Fay

Newest questions and responses by Fay
  1. probability

    Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine"s lifetime as exponentially distributed with parameter λ. The lifetimes of different engines are independent. One of the engines

    asked on November 28, 2018
  2. Math

    a girl spent 1/5 of her pocket money on sweets and 2/3 on toys. what fraction of her money did she spent? what fraction has she left

    asked on September 23, 2018
  3. Chemistry

    My school notes say : pH < pOH is acidic pH > pOH is basic Is this correct, I was thinking that if the pH is less than pOH than it was a basic solution

    asked on March 1, 2017
  4. Chemistry

    PartA: What volume of 10.0M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? TrisHCl is a weak base and the molecular weight is 157.67 g/mol. I found the solution, it is 6.67 milliliters. Part B: "The buffer from Part A is

    asked on February 4, 2017
  5. Biology

    In a population of Mendel's garden peas, the frequency of green-flowered plants (genotype aa) is 49%. The population is in Hardy-Weinberg equilibrium. What are the frequencies of the AA and Aa genotypes? I got 9% AA, 42% Aa as my answer, is this correct?

    asked on October 4, 2016
  6. Math

    How would I find the derivative of y=cotx with respect to x and also the answer should be in simplified form This is what I got: y= 1/tanx Y= cosx/sinx Idk what to do next

    asked on December 15, 2015
  7. organic chemistry

    Which has higher boiling point? A. Alkenes B. Alkadienes I think my answer would be A because it contains 1 double bond (1 pi bond)

    asked on September 6, 2015
  8. org chem

    Tca has greater acidity than acetic acid. Bcos of EAIE of 3 cl increases the positivity of carbonyl C making release of proton easier. Please explain. Why Cl increases positivity when Cl is infact an electronegative element

    asked on August 17, 2015
  9. org chem

    My prof asked us the requisites for e delocalization. Sigma e delocalization -Must have c-h bond next to a sp2C Pi e delocalization -Must have sp3 lone pair attach to an sp2C. Prof said there are more requisites besides on what ive written. I think if it

    asked on August 16, 2015
  10. Urgent math

    Find the partial sum Sn of the arithmetic sequence that satisfies the given conditions. a2 = 5, a5 = 6.5, n = 15 S15 =

    asked on August 10, 2015
  11. Urgent math

    A couple needs a mortgage of $300,000. Their mortgage broker presents them with two options: a 30-year mortgage at 8 1/2% interest or a 15-year mortgage at 7 3/4% interest. (Round your answers to the nearest cent.) (a) Find the monthly payment on the

    asked on August 10, 2015
  12. Urgent math

    A man gets a job with a salary of $40,000 a year. He is promised a $1900 raise each subsequent year. Find his total earnings for a 10-year period.

    asked on August 10, 2015
  13. Urgent math

    Express the repeating decimal as a fraction. 0.156156156...

    asked on August 10, 2015
  14. Urgent math

    Find the first five terms of the given recursively defined sequence. an = 3an − 1 + 6 and a1 = 1 a1= a2= a3= a4= a5=

    asked on August 10, 2015
  15. org chem

    Why does Oxygen8 has 2 lone pairs? Please help

    asked on August 4, 2015
  16. Algebra ASAP

    Suppose that $17,000 is invested in a savings account paying 5.1% interest per year. (a) Write the formula for the amount A in the account after t years if interest is compounded monthly. A(t) = (b) Find the amount in the account after 3 years if interest

    asked on August 3, 2015
  17. Algebra ASAP

    The half-life of krypton-91 ^(91Kr) is 10 seconds. At time t = 0 a heavy canister contains 6 g of this radioactive gas. (a) Find a function m(t) = m02^−t/h that models the amount of ^(91)Kr remaining in the canister after t seconds. m(t) = (b) Find a

    asked on August 3, 2015
  18. org chem

    When a solute dissolved in a solvent A. Freezing pt incrases B. Boiling pt increases C. Vapor pressure increases D. Concentration of the solvent My answer is B.

    asked on August 3, 2015
  19. org chem

    Law of partition means? I think it is distribution? How is this applied in extraction involvong immiscible solvent? Help please.

    asked on August 3, 2015
  20. org chem

    2 ethylpentane My answer for this is a correct name and structure but my teacher said it is incorrect.. Why? Please explain.

    asked on August 2, 2015
  21. Chemistry

    A neutralisa tionreaction occurs when 120 millilitres of 0.5 mol/l lithium hydroxide(aq) and 160 millilitres of 0.375 mol/l and HNO3(aq) are mixed in a insulated Cup. initially the solutions are at the same temperature. If the highest temperature reached

    asked on May 30, 2015
  22. Chemistry

    If the solubility of Ag2CO3 is 1.3×10^-4 mol/L what is the Ksp? I'm trying to do it but my answer I keep on getting is wrong and doesn't match the text book which is 8.8×10^-12

    asked on May 6, 2015
  23. Mathematics

    The distance to the nearest 100,000 km from the earth to the moon is given as 400,000 km. The average speed to the Nearest 500km/h is 3500km/h. Calculate the least and greatest time it takes the rocket to reach the moon  I figured out the formula speed =

    asked on April 1, 2015
  24. science

    A healthy human body maintains a temperature of about 37.00C. Explain how physical, chemical and nuclear processes all contribute, directly or indirectly, to keeping the human body at a constant temperature.

    asked on February 6, 2015
  25. EDU 650

    compare and contrast what the authors identify as 21st century skills with what you would identify 21st century skills

    asked on January 31, 2015
  26. statistics

    A multiple-choice test consists of 29 questions with possible answers of a, b, c, d. Estimate the probability that with random guessing, the number of correct answers is at least 14. z-value (Use continuity correction)= Probability=

    asked on November 22, 2014
  27. statistics

    An airline company is considering a new policy of booking as many as 182 persons on an airplane that can seat only 160 (Past studies have revealed that only 80% of the booked passengers actually arrive for the flight.) Estimate the probability that if the

    asked on November 22, 2014
  28. math

    The Math-Is-Fun T-shirt Company manufactures and sells screen-printed t-shirts. The fixed costs of operation for the company are $75,750 per month. T-shirts are sold to wholesale buyers for $8.99 each, but only cost the company $3.20 each to produce. If

    asked on July 6, 2012
  29. math

    Find the area of some figure which have radius of 42cm and degree60

    asked on March 10, 2012
  30. Stats

    a die is rolled three times. find the chance that not all the rolls show 3 or more spots

    asked on December 4, 2011
  31. Stats

    A bag contains 7 blue marbles, 18 red marbles, and 16 orange marbles. Find the chance that neither draws are orange.

    asked on December 4, 2011
  32. child daycare

    wat is a developmental achievement of a two-months-old infant? a. rolling from side to back b.Eruption of teeth c.Good control of head d. Turning toward the source of a sound 2. a condition often brought on by an allergic reaction is a. anemia b.diabetes

    asked on November 7, 2011
  33. psychology

    1) What were some of the irrational beliefs and attitudes that the characters displayed?

    asked on May 30, 2011
  34. 10th grade

    If a circle has a diameter of 7inches, what is the circumference rounded to the nearest whole number? Use pi=3.14

    asked on November 18, 2010
  35. English

    I nees help with infinitive phrases and if it is a noun, adj., or adv. My question is: The political prisoner refused to denounce his principles.

    asked on February 23, 2010
  36. algebra

    y= mc + b

    asked on February 12, 2010
  37. math

    what is the fact family for 10, 7 and 8

    asked on January 20, 2010
  38. 1st grade

    what is the fact family for 4,6 and 9

    asked on January 20, 2010
  39. english

    change the first letter to mean a sort of attic no word mention english - Ms. Sue, Thursday, December 10, 2009 at 11:00pm What word are you supposed to use?

    asked on December 11, 2009
  40. english

    change the first letter to mean a sort of attic

    asked on December 11, 2009
  41. 2nd grade

    change one letter to make the opposite of quiet

    asked on December 11, 2009
  42. geography

    what are the 5 main coastal features?

    asked on June 28, 2009
  43. helth

    finding wat the wic program gets their funding.

    asked on June 21, 2009
  44. Helth

    700 words paper evaluating the financial aspects of the Wic Program How do they fund their programs? o How reliable are their funding sources? o Do they implement financial accountability measures to ensure that funds are being used properly? o What

    asked on June 21, 2009
  45. English Composition

    What can we learn about the Early Ancient Civilizations by reading works like The Epic of Gilgamesh?

    asked on June 6, 2009
  46. science

    freshwater resource challenge

    asked on January 30, 2009
  47. Research Report

    Can somebody help with good resources for a research report on airplanes?

    asked on December 8, 2008
  48. Discussion Question 2

    How does the author of AIDS in Africa: Dying by the numbers organize information to build his argument? Does he include any counterarguments? Why or why not? What kinds of statistics, graphs, or illustrations does the author include? In what ways do these

    asked on August 28, 2008
  1. Science

    Thanks!!!

    posted on May 29, 2018
  2. Spanish

    Los estudiantes compran los libros

    posted on November 17, 2016
  3. physics

    fgay

    posted on April 26, 2016
  4. organic chemistry

    Yes.. So alkadiene is much more volatile than alkene?

    posted on September 6, 2015
  5. org chem

    Pls answer

    posted on August 17, 2015
  6. org chem

    And also how would i know if the molecules or element in structure is either electrifilicity or nucleofilicity? For ex. Acetone. The carboxyl C is + and O is - but when you draw a canonical structure of it the H in ch3 became + and has double bond with

    posted on August 16, 2015
  7. org chem

    Ohh. Now i get it!! Thank you dr. Bob!

    posted on August 3, 2015
  8. org chem

    I have tried drawing it. But its still correct.. Ch3-ch(c2h5)-ch2-ch2-ch3 I don't see anything wrong about this.

    posted on August 3, 2015
  9. org chem

    Answer pls

    posted on August 2, 2015
  10. 2nd grade

    44

    posted on October 24, 2014
  11. maths

    x=28

    posted on February 8, 2012
  12. Music

    Explain how music and culture influence one another. Provide an ...

    posted on October 13, 2011
  13. 8th grade

    89

    posted on October 13, 2011
  14. Food and Nutrition

    foods from animals legumes green and yellow vegetables fruits fats and oils fats and oils staples

    posted on June 7, 2011
  15. English

    Is it a noun?

    posted on February 23, 2010
  16. english

    here is another question change the middle to make aother word for a brute (hint rhymes with out) thanks

    posted on December 11, 2009
  17. 2nd grade

    no othe rword mention "quiet"

    posted on December 11, 2009
  18. Helth

    is there any othe funding they get

    posted on June 21, 2009
  19. Helth

    Ok I thing the grands are calle fy's.

    posted on June 21, 2009
  20. Helth

    thanks

    posted on June 21, 2009
  21. English

    did you do this exam? can you please tell me how you did it? I am currently working on it now and it is really confusing. Thanks

    posted on January 28, 2009
  22. Algebra 1: 8th Grade

    y = xk

    posted on October 8, 2008