# Posts by zoe

Total # Posts: 306

**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*

**Algebra**

$48 per night $8 per meal

*April 5, 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 don't 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*

**4th grade math**

36666

*October 24, 2009*

**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*

**Physics**

C.) What is her average velocity over the entire trip? I was wondering how it is that we find out the velocity? I know that velocity would be change in X/change in time, but for the way the problem was set up, I'm not sure how to go about solving it.

*October 8, 2009*

**Physics**

A person walks first at a constant speed of 4.70 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 2.80 m/s. (a) What is her average speed over the entire trip? (b) What is her average velocity over the entire ...

*October 8, 2009*

**Physics**

I got close! I tried to solve it and cancelled things out, to which I got A=0, B=1, but I can't seem to get C right. I thought C would = 0, but apparently that's wrong. Any clues as to where it went bad?

*October 4, 2009*

**Physics**

Your answer from part b is rate = ??m3/s ??m3/sec x sec = m3 Solve for sec. Then convert sec to hours. sec x (1 min/60 sec) x (1 hr/60 min) = ?? --------------- So I have the rate 4.73e-4 m3/s. I'm not sure how the cancellation for the m3 to disappear, but I get the ...

*October 4, 2009*

**Physics**

Assume it takes 6.00 minutes to fill a 45.0 gal gasoline tank. (1 U.S. gal = 231 in.3) I don't know how to solve for part C. (a) Calculate the rate at which the tank is filled in gallons per second. ANSWER: 0.125 (b) Calculate the rate at which the tank is filled in cubic ...

*October 4, 2009*

**physics**

A surveyor measures the distance across a straight river by the following method. Starting directly across from a tree on the opposite bank, she walks 90 m along the riverbank to establish a baseline. Then she sights across to the tree. The angle from her baseline to the tree ...

*October 4, 2009*

**computers**

in which program does the default show you the hierarchy of drives, folders, and files in a split window

*July 9, 2009*

**Finite Math**

Thanks Reiny!!!

*February 24, 2009*

**Finite Math**

A "hand" consists of a set of 5 cards selected from an ordinary deck of 52 cards: (1) How many different hands contain exactly 4 diamonds? = 27885 (2) How many different hands contain exactly 4 cards of the same suit (any of the four suits)? (3) How many different ...

*February 24, 2009*

**math**

The answer is 92. Anyone have idea how to solve this or why the answer is 92? Thanks in advance!

*February 21, 2009*

**math**

Three coins are selected from 10 coins: 4 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents? I know that the total outcomes equals 120, but how do I find how many of these have the value of...

*February 21, 2009*

**Social Studies**

hi! cultural diffusion is when two groups come together to make new ideas like if two districs come together to plan new ideas like a spread or school board meeting for good new ideas

*January 30, 2009*

**world geography**

what factors account for the simmilarities and differences between the subdivisions in tropical climate zones?

*January 21, 2009*

**4th grade science**

What is the cause of ecosystem for a hawk

*January 14, 2009*

**japanese :)**

Dear SraJMcGin, Can you let me know where to translate English to Kanji Yours Truly Zoe

*November 8, 2008*

**physics**

mass of cart (velocity of cart) + mass of car(velocity of car) = (total mass)velocity solve for "velocity"

*October 14, 2008*

**re -same question again**

sorry to post this question again but i am having trouble finding evidence of what jesus did not do . i don`t really understand the question like i mentioned in my last post does it mean that he did not get married or have children . i can`t find anything i can print off. i ...

*September 24, 2008*

**year 8 re**

i need to find 3 pieces of evidence of what jesus did and 3 things what jesus didn`t do. for the 3 things jesus did i have found feeding the 5000 , walking on water and healing the sick but i am having trouble finding evidence for what jesus did not do. does it mean not ...

*September 23, 2008*

**ict**

please could someone help i need to give 4 answers . what is needed to access the internet? thanks

*September 15, 2008*

**music**

can you tell me where to find free music notes for guitar and paino, thx.

*September 10, 2008*

**COM220**

Do you think Eliminating Negative Thinking is a controversial, supportable and sound topic for a research paper?

*July 2, 2008*

**COM220**

Thanks for everything

*June 28, 2008*

**COM220**

The things I mention to Sue about what I want to research about changing your thinking is to much. I will follow GuruBlue's suggestions. I just want to know am I going in the right direction with this topic.

*June 28, 2008*

**COM220**

The paper is just 2,000-2,500 words.

*June 28, 2008*

**COM220**

Thanks for your suggestion.

*June 28, 2008*

**COM220**

I have no idea on how i intend to research this topic. I want to challenge myself in finding information in this matter. What i mean by the topic of choice is how to overcome frustration, ways to communication effectively,dispute negative thinking and to recongnizing fautlty ...

*June 28, 2008*

**COM220**

Is this a good topic for a reserach paper? How to change your thinking? If not could you give some advice in this direction, Thanks

*June 28, 2008*

**Psychology**

Thanks! I will revise it

*May 7, 2008*

**Psychology**

Change your thinking(Title of my reseach paper) How do I plan to support my thesis with compelling arguments and counterarguments. My thesis statement is," Even though we experince situation that demonstrate this simple principle- the way we think determines the we feel&...

*May 7, 2008*

**3rd grade math**

6.7

*April 29, 2008*

**design technology**

i`m finding it hard to find the answers to these questions for my homework . i know these questions have been asked before but i can`t find the answers from the websites people have been kind enough to find. Why is wool warmer than silk? why is silk stronger than wool? why is ...

*April 13, 2008*

**spanish**

I need to describe my spring break in Spanish day by day. I think she said present-tense, I copied this chart off the board. AR Yo e Nos amos ER Yo e Nos imos-emos Is that present? So my question is, in that tense, how would I say "I go"?

*April 7, 2008*

**ap physics**

I need some help with the following problems. I got no idea how to do it...PLEASE HELP!!!!THANKS A LOT!! A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. He fires a gun and , after...

*March 22, 2008*

**Algebra**

3brothers 4sisters

*January 18, 2008*

**language**

How can you tell a valid opinion from a bias opinion? I realize when they are obviously slanted, but what makes an opinion valid?

*January 13, 2008*

**History**

Was Venice, Italy always flooded by water? Was it made on-top of the ocean, or was it made, and later flooded?

*October 13, 2007*

**science**

what are the major abiotic and biotic factors in a coniferous forest?

*October 9, 2007*

**science**

infinte use to find math two words seventenn letters for crossword puzzle

*August 21, 2007*

**Math**

How do you write equations for perpendicular lines? I will assume you know how to find the equation of a line if you know the slope and a point on that line. The key thing to remember is: Two perpendicular lines have slopes that are opposite reciprocals of each other. e.g if ...

*July 22, 2007*

**Chemistry**

700 liter of N

*July 9, 2007*

**Chemistry**

7.0*102 l n

*July 9, 2007*