Thursday
March 5, 2015

Posts by DiANA


Total # Posts: 739

math
what is the z-score for the given raw score, mean and standard deviation, assume a normal probability dist. raw score=66,u=60, and 0=6 u and o are those wierd symbols is the answer 1, 10, 6, or 66
August 8, 2009

math
Decide which variables described is likely to have a normal or near normal distribution a. the number of courses remaining until graduation for the students in a small liveral arts college b. the SAT math scores for students in an advanced placement math class i think the ...
August 7, 2009

math
thank you for your help. The answer is A. Right?
August 7, 2009

math
two cards are drawn without replacement from a 52 deck of cards. what ae the odds against drawing a club and a diamond? can you walk me through this? thank you
August 7, 2009

math
how many batting lineups of the nine players can be made for a baseball team if the cathcher bats first, the shortstop second and the pitcher last?
July 29, 2009

math
how many 4 character license plates are possible with 2 letters of the alphabet followed by 2 digits, it repetitions are allowed? if repetitions are not allowed?
July 29, 2009

math
on a tv game show, the contestant is asked to select a door and then is rewrded with the prize behind the door selected. if the doors can be selected with equal probability, what is the expected value of the selection if the three doors have behind them a 40 thousand dollar ...
July 29, 2009

Chemistry
I am trying to study for my final exam. I am just trying to do my review packet and i just want to see if i am getting them correct. but what i got was 1) 3,3 2) 2 3) 120 4) idk how to do that one.
May 21, 2009

Chemistry
#1) The Lewis structure of PF3 shows that central phosphorus atom has ___ nonbonding and ___ bonding electron pairs. #2) How many equivalent resonance forms can be drawn for CO3^-2? (carbon is the central atom) #3) The bond angle in NF3 is slightly less than ___? #4) Sample of...
May 21, 2009

chemistry
The total pressure in a flask containing air and ethanol at 25.7C is 878 mm Hg. The pressure of the air in the flask at 25.7C is 762 mm Hg. If the flask is immersed in a water bath at 30.0C, the total pressure is 980 mm Hg.The vapor pressure of ethanol at the new temperature ...
April 27, 2009

geometry
how do u do statements and reasons
April 19, 2009

CRT 205
100 words per question in the future, how will thinking critically influence the ways that you read? Write?, Process Information?
April 6, 2009

social studies
I am trying to unsramble a city the word is i tall tacks ye. Thanks
March 29, 2009

algebra
I need help with this problem (7,7);4x+5y=9
March 27, 2009

College Accounting
Re: Homework Text: College Accounting, 19th Edition Page 227-229 Can you provide me with the trail blances for May: Comprehensive Problem 2 - The General's Favoriate Fishng Hole. I am really having a problem with this assignment and I would greatly appreciate your help. ...
March 19, 2009

College Accounting
Re: Homework Can you provide me with the trail blance for May: Comprehensive Problem 2 - The General's Favoriate Fishng Hole. I am really having a problem with this assignment and I would greatly appreciate your help. Thank you Diana Couturier
March 19, 2009

business law
On March 5, 2009, Andy, a local MP3 supplier, calls Betty, a local electronics chain retailer, offering to supply her with 1000 red IPODS, 1000 black IPODS, 1000 white IPODS and 1000 green IPODS at $ 200 per IPOD which Betty agrees to. After hanging up the phone, Andy ...
March 5, 2009

Chemistry!!!
to aslution of analyte NH3nh4and h2s were add ared ppt was formed
March 5, 2009

Chem
Nevermind, I figured it out from the original formula you gave me and got the correct answer. Thanks for your help!!
February 18, 2009

Chem
I am not familiar with the ^- symbol in the equation after # Cl. Is that referring to the power, such as Cl3?
February 18, 2009

Chem
Which of the following solutions of strong electrolytes contains the largest # of moles of chloride ions: 100.0 mL of 0.30 M AlCl3, 50.0 mL of0.60 M MgCl2, or 200.0 mL of 0.40M NaCl? What formula is used?
February 18, 2009

statistics
An instant lottery scratch-off game offers a 0.04 probability of winning on any one play. Plays are independent of each other. If you play 7 times, what is the probability you win at least once?
February 13, 2009

Mathbegining and intermadiate algebra
12/5 - 1
February 9, 2009

health
i need help with my project i need at least 65 or 5 advantages and disadvantages of bein a neonatal nurse please help me thanks
January 18, 2009

chemistry desperately
alright thank you i think i should be able to figure it out. and i know we only did 3 trials though
December 16, 2008

chemistry desperately
i am completely lost, i confused myself. i need to find the concentration of HC2H3O2 HC2H3O2 + NaOH ==> NaC2H3O2 + HOH NaOH C= 0.3 M v= 0.25 L n= 0.075 moles M= 40.00g/mol m= 3.00 g NaC2H3O2 n= 0.075 moles m= 0.4973 g(ammount of acetic acid in solution) HC2H302 v= 0.020 L M...
December 16, 2008

chemistry grade 11
alright thank you:)
December 15, 2008

chemistry grade 11
(avg. ammount of substance) ( 28.0 mL + 27.3 mL + 27.5 mL ) / 3 = 27.7 mL HC2H3O2 + NaOH => NaC2H3O2 + HOH n= M x L = 0.30 M x 0.0277 L = 0.00831 mols unknown:NaC2H3O2:x:1mol:NaC2H3O2:/ known:NaOH:0.00831 mols:1 mol:NaOH: x=0.00831 mol molar mass of HC2H302: H x 4 = 4.04 C ...
December 15, 2008

chemistry grade 11
alright! thank you, you just helped me figure it out! i didnt use all the info provided properly
December 15, 2008

chemistry grade 11
i have a question about finding the concentration of a substance then changing it to a percent. i check over my notes and i can't find it. the concentration of an unkown substance is 0.831 M and the two given substances are 4% and 5.5% so i do not know howto calculate ...
December 15, 2008

mathh
thank you:)
December 14, 2008

mathh
oh shoot i wrote it wrong its: 1 + 2sinxcosx = sinxcosx sinx + cosx
December 14, 2008

mathh
this is for proving identies and its fustrating i can't solve this one question! lol x=feta (btw the first part is supposed to be divided by the bottom) 1 + 2sinxcosx + sinxcosx sinx + cosx (1 + 2sinxcosx / sinx + cosx) + sinxcosx
December 14, 2008

math
help with ratios pleeeeeeeeeeeease or i get an f
November 8, 2008

business
Other than Microsoft, is there a website where I can learn about formating business letters, memos, etc.?
October 13, 2008

science
thanks Ms.Sue for your help
October 8, 2008

science
what conditions do scientists examine when they monitor volcanoes?
October 8, 2008

code of ethics
I am working on a paper about ethics in professional healthcare/medicine. It is difficult for me to word it properly, but here goes: Is "the right to die, or assisted suicide a question of ethics-or a moral dillema that healthcare professionals face? (helping terminal ...
October 7, 2008

math
I'm surprised I didn't think of that. Thank you.
October 2, 2008

math
The average (arithmetic mean) of 4 numbers is greater than 7 and less than 11. What is one possible number that could be the sum of these 4 numbers?
October 2, 2008

college
what is another name for herpetologist? is it zoologists? thanks.
September 23, 2008

internet security
Where can one go to download free and legal music without a catch? Is there truly such a site?
September 19, 2008

CALCULUS
A PIECE OF SHEET METAL IS 2.6 TIMES AS LONGS AS IT IS WIDE. IT IS TO BE MADE INTO A BOX WITH AN OPEN TOP BY CUTTING 3-INCH SQUARES FROM EACH CORNER AND FOLDING UP THE SIDES. IF THE VOLUME OF THE BOX MUST BE BETWEEN 600 AND 800 CUBIC INCHES, WHAT VALUES OF X WILL PRODUCE THIS ...
July 24, 2008

CALCULUS
For the piecewise function, find the values g(-8), 8(3), and g(8). g(x)={X+6,FOR X<=3 7-x, for x>3
July 24, 2008

math
For the piecewise function, find the values g(-8), 8(3), and g(8). g(x)={X+6,FOR X<=3 7-x, for x>3
June 5, 2008

grammar
The researcher structures the study by addressing three topics which include the research question, the researcher’s perspective and also the sample selection. On the above sentence, do I need to put a colon after include, or is the sentence fine the way it is?
April 15, 2008

grammar
Do I use a colon or a period at the end of the following sentence? According to the author of this article, the hypothesis is as follows
April 2, 2008

arithmetic
How do you solve this problem 1 1/5 minus 3/8?
March 25, 2008

spelling
i will like to make a word with these letter aaiemctmsh
March 13, 2008

Ratios Math
i need help with ratios in math
March 1, 2008

Marine Biology
Any ideas where I can read online articles about marine species and the different types of habitats along coastal beaches?
February 13, 2008

earth
whats limestone used for?
January 29, 2008

bilology
What do algae, kelp, and seaweeds have in common? How are they different?
January 28, 2008

CIS Microcomputers Application
It could be a cookie................
January 11, 2008

Physics
I dont know what to make for a physics experiment?
January 4, 2008

RE: Water
If I boil water at home, when and how do I know I've boiled the water long enough to make distilled water?
January 1, 2008

Nutrition
What is the difference between drinking water and distilled water? Can we make our own distilled water?
January 1, 2008

English
Could you tell me which words in column A have the same vowel sound as the words in clumn B. Column A Column B Path Butter Here Weight Saw Trouble Wide Put Hit-------------- File Look Weird Stool Laugh Luck Taught Heat Cheese Table Prune Pronunciation Eye Pan Matter Thanks.
December 19, 2007

Bowling
Where can I download a bowling score sheet?
December 14, 2007

math
how do I compute sales tax? $1,367.85. sales tax rate is 5.75%. also, how do I add in city tax?
December 9, 2007

Bowling
Where can I download free score-keeping sheets for bowling?
December 2, 2007

math please help
12x^2y+18xy^2 and the answer is 6xy(2x+3y) how do you get that answer?
November 27, 2007

History
I go to the Middletown High School and I lost the combination to my locker which has my Global Histoory textbook in it. I was hoping somebody would be kind enough to tell me what the questions are on page 26 numbers 3-7 and page 31 numbers 3-7. I realize that we might not have...
September 28, 2007

science (graphing data)
on the axis of my graph i want to have my scale begin with 100 and then count by tens to 300. can I just start with 100 or do i have to put in a symbol or something first? If so, what's the symbol?
September 12, 2007

math 117
A garden area is 30 ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400 ft2, what is the width of the path? using the quadratic formula I did the following: Let x = distance between the inner rectangle and the outer ...
August 9, 2007

Life Science
How did Mendel novel approach contribute to his success in describing how traits are inherited Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1. http://en.wikipedia.org/wiki/Heredity (at the bottom, be sure to click for additional information ...
August 4, 2007

math/algebra
17 simplify 3/(x-5) + 1/ 1 - 4/(x-5) The non-use of grouping symbols makes this sentence without meaning. The non-use of grouping symbols makes this sentence without meaning. 3/x-5 +1 / 1 - 4/x-5 = I never know how to write the problems so someone can understnad what I mean, ...
July 15, 2007

math/algebra
20 Divide: x^2 -49y^2/6x^2+42y divided by (x^2-7xy) = factor the first term. Multiply the first term by the inverse of the second.Combine terms. I will be happy to critique your work. (x-3)(x+5)/2(2x^2) * 2x-10 /x^2 - 25 = x-3/2x^2 ? or am I missing it somewhere :You are not ...
July 15, 2007

math/algebra
22. solve x/($a) - x/($b) = c what is this? The world wonders. believe it or not this was actually a problem that I have been given to solve. Any suggestions as to how I accomplish this?
July 15, 2007

math/algebra
subtract. express in simplest form 13x/30 - 4x/ 15 = factor the first denominator. Get a common denominator. Combine terms. I will be happy to critique your work. ok 13x/30 - 4x/ 15 = This is where I get lost, I know that I have to fins the LCD but when I do that it looks like...
July 15, 2007

math/algebra
add:Express in simplest form 4x/(x^2 -18x +72) + 4/(x-6) factor the first denominator. Get a common denominator. Combine terms. I will be happy to critique your work. ok hers goes 4x/(x-6)(x-12) + 4/(x-6)= 4x + 4/(x-6)(x -12) or am I completely lost? you factored correctly. ...
July 15, 2007

math
subtract: express your answer in simplest form. 5x-3/6 - (x+3)/6 answer choices a) 4x-1 b) 2x-3/3 c) 2x/3 -1 d) 2x/3 show me hou to arrive at the correct answer get a common denominator. get a common denominator. I thought 6 was the common denominator, why can't I use it ...
July 15, 2007

math/algebra
divide: x^2 + 2x -15/4x^2 divided by x^2-25/2x-10 answer choices a) x-3/2x^2 b) x + 3/2x^2 c) 2x^2/x + 3 d) 2x^2/x - 3 any your work is? any your work is? (x-3)(x+5)/4x^2 * 2x-1/x^2-25= x-3/2x^2
July 15, 2007

math/algebra
Subtract: express your answer in simplest form. 2/5 - y/y-2 answers a)-3y-2/y-2 b) -3y -2/5(4-2) c) -3y-4/5(y-2) d) -3y-4/y-2 The way you have written the problem, is 2/5 minus y^3. I dont think that is what you meant. Please use grouping symbols on fractions () or [] The way ...
July 15, 2007

math/algebra
Simplify: 3/4/4/5 answer choices are: a) 3/5 b) 5/3 C) 15/16 d)16/15 How do I go about solving this fraction, please show me how to work this. 3/4 divided by 4/5 1. Invert the second fraction. 3/4 / 5/4 2. Multiply the numerators and denominators. What answer do you get? 15/16...
July 15, 2007

math
During rush hour, Fernando can drive 20 miles using the side roads in the same time that it takes to travel 15 miles on the freeway. If Fernando's rate on the side roads is 9 mi/h faster than his rate on the freeway, find his rate on the side roads. What is the formula and...
July 14, 2007

math
What values for x must be exclued in the following fraction? x + 5/ -1 a) 5 b)none c) 0 d)-5 and how do I find the answer? if this is (x+5)/-1, no values. if you had a term like 1/(x-s), hten when x was equal to s, that is not allowed (rule: exclude all zero solutions in the ...
July 14, 2007

math 117
x/6- x/8=1 Find a common denominator for the two x-terms on the left. Then do the subraction to get x/? = 1 You do the rest. These are not hard questions
July 11, 2007

math 117
x/(x-2)- (x+1)/x= 8/(x^2-2x) notice that x^2 - 2x factors to x(x-2), which are found as the denominators of the first two fractions. Multiply each term by x(x-2), the rest is easy.
July 11, 2007

math 117
5/(x+6)+ 2/(x^2+7x+6)= 3/(x+1) Rewrite x^2 +7x +1 as (x+6)(x+1) Multiply both sides of the equation by that expression. You get 5(x+1) + 2 = 3(x+6) Multiply out the parentheses and combine similar terms. You will be left with a simple linear equation for x.
July 11, 2007

math 117
2/(5 )=(x-2)/20
July 11, 2007

math 117
Kevin earned $165 interest for 1 year on an investment of $1500. At the same rate, what amount of interest would be earned by an investment of $2500? At the same rate of interest, and period, the interest earned will be proprtional to the original principle. Therefore, you can...
July 11, 2007

math 117
A plane flies 720 mi against a steady 30 mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10 h, what is the plane’s speed in still air?
July 11, 2007

math 117
Ariana took 2 h longer to drive 360 mi on the first day of a trip than she took to drive 270 mi on the second day. If her speed was the same on both days, what was the driving time each day? Use the same method indicated in my response to your previous post. Thanks for asking.
July 11, 2007

math 117
A passenger train can travel 325 mi in the same time a freight train takes to travel 200 mi. If the speed of the passenger train is 25 mi/h faster than the speed of the freight train, find the speed of each. Speed = distance/time Therefore time = distance/speed. Assume the ...
July 11, 2007

math
If one half of one integer is subtracted from three fifths of the next consecutive integer, the difference is 3. What are the two integers? see other post.
July 11, 2007

math 117
If one half of one integer is subtracted from three fifths of the next consecutive integer, the difference is 3. What are the two integers? i got 24 and 25. (3/5 of 25) - (1/2 of 24) = 3 (n+1)*3/5 - 1/2 n =3 Right? I will be happy to critique your thinking. I suggest start by ...
July 11, 2007

math 117/algebra
simplify comples fractions. w+3/4w-----w-3/2w it is w-3 over 4w over w-3 over 2w q/f divided by t/u is the same as q/f multiplied by u/t, or qu/ft Division is the reciprocal of multiplication. q/f divided by t/u is the same as q/f multiplied by u/t, or qu/ft Division is the ...
July 11, 2007

math 117/ algebra
Fungicides account for 1/10 of the pesticides used in the US. Insecticides account for 1/4 of all pesticides used in the US. The two ratio of herbicides to insecticides used in the US can be written 1/10 ÷ 1/4 . Write this ratio in simplest form. see the other post ...
July 11, 2007

math 117/algebra
The combined resistance of two resistors R_(1 amd R_2 )in a parallel circuit is given by the formula R_(r= 1/(1/R_1 + 1/R_2 )) Simplify the formula. Help what is this talking about and how do I work it? find R as a function fo r`1 and r2. 1/R= 1/r1 + `1/R2 R= ??? Get a common ...
July 11, 2007

mat 117/algebra
2/(5w+10 )- 3/(2w-4) please show me how to work this problem. I assume this is some sort of combine the fractions, as there is nothing equal to the sentence above. factor out 1/((5w+10)(2w-4)) 1/((5w+10)(2w-4)) * ( 2*(2w-4) - 3(5w+10) ) do the multiplication in the paren.. 1...
July 6, 2007

mat117/algebra
1)Refer to the triangle in the figure. Find an expression that represents its perimeter. lft side 3/4x, right side 5/x^2 third side 1/x^2. 2)Find the perimeter of the given figure. x/2x - 5 and 8/2x - 3. 3)The volume of the box is represented by (x^2 + 5x +6)(x + 5) Find the ...
July 2, 2007

mat117/algebra
Factor completely. ax - ay + x^2 - xy please show me how to factor this problem a(x-y) + x(x-y) = (a+x)(x-y)
July 1, 2007

mat117/algebra
find the value of the polynomial 8x - 6 when x = 1 and when x = -1 8(1) - 6= 2 8(-1) - 6= -8 -6 = is the answer -14 or -2 -8 -6 = -14
July 1, 2007

mat 117/ algebra
My question is about scientific notations. Here is the problem. What I need clarification on is the power signs. When to add, subtract or multiply? (2.4 x 10^-5)(4 x 10^-4) is the anwer 9.6 x 10^-9 or 9.6 x 10^20 The answer is NOT 9.6 x 10^20. Rember your rules of exponents: ...
June 30, 2007

mat117/algebra
If the sides of a square are increased by 3 cm, the area is decreased by 36 cm^2. What were the dimensions of the original square? Please show me the formula and how to work. That doesn't sound possible. If the sides of a square are increased, the area must also be ...
June 27, 2007

mat117/algebra
factor each polynomial completely. to begin, state which method should be applied to the first step, given the guidelines of this section. Then continue the exercise and factor each polynomial completely. 2p - 6q + pq - 3q^2 Please help, I don't know how or where to begin...
June 27, 2007

mat117/algebra
Rewrite the middle term as the sumof two terms and then factor completely. Please show me the formula and how to use it correctly. 12w^2 + 19w + 4 19w can be written as 16w + 3w. Those are the cross product terms when multiplying 4w times 4 and 3w times 1. That is a clue that ...
June 27, 2007

mat117
Factor each expression a^2(b-c)-16b^2(b-c) Help show me how (b-c) appears in both terms and can be factored out, giving you (b-c)(a^2-16b^2) Now note that the second term can also be factored since it is the difference of two perfect squares. (a^2-16b^2) = (a+4b)(a-4b) Make ...
June 26, 2007

mat117
Determine whetere each of the following trinomials is a perfect square. If it is, factor the trinomial. x^2 - 24x + 48 I cannot get the 24x I've tried (x-24)(x - 2) What am I doing wrong? It is not a square. THe factors are 21.797 and 2.20, approximately.
June 26, 2007

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