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August 1, 2015

Posts by zoe


Total # Posts: 245

algebra
what is the answer of 7h+2w-9h-8w
September 23, 2012

social studies
ethnic group
September 10, 2012

college physics
Answer pls
August 18, 2012

chem
.144
May 15, 2012

Math
A student wants to display the average monthly temperatre for one year.He chooses a line graph to display the data.Describe and correct the error made in choosing that type of display for the data.
March 29, 2012

Math
Which sample is more likely to be biased? Should big bend state park restrict the number of campers allowed on the grounds? a.70 randomly selected visitors to Big Bend State Park b.70 randomly selected campers at Yosemite National Park
March 27, 2012

Math
Should the city build a homeless shelter downtown?Which sample is more likely to be biased? a.60 randomly selected downtown resturant customers b.60 randomly selected people at the post office
March 27, 2012

Math-Corrections
I'm not sure ,but now i got the answer no because she(the librarian)cant prove that the kids will not like the new encyclopedia.
March 27, 2012

Math-Corrections
Based on the survey,the librarian predicts that about two-thirds of the students in seventh grade will not like the new encyclopedia.Is this answer reasonable? Answer i got:yes
March 27, 2012

meanings
Musical?
March 27, 2012

Chemistry
What is the complete chemical equation? Al(s) + Cu(CH3COO)2(aq) -> ?
March 18, 2012

Math help quickly
Use the expressions for left and right sums and the table below. right-hand sum = summation (n above and i =1 on the bottom) f(ti) * change in t = f(t1) * change in t + f(t2) * change in t + .... + f (tn) * change in t left-hand sum = summation (n above and i = 0 on the bottom...
March 13, 2012

Calculus need help badllyyy!
Use the expressions for left and right sums and the table below. right-hand sum = summation (n above and i =1 on the bottom) f(ti) * change in t = f(t1) * change in t + f(t2) * change in t + .... + f (tn) * change in t left-hand sum = summation (n above and i = 0 on the bottom...
March 13, 2012

4th grade math
what is 5/6 of 288
March 12, 2012

4th grade math
what is 5/6 of 288
March 12, 2012

Chemistry
What is the magnitude of the energy change associated with the emission of one mole of photons of light* with this wavelength? light*= 6.231×1014 Hz
March 3, 2012

MATH
2+2+1+1=6cm2
February 29, 2012

Chemistry
Determine the partial pressure of oxygen necessary to form an aqueous solution that is 7.7 x 10-4 M O2 at 25oC. The Henry's Law Constant for oxygen in water at 25oC is 1.3 x 10-3 M/atm
February 7, 2012

Chemistry
Find the product for the equation and then write a balanced equation. Cl2 + FeBr3 -> ?
January 15, 2012

chemistry
I need to convert a word problem that I was given into a balanced chemical equation and cannot figure out how i was type it. The problem is: Nitrogen and hydrogen gases react at extreme temperatures and pressures. Any help?
January 8, 2012

math
Puck is making a scale model of an airplane. The actual airplane is 98 feet long. The scale of the model is 1 cm : 4.7 ft. What is the length of the model? [Round to the nearest hundredth, if necessary.]
January 4, 2012

Chemistry
In respect to covalent bonding, what does it mean if there's an unshared or lone pair of electrons?
December 31, 2011

Science
A circular hatch in the hull of a submarine has a radius of 40.0 cm. The submarine is 850.0 m under water. If atmospheric pressure above the ocean is 1.01 x 105 Pa and the air pressure inside the submarine is 1.31x 105 Pa, what net force is exerted on the hatch? (ρsw = ...
December 19, 2011

chemistry
A gaseous mixture containing 5 moles of H2 and 7 moles of Br2 reacts to form HBr. Write a balanced chemical equation. Which reactant is limiting? What is the theoretical yield in moles? What is the theoretical yield for this reaction in grams? How many moles of excess reactant...
December 4, 2011

calculus
i'm not sure how to do this. can someone help, please? thanks! consider the function f(x0 = x^2 + 2x on the interval [-2, 2] a. draw a sketch of the graph of f(x). find the average rate of change on the interval [-2, 2] and sketch this secant line. b. find an expression ...
November 27, 2011

English
essay "peace and stability in a globalized world" I need some help. Thanks
November 25, 2011

Math
Typing error fing meaning find
November 15, 2011

Math
How do I fing volume of a shape?
November 15, 2011

calculus
let f(t) = 2*pi*t + sin(2*pi*t) a) find value of t in open interval (0,2) for which the tangent line at (t, f(t)) is parallel to the line through (0,0( and (2, 4pi) b) suppose the given funtion describes the position of a particle on the x-axis for 0<= t <= 2. What is ...
November 1, 2011

calculus
find the centroid of the plane region bounded by the curves y = cos x, y=sinx, x=0,
October 31, 2011

English
I need to know what just means in the following Sentance . Do you think this is just Please help even my mom is blank Tx
October 28, 2011

pre algebra with pizzazz 239
X+y=2
October 27, 2011

English
I'm blank on this question From the verbs listed write a noun ending in ion Divide Explode. Collide Confess. Invade. Rotate Comprehend. Deflect I don't need all the answers I just need to know what it means Thanks
October 27, 2011

Non verbal reasoning age 9-10
I really hate nvr it's horrible. I'm English so we have to do this I don't know if any Americans do it but I still hate it. For anyone who docent know what it is, it's basically pictures that mean something , but get changed ur ment to circle the answer . Any ...
October 27, 2011

Fourth grade math
Tx fo helping
October 27, 2011

Fourth grade math
What's range mean?
October 27, 2011

English
For our homework we had to draw and label an imaginary creature, then write an essay on it . I'm completely stuck on the essay bit please he
October 27, 2011

English
What word is wrong in this sentence ? Darren wusai and I is a good team. Please help I need this in in about six hours time!
October 27, 2011

English
Wow ! I thought it wasn't that simple as of being an opposite thanks I'm saved!
October 27, 2011

English
Really stuck on English homework.ahhhh! What is an antonym for the following words? Subtract Extend Spectator Least Confident Exterior Please, help despretly needed by Monday !
October 27, 2011

english
I'm not sue but I would put who because it's a simpler word
October 26, 2011

English check my answer
I'd just say I'm really bad at grammar and tell your teacher , can I have some extra help please? Sweet talking into thinking you love English always works
October 26, 2011

Social Studes
Hhhhhheeeeeellllllppppppppp mmmmmmeeeeeee oooooooonnnnnnn this
October 18, 2011

Math
I am a number with the same number of tens as ones. The sum of my digits is less than 5. Is am a number greater than 15. What number am i?
September 29, 2011

4th grade Math Help
hi, what is the least possible number, when rounded will become 1,000,000? would it be 999,999?
September 19, 2011

calculus
fin derivative of the function (t+e^t)(4- sqrt t)
June 26, 2011

calculus
differentiate the following funcation: R(t) = (t + e^t)(4- sqrt (t))
June 26, 2011

calculus
f(x)= (4x^2+5)/(3-2x) find derivative using limit
June 23, 2011

calculus
given the function f(x) = { x^2+2 if X<=2, 3 if x=2 and 4-x if x>= 2 -> graph f(x)
June 22, 2011

math
how do you do 16n-9 with the specials
May 16, 2011

Physics
A projectile is launched beneath the straight line path it would follow if there was no gravity. How many metres does it fall below the line if it has been travelling for 1 second? 2 seconds?
May 14, 2011

Calculus
Write the logarithm of a single quantity: 2ln(x)+ln(4)-(1/2)ln(9)
April 6, 2011

math (plz help)
1. 46 seats...... 30+4+4+4+4 2. No the 8th row has 62 seats and the 7th row has 58 (30+4+4+4+4+4+4+4+4) 3.THeater B has 145 seats.... (40+25 4's) hope that helped
March 14, 2011

chemistry.
i've tried to di it. 1)Na2CO3 + HCl---> NaCl+NaHCO3 2)Basic as Na2CO3 is a base and amount of HCl =0 3)NaHCO3+HCl--->NaCl+CO2+H2O 4)phenolphthalein for eq pint point 1 as it will indicate change in basicity and methyl orange for secong equivalnce point as it will ...
March 13, 2011

chemistry.
in the titration between Na2CO3 and HCl... 1) at the first end point what reaction is stoiciometrically complete? 2)At the start of titration where HCl=0 is the solution acidic or basic. ExPlain? 3) At the 2nd end point what reaction is stiociometrically complete? 4)Propose a ...
March 13, 2011

chemistry urgent
Draw major product of substitution reaction of (2R,3S)2-bromo-3-methylpentane with CH3CH2O- nucleophile
March 7, 2011

Organic chemistry
Draw major product of substitution reaction of (2R,3S)2-bromo-3-methylpentane with CH3CH2O- nucleophile?
March 6, 2011

science
anyone gonna help?
February 13, 2011

science
I'm in 5th grade and I need a cool, unusual science fair project. I have 3 days to do this. It has to be a question with a variable, not a demonstration. HELP!
February 13, 2011

banyan elementary
7x12=84
January 19, 2011

space
How many socks would it take to fill the space shuttle
January 9, 2011

biology
21% of a population is homozygous dominant, 49% are heterozygous and 29% are homozygous recessive. if the Hardy-Weinberg Law applies, what percentage of the next generation is predicted to be homozygous recessive?
January 4, 2011

math
How do you find the unit rate for this? The managerof Quality Dairy stores says it takes 1000 pounds of milk to make 100 pounds of cheddar cheese. Find a unit rate relating pounds of milk (m) to pounds of cheese (c). 1000 pounds of milk per 100 pounds of cheese.
November 29, 2010

math
find the values of x and y that solve the system of equations -3 x- 8y=19 4x+9y=-22
November 29, 2010

5th grade
adverb?
November 19, 2010

physics
crate weighs 823 N rests on plank that makes a 25 degree angle with the ground. Find components of crate's weight parallel and perpendicular to the plank
November 18, 2010

Math
1. -3/4*-(1 5/6)*(-7/4)= 2. -3/4*(-1 5/6)*7/4= 3. -3/4*(-1 5/6)*(-7/4)*(-2 3/8)= 4. 3/4*(- 5/6)*7/4*(-2 3/8)= 5. 3/4*1 5/6*7/4*(-2 3/8)=
October 25, 2010

Math
Info Sean is buying a new DVD player for 315. the store offers him an interest-free payment plan that allows him to pay in monthly installments of $25. Ques. Use n to stand for number of payments and a for the amount still owed. Write an equation for calculating a for any ...
September 21, 2010

Human services
what are the pros and cons of placing children of color in a causian home?
May 10, 2010

chemistry
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010

Economics
Quality Adjusted Life Years evaluates interventions in _____ rather than _____. a. dollars; years b. utility; dollars c. years; dollars d. dollars; utility
April 19, 2010

Chemistry
Ammonium carbonate decomposes upon heating according to the following balanced equation: (NH4)2CO3(s)-->2 NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 25 C and 1.07atm by the complete decomposition of 11.86 g of ammonium carbonate.
April 16, 2010

Chemistry
Ammonium carbonate decomposes upon heating according to the following balanced equation: (NH4)2CO3(s)-->2 NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 25 C and 1.07atm by the complete decomposition of 11.86 g of ammonium carbonate.
April 16, 2010

Chemistry
oh i think you have to convert the mm Hg to atm first
April 16, 2010

Chemistry
dont you just multiply .038 times the total pressure?
April 16, 2010

Chemistry
okay yeah i got it. thanks its 736 mmhg
April 16, 2010

Chemistry
how do i know the water vapor pressure at 25C though?
April 16, 2010

Chemistry
The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 C and a total pressure of 760 torr . what is the partial pressure of the gas?
April 16, 2010

Advanced 6th grade Math
i still dont get it
April 12, 2010

Advanced 6th grade Math
What is the sample space of expiremental probibility
April 12, 2010

art 101
it is a
April 12, 2010

6th Grade Grammar
yeah definitly a
March 17, 2010

CRT205
(I did not get some answers correct on this categorizing fallacies assignment. It was graded but not with the correct answers. Can someone help me by telling me which type of fallacies the below statements are please so I can understand better. Thank you!) 1.My friend, who ...
March 8, 2010

2nd grade
Why is it helpful for scientists to know how long animals can live?
March 1, 2010

Molecular biology
What is the importance of the tertiary structure of a tRNA? I know the structure, but I'm not sure what is the importance of it. Is it stabilization?
February 24, 2010

Algebra
2(x+5)/(x+5)(x-2) = 3(x-2)/(x-2)(x+5) + 10/(x+5)(x-2) I know I have to get 2(x+5) = 3(x-2) but I don't know the intermediate steps. I tried canceling out to get 2/(x-2) = 3 + 10 / (x+5) and gross multiplying but that wouldn't make sense.
February 24, 2010

Physics
Oh picture looks like this 4q----a----q | | | | a a | | | | 5q----a----5q
February 1, 2010

Physics
Four charged particles are at the corners of a square of side a, as shown in the figure below. (A = 4, B = 5, C = 5.) (a) Determine the magnitude and direction of the electric field at the location of charge q. (Use k_e for the Coulomb constant and q and a as necessary.) ...
February 1, 2010

Physics
A proton accelerates from rest in a uniform electric field of 620 N/C. At one later moment, its speed is 1.30 Mm/s (nonrelativistic because v is much less than the speed of light). (a) Find the acceleration of the proton. m/s2 (b) Over what time interval does the proton reach ...
February 1, 2010

Biology
I don't understand how to do this at all!! I've been Googling the past hour and I just don't get it. My teacher won't respond and my exam is tomorrow. I get that we cleave with an acid and then we can do amino acid analysis. The entire protein can be pieced ...
January 27, 2010

home economics
name two macronutrients and two micronutrients
January 14, 2010

Physics
By what factor would you have to decrease the tension in a stretched string in order to decrease the wave speed by a factor of 3.5? I know that v = sqrt(T/u) but am confused as to what to do?
January 11, 2010

Physics
A particle executes simple harmonic motion with an amplitude of 9.00 cm. At what positions does its speed equal two thirds of its maximum speed? I got: v2 +ω^2x^2 =ω^2A^2 vmax =ω A and v = ωA/2?
January 4, 2010

Physics
A particle executes simple harmonic motion with an amplitude of 9.00 cm. At what positions does its speed equal two thirds of its maximum speed?
January 4, 2010

Health Care Reimbursement Methodologies
Your hospital has just received a reimbursement rejection from the fiscal intermediary for two outpatient procedures that were performed on the same day. This rejection was probably generated by
October 22, 2009

Physics
The water in a river flows uniformly at a constant speed of 2.53 m/s between parallel banks 69.8 m apart. You are to deliver a package directly across the river, but you can swim only at 1.74 m/s. (a) If you choose to minimize the time you spend in the water, in what direction...
October 12, 2009

Physics
The water in a river flows uniformly at a constant speed of 2.53 m/s between parallel banks 69.8 m apart. You are to deliver a package directly across the river, but you can swim only at 1.74 m/s. (a) If you choose to minimize the time you spend in the water, in what direction...
October 12, 2009

tourism
What's the difference between a marketing consortia and a hotel refferal system?
October 10, 2009

math
Hi, I wrote the first one wrong... The hawks won 17 more hockey games than they lost. They played 52 games in all and had 3 ties. How many games did they lose? This is what I did so far... 52 games ...-17 ------ 35 okay now there is 3 ties??? so they had 35 games left.. is ...
October 8, 2009

math
The hawks won 17 hockey games than they lost. They played 52 games in all and had a 3 ties. how many games did they lose? so 52 ..... games in all won 17......games ties.........3 this is what I do 52 - 17 ------ 35 so they had 35 games left. From here I am stuck DO I ADD 3 ...
October 8, 2009

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