# Posts by Valerie

Total # Posts: 268

**AP Calculus AB**

A farmer wants to create a rectangular pen, which will be divided into six separate sections, as shown in the accompanying diagram. If he has 600 feet of fencing to use, what outside dimensions will maximize the area of the pen?

*December 12, 2010*

**Math Please Help**

Which statement is true? A.Two angles can be complementary and equal. B.Two angles cannot be equal if they are complementary. C. An angle can be complementary only if it is 90°. D. Only three angles can be supplementary.

*December 5, 2010*

**1st grade**

read the clue

*November 8, 2010*

**math**

121

*November 4, 2010*

**statistics**

A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviation is 4.13, how large a sample is needed to get the desired information to be accurate within 0.68 ...

*November 2, 2010*

**statistics**

The diameters of apples in a certain orchard are normally distributed with a mean of 4.77 inches and a standard deviation of 0.43 inches. Show all work. (A) What percentage of the apples in this orchard is larger than 4.71 inches? (B) A random sample of 100 apples is gathered ...

*November 2, 2010*

**statistics**

Assume that the population of heights of male college students is approximately normally distributed with mean m of 70.63 inches and standard deviation s of 6.47 inches. A random sample of 88 heights is obtained. Show all work. (A) Find the mean and standard error of the x bar...

*November 2, 2010*

**statistics**

A sample of 134 golfers showed that their average score on a particular golf course was 87.43 with a standard deviation of 4.53. Answer each of the following (show all work and state the final answer to at least two decimal places.): (A) Find the 99% confidence interval of the...

*November 2, 2010*

**statistics**

Given a level of confidence of 99% and a population standard deviation of 12, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 78. Show all work.

*November 2, 2010*

**statistics**

Looking for help with some of my stats homework, I got parts of it but then hit a brink wall. Any help would be welcome. A recruiter estimates that if you are hired to work for her company and you put in a full week at the commissioned sales representative position she is ...

*November 1, 2010*

**physics**

the speed of a cyclist reduces uniformly from 2.5 m/s to 1.0 m/s in 12 s. (a) calculate the deceleration of the cyclist. (b) calculate the distance travelled by the cyclist in this time

*October 31, 2010*

**Math**

Why did Airhead eat the dollar he brought to school

*October 26, 2010*

**Finance**

Suppose you buy a 7% coupon, 20 year bond today when it's first issued. If interest rates suddenly rise to 15%, what happens to the value of your bond?

*October 26, 2010*

**Trig**

Find the general solution for the equation 4tanx+cotx=5?????? and the steps please? THANYOO!

*October 18, 2010*

**9th grade**

fuq math geeks

*October 12, 2010*

**french**

do you use le,la,l',les for this question? Ou,est-------- ordinateur?

*October 6, 2010*

**math**

how do you sketch a line with these characteristics: m>0 and b<0

*August 23, 2010*

**what can i compare middle school to?**

HiGh SChool Do u like the style!?!

*May 16, 2010*

**English**

Thanks! Yes, I noticed that awhile after I posted this...

*January 24, 2010*

**English**

I was wondering if someone could tell me how I can improve my thesis statement/opening paragraph. I'm writing an essay on hamlet from the perspective of formalism (examining a work of literature's language and structure). Here it is: Formalism is a type of literary ...

*January 24, 2010*

**maths**

Here are some expressions 1)pir^2l 2)2pir^2 3)4pir^3 4)abrl 5)abl over r 6)3(a^2+b^2)r 7)pirl The letters r, l, a and b represent lengths. pi, 2, 3 and 4 are numbers that have no dimensions. Three of the expressions represent volumes. Which ones are they? please could you help...

*December 17, 2009*

**maths**

the weird sign is pi

*December 17, 2009*

**maths**

Here are some expressions 1)ðr^2l 2)2ðr^2 3)4ðr^3 4)abrl 5)abl over r 6)3(a^2+b^2)r 7)ðrl The letters r, l, a and b represent lengths. ð, 2, 3 and 4 are numbers that have no dimensions. Three of the expressions represent volumes. Which ones are they? please...

*December 17, 2009*

**Physics**

I agree with the previous post except for the last part, it would be (1/4)*(2 pi)sqrt[(m+M)/k] instead.

*November 19, 2009*

**chemistry**

An alcohol has an OH- Functionality in it. Do you expect it to be a base? Why or Why not? I said it is a base b/c Alcohols have a slight tendency to lose the proton on the alcohol group, however less so than water, and so they do not significantly change the pH when added to ...

*October 15, 2009*

**Chemistry**

1. name one structural and one chemical difference between acetylene and ethylene. give rasons. 2. why is the benzene much less reactive than 1, 3,5-cyclohexatriene? 3. What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones?

*October 10, 2009*

**Chemistry**

I am trying to answer my questions for thermal decomposition of malachite lab. I have moles of malachite in 1g= 0.0045 moles of Cuo produced= 0.0009 ratio of moles of Cuo produced per moles of malachite decomposed=0.0045/0.0009=5.1 the balanced euation = CuCo3*Cu9OH)2 ----->...

*September 27, 2009*

**Psychology**

sorry i stand corrected, it is the third assingnment on here that i am having trouble understanding

*May 23, 2009*

**Psychology**

I was trying to look up some information that would make me understand this assignment better myself. I really do not understand it, what it is trying to ask of me, what to write on, and that's why i was looking online, when i cam across this. I don't agree on how this...

*May 23, 2009*

**literature**

How do the seasons reflect Dexter's emotions in Fritzgerald's "Winter Dreams"?

*April 11, 2009*

**re**

what do christians believe about free will? Wha problems does suffering caus for religious believers? thanks

*March 16, 2009*

**french mme sra**

I think I have done all the corrections. Please could you tell me if there's anything else wrong. Thankyou Pour le petit déjeuner ce matin j’ai mangé une banane et des raisins et j’ai bu de l’eau mais d’habitude je mange un bol de cé...

*March 6, 2009*

**french**

thankyou so much your help is much appriciated

*March 5, 2009*

**french**

does this sound alright? my teacher wants 100+ words Pour le petit déjeuner ce matin j’ai mangé une banane et des raisins et j’ai bu de l’eau mais d’habitude je mange un bol de céréales et bois du lait, c’est sain. Pour le d...

*March 5, 2009*

**chemistry**

The composition of a propane clathrate was found to contain 40.1 mL of water. Assuming that all the cavities of the clathrate was filled with propane, how many grams of propane did the clathrate contain?

*February 16, 2009*

**french**

J'adore = i love J'aime = i like ????????????? Je n'aime pas = I don't like Je déteste = I hate what is a neutral opinion?

*February 15, 2009*

**geography/ english**

Would it make sense to say: "He hopes the violence would soon be assuaged"?

*January 31, 2009*

**chemistry**

can someone confirm that the functional group of cocaine is the ch3n group. thanks

*January 11, 2009*

**science**

the sun is actually about 865,000 miles in diameter, so 1cm of the model represents how many miles?

*January 9, 2009*

**Stats**

Find probability that a randomly selected TV will have replacement time less than 6 yrs. mean is 8.2 yrs standard deviation is 1.1 then provide warranty of 1% will be replaced what is the time length of the warranty

*November 17, 2008*

**health**

what are some legal consequences of abusing stimulants

*October 28, 2008*

**Stat's**

Thank you

*October 26, 2008*

**Stat's**

Choose the probability as a fraction in lowest terms a.5/164490480 b.5/1370754 c.1/1370754 d.1/164490480 determine probability of winning a lottery from which 5 numbers are drawn without replacement from the set of numbers 1 to 46. in order to win, the 5 numbers must be ...

*October 26, 2008*

**physical sciences**

a thunderclap 200m away delivers 3.75E^-5 W/m^2 of sound. What is the sound level in decibels? What is the intensity of the sound at 10m from the thunderclap? What is the sound level in decibels 10m from the thunderclap?

*October 21, 2008*

**english**

how do you write an ode poem of minimun of 15 lines/

*October 16, 2008*

**Math**

First u have a place value in front of u then u start to answer the question so 4is four hundred 23billion ninety billion 7hundred nine thousand.

*September 12, 2008*

**percentage**

If I put $5,000 in a CD for a miniumum of 3 years, the bank will offer 3.25% interest. How much interest will I earn after 6 years?

*August 31, 2008*

**Chemistry**

the rest of the question asks: what is the indicator when X= 1.5, 3.5, 6.1, 8.9?

*April 8, 2008*

**science**

fallow a drop o water through three states of matter. describe what is happening to the molecules as the water turns to gas than describe what is happening to the molecules when the water freezes into ice

*March 4, 2008*

**science**

fallow a drop of water through three states of matter. describe what is happening to the molecules as the water turns to gas than describe what happening to the molecules when the water freezes into ice

*March 4, 2008*

**geology**

Do all sedimetary rocks react with Hydrochloric acid? Check this site for your answer. http://www.geomore.com/Sedimentary%20Rock%20Chart.htm

*August 9, 2007*

**Physics (pressure)**

What is the total mass of the earth's atmosphere? The radius of the Earth is 6.37E6 m, and atmospheric pressure at the surface is 1.013E5 N/m^2 (or Pa). I tried this: 1.013E5 Pa = Mg/ pi(6.37E6)^2 1.013E5 Pa (denominator)= 9.8 M solve for M: I'm coming with different ...

*May 3, 2007*

**social studies**

what is the old japanese art of growing small trees called? bonsai

*April 1, 2007*

**Poetry**

I need to learn the different meters and rhyming patterns of poetry?? Thank you for using the Jiskha Homework Help Forum. First of all is a pdf file: 1. server.remc11.k12.mi.us/bstpract/bstpract/165/165.pdf 2. http://owl.english.purdue.edu/owl/resource/570/01/ 3. http://en....

*March 20, 2007*

**algebra**

i forgot to post these! f(x)=9x+4 and listed in interval notation also: f(x) x2+14x+40 in interval notation and: 1/x^2+81 (interval notation) and: x+11/x^2-121 (interval notation) and: f(x+2) f(x)=6x^2-x+7 You have listed a lot of functions but have said nothing about what the...

*March 14, 2007*

**chemistry**

This is like the other one I posted about. I have to predict the product. Zinc (s) + sulfuric acid (aq) ----> ____ Please and thank you! This is a single replacement type reaction. Products are ZnSO4 and H2. Same type as Al and HCl. how do you know that H2 is alone instead ...

*February 27, 2007*

**chemistry**

Can someone please help me with this problem? Predict the products. Aluminum(s) + hydrochloric acid (aq) ---> ________ aluminum chloride + hydrogen Correct. AlCl3 and H2 thanks

*February 27, 2007*

**algebra**

Can someone please help me do this problem? That would be great! Simplify the expression: sin theta + cos theta * cot theta I'll use A for theta. Cot A = sin A / cos A Therefore: sin A + (cos A * sin A / cos A) = sin A + sin A = 2 sin A I hope this will help. in my algebra...

*February 18, 2007*

**Social Studies**

I am doing a descriptive writting report on a famous place in Europe and I chose the Louvre Museum. I can't seem to find really any information can you help me? Thanks! Try a travel guide website like Frommer's or lonelyplanet http://www.louvre.fr/llv/commun/home_flash...

*January 18, 2007*

**algebra**

Can somebody please help me with these problems? Factor the expression on the left side of each equation. Then solve. 1)x^4-5x^2+4=0 2)x^4-8x^2+16=0 Please and thank you! 1) let y = x^2, then y^2-5y+4=0 (y-4)(y-1)=0 y = 4 or y = 1 x^2 = 4 or x^2 = 1 x = -2, +2, -1, +1 same ...

*January 4, 2007*

**English**

We must truly become our brothers’ and sisters’ keepers. Is this written correctly? OR should it be We must truly become our borther's and sister's keepers. OR We must truly become our brother and sisters' keepers. Because the statement applies ...

*December 28, 2006*

**Linear Equations**

Directions: Use what is given to write an equation of a line in STANDARD, SLOPE-INTERCEPT, AND POINT-SLOPE form. 1. m = 3 (0,4) s=B4=3 si=3x+4 ps=y-4=3x Are we doing these correctly? I do not know what those forms mean, but if the line goes through (0,4) with slope 3, the ...

*December 20, 2006*

**Reading**

"The Great Rot Hunt" - Are these right. 1. The traps that Father set did not work because they were (d.) not set correctly. 2. The narrator retionalizes killing the rat by comparing it to a (c.) deer. 3. The narrator realizes that, to his father, success in sports is...

*December 20, 2006*

**Synonym/Antonym**

Word bank: locality, finally, legally, equality, fatality, actually, really, totally, mentally, morally, nationally, punctuality, generally, personality, individually, originality, practically, formality, technicality, sentimentality completely (S)________?totally physically (...

*December 13, 2006*

**analogies**

first is to last as originally is to _____ storm is to weather as outgoing is to ____ heavens is to sky as virtually is to _____ text is to script as ethically is to _____ white is to black as copy is to ____ detail (S) for it ______?orginality Do you have a word bank or ...

*December 13, 2006*

**Chemistry**

It is non polar because of the symmetry in its geometry.

*November 23, 2006*

**Math - Bases**

I'm looking for help with these maths problems

*October 29, 2006*

**The Holocaust**

I need some important facts about the Ghettos in the Holocaust. AMOUNT OF FOOD GIVEN EACH DAY the ghettos depending on whitch area you are talking about where mostly small apartments on what was the poor side of town (before the Nazis). they where small, dirty, and the stuck 1...

*June 15, 2005*