Saturday

December 20, 2014

December 20, 2014

Total # Posts: 1,558

**math (probability)**

3/25
*September 22, 2007*

**world civ.**

yes
*September 10, 2007*

**reading**

Chucha says that Anita will fly like a butterfly.What do you think she means?Can you explain in a short answer please.
*September 5, 2007*

**ecology**

Thank you for your help. I worked out most of it. However I am still unsure of: a) why should we collect data from the 2 specific areas (exposed and sheltered) and not from the whole area?? b) which method is better: transects or sampling and why? I can't find the answer ...
*September 3, 2007*

**ecology**

I am asked for some suggestions for investigating the distribution of limpets. There are 2 areas to be considered 'sheltered' and 'exposed' and these may be good places to carry out the investigation. They are particularly interested in the relative frequencies...
*September 3, 2007*

**Math117**

how to do negative decimal exponets 2^-0.4545 Remember that a negative power is the same as the reciprocal... 2-b = 1/2b So you can compute the positive power, then take the reciprocal of the result. Yes but that works with decimal of course, use your calculator. square root ...
*June 28, 2007*

**Liberal Arts Math**

show work simplify:(a-9b)(a+3c) (a-9b)(a+3c) a^2+3ca-9ba-9bc I'm pretty sure this is how you do it... plz check some standard formula to remember are; i: (a+b)^2=(a+b)(a+b)= a^2+2ab+b^2 ii: (a-b)^2=(a-b)(a-b)=a^2-2ab-b^2 iii: (a+b)(a-b)= a^2-b^2 look at the patern and work...
*May 10, 2007*

**Liberal Arts Math**

factor the polynomial completely: 2xy-3y-40x+60 2xy-40x-3y+60 2x(y-20)-3(y-20) (2x-3)(y-20)
*May 10, 2007*

**Liberal Arts Math**

how would i solve this problem?? it says factor the polynomial completely: 2xy-3y-40x+60 I studied polynomials, but I don't know what it means to factor them. Do you have a definition in your textbook or notes or something? B-cuz then I'll be able to help you. ~brie...
*May 10, 2007*

**CALC**

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius and interval of convergence... so far i am guessing that radius is equal to x and interval of convergence is (-infinty to positive infinity) is that correct? You need to do a ratio ...
*May 7, 2007*

**CALC**

i still need help on this...integrate (-2)/(xln^4(x) dx...should i be using substitution ...if yes then wut should i substitute? plz help me..thanks in advanced! at is wrong with u= 1/x and dv= dx/ln^4(x) ? remember d/dx (lnx)^-n= (-n/x)*lnx)^(n-1) okey thank you...i got it now
*May 7, 2007*

**calculus-integration**

integrate -2/xln^4(x)...plz help me..give me an idea on how to start..plz The derivative of the ln(x) function is 1/x and this is multiplying the ln^4(x). You can thus write the integral as: -2 * 1/5 ln^5(x) + constant. is that the answer? wut about the x infront of ln^(x)......
*May 7, 2007*

**Calculus**

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius i am guessing the radius is either x or x/2 but i am still not sure..CAN someone help me plz? PLZ HELP ME...i dont know where to start Take the ratio of two succesive terms and take ...
*May 7, 2007*

**calculus-integration!**

should i use substitution?? if yes how should should i use it? plz i need some directions? k plz someone?...so far i used trig. substitution. i got a=8, so i used x=asin(è)so according to this substitution i got x=8sin(è) and dx=8cos(è) dè...then i ...
*May 6, 2007*

**Calculus**

yes! tnk u ok? It's actually (x->0.) Find the limit of cot(x)-csc(x) as x approached 0? Lim [cot(x) - csc (x)] ..x->0 = Lim [(cos x -1)/sin x] ..x->0 Use L'Hopital's rule and take the ratio of the derivatives: Lim (-sin x/cos x) = 0 x->0 thank you very ...
*May 6, 2007*

**Algebra 2: Radicals URGENT!!**

Could some kind, saintly soul help me solve this problem? Simplify: 8w sqrt(48w^5) - x^2 sqrt(3xw^2) . . =8w(√16)(√3)(√w^4)(√w) - x^2(√3)(√x)(√w^2) =32w^3(√3w) - wx^2(√3x) not much of a "simplification" really 8w ...
*April 27, 2007*

**education**

What does I a SWAA stand for? It is a brain teaser. http://www.google.com/search?client=opera&rls=en&q=SWAA&sourceid=opera&ie=utf-8&oe=utf-8
*April 19, 2007*

**chem**

1.37 g
*April 9, 2007*

**math 11 princapls**

t+3/2-4/2t=0
*March 28, 2007*

**Data Management Systems**

A stationary business is interested in starting a Web site for their Stationary shop, so their existing customers can submit stationary and custom orders online. They want this Web site to help them reach new customers. What type of database management system, if any, should ...
*March 26, 2007*

**IT Information Systems Technology**

Why are database management systems important in the business community? Give atleast two reasons. Let's begin with what a database is. A database is a collection of data records. These records are on your computer and a program is used to access the records, change the ...
*March 26, 2007*

**Chemistry**

Ok I think I figured this out but im not sure if its right please help. Thanks(= Determine the oxidation number for nitrogen in each of the following a)NH3 = -3 b)NO2-1 = 2 c)N2= 2 d)NO2Cl= 2 e)N2H4= 2 The first one is right. All must add to zero for a compound OR to the ionic...
*March 20, 2007*

**science**

what are the different parts toa lunar probe???? Thank you for using the Jiskha Homework Help Forum. Here is what the Wikipedia has to say about lunar probes: http://en.wikipedia.org/wiki/Chang'e_program
*March 18, 2007*

**Calculus**

Hello, I'm having trouble with this exercise. Can you help me? Integral of (x* (csc x)^2)dx I'm using the uv - integral v du formula. I tried with u= (csc x)^2 and used some trigonometric formulas, but the expression became too complicated, I couldn't continue ...
*March 15, 2007*

**math question**

Yea idk srry
*March 13, 2007*

**Algebra**

can you show me the steps for this problem (2x)to the 4th power (3xcubed)squared I'd like to help you, but I'm not sure what this problem is supposed to be. You can use the symbol ^ when using exponents. For example, 2x to the 4th power can be typed 2x^4. Perhaps you ...
*March 7, 2007*

**algebra**

Can someone help me with this problem please? rationalize the denominator and simlify the answer: 5/2 + the square root of 3 Do you mean 5/(2 + sqrt 3) ? What you wrote could also be interpreted as 2.5 + sqrt 3. You need to be more careful to use parentheses when necessary to ...
*March 1, 2007*

**IT**

Why is the waterfall model valuable in the management of information technology projects? Refer to "Arguments for the Waterfall Model" in http://en.wikipedia.org/wiki/Waterfall_model The waterfall model is a sequential software development model (a process for the ...
*February 28, 2007*

**Chemistry**

Can someone explain in easier terms the spontaneous process, entropy, and free energy. The textbook is hard to understand. Just a simple explanation. Thanks. Appreciate it! Free energy is the amount of energy that can be released in a chemical reaction. If free energy is ...
*February 8, 2007*

**matth pre-ap**

when you have problem like 1 inch =12 miles and then it says what does 2 /12 = how do you solve the problem
*February 6, 2007*

**find the volumes**

a box is 24 inches long,16 inches wide,and 10 inches deep.to two decimal places,how many quarts of watermelon seed are needed to fill the box? How many seeds are in a quart?
*February 1, 2007*

**ethnicity**

United States main stream culture
*January 24, 2007*

**chemistry**

LOSE ONE ELECTRON
*January 20, 2007*

**algebra2**

1/3 - 5/6 = 1/X SOLVE 1/3 - 5/6 = 1/X Let's remove the denominators by multiplying by 12X 12X*(1/3) - 12X*(5/6) = 12X*(1/X) Clear the fractions. 4X - 10X = 12 -6X=12 multipy by -1 6X=-12 Divide both sides by 6 6X/6 = -12/6 X = -2 Check my work.
*January 16, 2007*

**physics.. important stuff !**

i still do not understand?? can someone please help me out??? (a) why is the centripetal force neede to keep a body moving in a circular path? (b) In what direction does a centripetal force accelerate the body on whic it acts?? (c) Upon what threee factors does the centripetal...
*January 15, 2007*

**physics - so important**

In which of these cases is a youngster doing work in the school gymnasium? climbing up a rope lifting a set of weights from the floor to overhead PLEASE HELP ME? i NEED TO KNOW THiS FOR A TEST TOMORROW iN PHYSiCS & i CANT SEEM TO FiND THE ANSWER ANYWHERE & i HAVE SO MANY ...
*January 15, 2007*

**physics**

In which of these cases is a youngster doing work in the school gymnasium? 1. climbing up a rope 2. hanging motionless from a chinning bar. 3. lifting a set of weights from the floor to overhead WHICH ONE & WHY? A BRIEF EXPLANATION WOULD BE NICE. thank you all =] I will be ...
*January 14, 2007*

**Math**

(3/4 : 4/5)x 4/6
*January 11, 2007*

**French Essay, Needs Correcting Please**

Parles-moi de toi! J’e m'appelle Sarah et j’'ai trieze ans; mon anniversaire est le dix-sept Avril, alors je suis belier. J’'ai habite a Manchester quand j’'avais trois ans, mais maintenant j’'habite a Hattersley. J’'ai ...
*January 8, 2007*

**the big idea of energy**

lol i have already done jorney of a cheese sadwich and ear defenders now im doing the reaction between iron and sulphur
*December 5, 2006*

**Math**

Write an equation for the problem. And solve it. Sierra caught 3 times as many fish as Lily. They caught a total of 20 fish. 3x*2=20 ---is this right? if it is plz help me solve it thanks u You can say 3n+n=20 n= lily's fish.
*November 24, 2006*

**microeconomics**

what does ecomomics mean? Economics is a social science that studies the production, distribution, and consumption of goods and services.
*November 20, 2006*

** Life Science**

Please verify that the type of transport that supplies a cell with glucose is active transport, or is it another type of transport? I know that Binary Fission and Mitosis are similar becuse they produce new cells, how are they different? If Cytokinesis occured without mitosis ...
*November 5, 2006*

**Science**

Please verify that the tyupe of transport that supplies a cell with glucose is active transport, or is it another type of transport?
*November 5, 2006*

**chem**

Was Mercury the first superconductor? No. http://www.jiskha.com/display.cgi?id=1161728962 see what happened in 1962 Thanks for your answer. Would you please let me know if steel is a superconductor? never mind, it is not.
*October 24, 2006*

**calc**

Where do I start to prove this identity: sinx/cosx= 1-cos2x/sin2x please help!! Hint: Fractions are evil. Get rid of them. Well, cos2x = cos2x - sin2x, so 1-coscx = 1 - cos2x - sin2x = 1 - cos2x + sin2x You should be able to simplify this to 2*something squared. The ...
*October 21, 2006*

**chem**

1. Calculate the heat (calories) produced by the solution of 3.75 g of NaOH Hint: Remember that the reaction is exothermic. 2. Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved. (Î”HsolnNaOH) For #1. delta H(...
*October 19, 2006*

**chem**

determine the correct molecular shapes of XeF4, GeF4, and SeF4 (Broken Link Removed)
*October 5, 2006*

**chem**

Using electronegativity arguments, classify the following diatomic molecules as nonpolar (N), polar (P), or ionic (I), and enter five letters in order (e.g. NPNPI, INPNP, etc) : NaF, HF, NaH, CaO, and F2. Look up electronegativity (EN)of each element and subtract to obtain a ...
*October 5, 2006*

**physics**

A runner, beginning at rest, completed a 50 m run with a final speed of 6 m/s. Assuming constant acceleration. a) What was the average speed of the runner? b) What was the runner's time? c) What was the acceleration? a) half the final speed b) distance/(average speed) c) (...
*October 2, 2006*

**geometry**

State what conclusion can be made IFx=5 and the given statement is true IFx>x=z, then y=14z. I don't understand this part of your statement: "IFx>x=z," Please clarify this. If x>X-2, then y=14x Ok, I will suppose this is the question then "State ...
*October 2, 2006*

**Identifying controls and Variables**

i need help on controls and variables
*October 1, 2006*

**math**

Find the slope and the intercepts of each line. g(x)=54x-1 x=-3 Help please! :) g(x)=54x-1 x=-3 I am assuming that you are trying to determine the value of g(x) when x equals -3. If g(x)=54x-1 , then g(-3)=54(-3)-1 Evalute and you have your answer. No, sorry. g(x)=54x-1 and x...
*September 23, 2006*

**Physics**

the velocity is -24.65. the distance is 30.66 m
*September 17, 2006*

**Algebra**

I'm not quite sure about these problems. I know how to do them, but it seems that I get the wrong answer. Maybe I'm supposed to get 'no solution' but I'm not sure. Could someone please help me with them? 5|6-5x|=15x-35 2|3x-7|=10x-8 1/4|4x+7|=8x+16 Ok for 5...
*September 14, 2006*

**math?**

APPROXIMATELY, how much galloons of gas would it take to drive 4.4 miles? Does not have to be exact, just an idea.... The answer would depend on the average number of miles per gallon the vehicle gets. It might also depend on the road and weather conditios (going up or down ...
*September 1, 2006*

**making dot arrays**

which of the following # can be arrangerd into arrays w/ two rows:9,16,2,15,20,33
*August 21, 2006*

**sociology**

friday May, 3 2008 This site is awesome this is Axia studentsite. keep working this site is ours
*July 20, 2006*

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