What is the probability of choosing the green crayon? 12.5 percent What is the probability of choosing the red, blue, or gray crayon? 37.5 percent What is the probability of not ...
October 15, 2010

math
suppose both pairs of opposite sides of a quadrilateral are parallel. Which angles of the quadrilateral must be supplementary?
October 14, 2010

5th grade
What do you think 24*3.7 is ???
October 14, 2010

geography
What impact did the dissolution of the Union of Soviet Socialist Republics have?
October 13, 2010

math
Why is 24,005 greater than 8,999?
October 11, 2010

Physics
If i have ten grains of sand on a flat, 8x8 chessboard, randomly distributed, what is the probabilty that all ten are on the same square?
October 8, 2010

Physics
The sun has a raduis of 6.96*10^8m and a surface temperature of 5780K. How much power is radiating?
October 8, 2010

Physics
Consider 3 layers of a wall. The first layer is plaster 1.0 cm thick(R=0.033 SI units), the second layer is fiberglass insulation 8.9 cm thick (r=2.97), and the outside layer is woodd 3.0 cm thick(0.33). What is the heat loss through one square meter of wall if the inside ...
October 8, 2010

science
what reactants are added together to get copper nitrate!
October 8, 2010

word problem
Members of the Computer Club were assessed equal amounts to raise $1200 to buy some software. When 8 new members joined, the per-member assessment was reduced by $7.50. What was the new size of the club?
October 8, 2010

word problem
2. The excursion boat Holiday travels 35km upstream and then back again in 4h 48min. If the speed of the Holiday in still water is 15km/h, what is the speed of the current?
October 8, 2010

word problem
1. During 60mi of city driving, Jenna averaged 15mi/gal. She then drove 140mi on an expressway and averaged 25mi/gal for the entire 200mi. Find the average fuel consumption on the expressway.
October 8, 2010

Algebra 2
1. During 60mi of city driving, Jenna averaged 15mi/gal. She then drove 140mi on an expressway and averaged 25mi/gal for the entire 200mi. Find the average fuel consumption on the expressway. 2. The excursion boat Holiday travels 35km upstream and then back again in 4h 48min. ...
October 7, 2010

Home work for Gym
Thank You soo much!! ;D
October 7, 2010

Home work for Gym
To join a gym, your friend pays a one-time fee of $75 and $45 per month for the duration of the membership. Your friend has paid a total of $345. How long has your friend been a member of the gym? HELP ME1 :D
October 7, 2010

Math; Pre- Algebra
Please help me !! :0
October 7, 2010

Math; Pre- Algebra
Problem: -5k - 19 = 5 - 13k Solve for k. -15n = 16 = 86 - 29n Solve for n.
October 7, 2010

Math; Pre- Algebra
I neede help with how to solve equations with variabls on both sides. Can you give me some examples and work them out step by step?? Please!! :D
October 7, 2010

geometry
M is the midpont ST what is the reason?
October 7, 2010

medicine
The dermatologist is having you prepare a dog for a skin allergy test. Forty antigens need to be tested and each antigen must be 1 cm from the next. What size patch should you shave on the dog (assume that you are shaving a square)
October 7, 2010

algebra)
8 divided by 8 =1
October 5, 2010

social studies
what does bias mean?
October 5, 2010

physics
A .15kg ball is dropped from a height of 14 m to the ground below, and hits the ground with a speed of 12 m/s. With what speed would the ball have hit the ground if there were no air resistance? How much work does the air resistance do on the ball?
October 4, 2010

math
Put in simplest form: 16x^7y^12-10X^5y^8/2x^2y^9
October 4, 2010

Chemistry
Use de Broglie's relationship to determine the wavelength of carbon atom moving at 2.3 x 10^5 m/s.(Hint: First determine the mass in kg of one move of carbon atoms)
October 3, 2010

biology
k so the answer would b 22 degrees????
October 3, 2010

biology
the index of refraction of h2o is 1.33. find the angle of refraction of a beam of light in air hitting the h2o surface at an angle of 60 degrees n(air)=1.00
October 3, 2010

Organic Chemistry
Design a flowchart for the separation of a mixture that contains toluic acid, p-bromo-aniline, and anthracene. Whenever a reaction occurs, write the reaction completely.
October 3, 2010

Math
To find the x-intercept, let y=0 and solve for x. Therefore, 0=2x-1 ---> x=1/2 To find the y-intercept, let x=0 instead. y=2(0)-1 ---> y=-1 From here, you plot the points (1/2,0) and (0,-1) on the graph.
October 2, 2010

Chemistry
12545
September 29, 2010

read and write
Meaning: Without emotion; in a stoic manner
September 28, 2010

MATH
sorry for all the dots they werent nessary but thats how it shows in my math book
September 28, 2010

MATH
1 6x+7=25;3 2 22-5c=8;3 3 b\4-7=1;36 4 7a+4_>20;2.7 ps. the arrow is suppose to be on top of the line. 5 4y-3.12;4 6 m\3+14<33;9 I NEED THE ANSWERS PLEASE CAN ANYBODY HELP ME FAST .
September 28, 2010

math
thats my cousin keila and we both in 9th grade and need help but me and her have diffrent questions ?
September 28, 2010

MATH
huh?
September 28, 2010

math
the sum of 7 and three a number b is at least 12 ?
September 28, 2010

college chemistry
Please identify the net ionic equation for Na3PO4 +ZnSO4=Zn3(PO4)2+ Na2SO4
September 27, 2010

medicine
A cat with a gastrotomy tube must receive 300 kcal daily. A 15 oz can of food has 1500 kcal. The food must be diluted with water 50:50 so that it is thin enough to fit through the tube. A maximum amount of 45 ml can be given at each feeding. How many feedings does the cat need...
September 23, 2010

medicine
50 ml of a solution of 50% dextrose is added to a liter of 0.45% NaCl with 2.5% dextrose to yield a solution with a final dextrose concentration of what percent
September 23, 2010

Critical Reading
metaphore for obstacles
September 23, 2010

geometry
if ef=2x-19, fg=3x-16, and eg=25, find the values of x, EF, and FG
September 22, 2010

math
in music what does allegro mean?
September 22, 2010

algebra
Can you please explain how to solve this? How far an airplane would fly in 3h if its speed is 800km/h
September 21, 2010

Calculus
Determine how much time, to the nearest tenth of a year, is required for an investment to triple in value if interest is earned at the rate of 3.5% compounded continuously. (use A=Pe^rt
September 20, 2010

medicine
A 8 lb rabbit needs 300ug/kg of a 1% solution. How many ml should be given
September 20, 2010

medicine
A small bird needs 100mg/kg of antibiotic IM. The bird weighs 80g and the concentration of antibiotic is 100mg/ml. How many ml need to be given
September 20, 2010

medicine
The concentration of Lasix is 5%. How many milligrams are in 0.5ml?
September 20, 2010

medicine
A cat on IV fluids must receive 30ml/hr of saline. The drip set provides 60gtt/ml. How many gtt/sec should the drip be?
September 20, 2010

medicine
I don't know it never said in the problem.
September 18, 2010

medicine
How many ml of 50% dextrose should be added to 1 L of 0.9% NaCl to make a 5% dextrose solution?
September 18, 2010

math
How many ml of 50% dextrose should be added to 1 L of 0.9% NaCl to make a 5% dextrose solution?
September 18, 2010

Math
How many ml of 50% dextrose should be added to 1 L of 0.9% NaCl to make a 5% dextrose solution?
September 18, 2010

Algebra 2
Can you help me set these up? 1.When 0.5cm was planed off each of the six faces of a wooden cube, its volume decreased by 169cm^3. Find its new volume. 2. The width, length, and diagonal of a rectangle are consecutive even integers. Find the integers
September 16, 2010

Algebra 2
The hypotenuse of a right triangle is 25m long. The length of one leg is 10m less than twice the other. Find the length of each leg. Can you tell me how to set this up? I can do the math from there.
September 16, 2010

Algebra 2
how do i factor: (p+q)^3 - (p-q)^3
September 16, 2010

we the people
For my homework i was given this: find an example when each of the 3 branches of the national government has checked one of the other 2. i cant find anything on the internet
September 12, 2010

Geometry
211
September 11, 2010

algebra
(2-x)/(2x+6)+ x/(x^2-9) Can some one please help solve this one because I stuck? I don't know how to sole this, so please somebody help!!
September 11, 2010

8th grade Math
how do you convert .833333333333....... into a fraction
September 9, 2010

Economics
The role of an assumption in an economic theory is to: a. add realism b. prove the theory c. cover special cases d. simplify the theory
September 8, 2010

algebra
on one day the value of $1.00 was equal to 0.77 euro or $1.24 Canadian. Write a function to represent the value of Canadian dollars in euros. What is the value of th efunctoin for an input of 5 rounded to the nearest cent, and what does it represent
September 8, 2010

Algebra II/ Pre Calc
ln(12+x)= It is not (ln 12)(ln x) or (ln12x)
September 6, 2010

algebra
(a minus sqrtx)^2=25 I have no idea of how to work this problem where i in up with the answers of a=7,-3. Basiclly I just gave it a guess. Could someone show the steps I need to take. Thanks.
September 5, 2010

algebra
1/x^2+5/x=4 Can someone please help me with this problem by showing the steps that I would have to do to get the answer? I have no idea how to do this. Please help somebody.
September 4, 2010

algebra
(5/x)+1=9-x
September 4, 2010

algebra
I don't understand how to do this, so please help. Could you show the steps , so I can try it own my ow to see if I can get it.Thank you. 2SQRT4t^9z^2.
September 3, 2010

algebra homework
2sqrt x+1-1=6-x I really need some help because I am so lost,so can someone please help me?
September 2, 2010

Geometry
Suppose B is the midpoint of AC. AB = 5x and BC = 3x + 4. Find AB.
August 31, 2010

Algebra 2
A photocopying machine purchased new for $4500 loses $900 in value a each year. a. Find the book value of the machine after 18 months. b. When will the book value be $1200? Assume that each situation can be decribed as a linear equation HELP!!! I don't know how to set this...
August 31, 2010

History
what commercial arrangements did american shippers and traders want after the war had ended?why did they feel that this was needed, & how successful were they in accomplishing thier aims?
August 30, 2010

Algebra 2
Let f(x)=x^2 - 1 and g(x)=1 - 2x. Find the indicated values. 1. g(1/f(3)) 2. f(x + h) - f(x) all over h
August 29, 2010

math
x/3+2=x/6 In solving this problem do I divide 3 from both sides are what. I am a bit lost. please show me the steps so I can see if I am right or wrong in my calculations. Thanks you in advance.
August 27, 2010

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