# Posts by Valerie

Total # Posts: 284

**Math**

A contractor is considering a sale that promises a profit of $30,000 with a probability of .7 or a loss of $4,000 with a probability of .3. What is the expected profit?

**geometry**

Suppose you buy 1 ticket for $1 out of a lottery of 3,000 tickets. If the prize for the one winning ticket is to be $1,000, what are your expected winnings?

**chemistry**

35.0 g of an organic compound dissolved in 500. g of water have a freezing point of -3.72 degrees C. What is the molecular weight of the solute?

**Algebra**

Algebra - Damon, Wednesday, January 26, 2011 at 8:18am go ahead and graph it. Find some points x , y 0 , 12 1 , 10 -1 , 14 2 , 8 -2 , 16 3 , 6 -3 , 18 10 , 12 -10, 32 20 , 32 -20 52 30 , 52 -30 , 72 etc

**Algebra**

Graph the equations y=2|x-5|+2

**math**

21

**College Algebra**

#3 Choose the end behavior of the graph of the polynomial function. f(x) -x(x-3)(5x+2), I think I have to foil to get -5x^3-2x^2+15x+6 So I think this one rises to the left and falls to the right. Please let me know if I did these correctly. Thanks

**College Algebra**

#2 Choose the end behavior of the graph of the polynomial function. f(x) 3x^3+3x^2-6x-5. I got Falls to the left and rises to the right. Is this correct? Thanks

**College Algebra**

Choose the end behavior of the polynomial function. f(x)= -5x^5-9x^2+6x+1. I got left end up right end down. Is this right? Thanks

**Geometry**

Ok Dr. Russ helped me find one part of the question, but I still can't figure out the values of x that maximizes volume = in. Any help is appreciated. Thanks On a rectangular piece of cardboard with perimeter 11 inches, three parallel and equally spaced creases are made. ...

**Geometry**

Ok but I still don't know how to get the values of x that maximizes volume = in

**Geometry**

On a rectangular piece of cardboard with perimeter 11 inches, three parallel and equally spaced creases are made. The cardboard is then folded along the creases to make a rectangular box with open ends. Letting x represent the distance (in inches) between the creases, use a ...

**business math**

I'm trying to solve this problem: What sinking fund payment would be required at the end of each three-month period, at 8% interest compounded quarterly, in order to amount to 20,000. I just need to know how to work the problem correctly.

**geology**

Thank you sooo much Ms. Sue you have no idea how much better I feel!!! I shot my instructor an email to confirm or denie this but I am going to continue to research it as it is. Who knows when he will get back to me. Thank you again!!!!!!

**geology**

I found that same info but another site states the Lake Erie is part of the Lowland Plains. Are they the same as the Interior Plains?? I am so lost and trying to research for my final. Thanks for your help Ms. Sue!!!!

**geology**

Is Lake Erie considered a part of the Interior Plains?

**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?

**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.

**1st grade**

read the clue

**math**

121

**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 ...

**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 ...

**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...

**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...

**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.

**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 ...

**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

**Math**

Why did Airhead eat the dollar he brought to school

**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?

**Trig**

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

**9th grade**

fuq math geeks

**french**

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

**math**

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

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

HiGh SChool Do u like the style!?!

**English**

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

**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 ...

**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...

**maths**

the weird sign is pi

**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...

**Physics**

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

**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 ...

**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?

**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 ----->...

**Psychology**

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

**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...

**literature**

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

**re**

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

**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...

**french**

thankyou so much your help is much appriciated

**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...

**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?

**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?

**geography/ english**

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

**chemistry**

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

**science**

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

**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

**health**

what are some legal consequences of abusing stimulants

**Stat's**

Thank you

**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 ...

**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?

**english**

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

**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.

**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?

**Chemistry**

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

**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

**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

**geology**

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

**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 ...

**social studies**

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

**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....

**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...

**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 ...

**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

**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...

**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...

**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 ...

**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 ...

**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 ...

**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...

**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 (...

**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 ...

**Chemistry**

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

**Math - Bases**

I'm looking for help with these maths problems

**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...