Fay
Newest questions and responses by Fay
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 
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 
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 
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 
Biology
In a population of Mendel's garden peas, the frequency of greenflowered plants (genotype aa) is 49%. The population is in HardyWeinberg 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 
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 
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 
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 
org chem
My prof asked us the requisites for e delocalization. Sigma e delocalization Must have ch 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 
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 
Urgent math
A couple needs a mortgage of $300,000. Their mortgage broker presents them with two options: a 30year mortgage at 8 1/2% interest or a 15year 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 
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 10year period.
asked on August 10, 2015 
Urgent math
Express the repeating decimal as a fraction. 0.156156156...
asked on August 10, 2015 
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 
org chem
Why does Oxygen8 has 2 lone pairs? Please help
asked on August 4, 2015 
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 
Algebra ASAP
The halflife of krypton91 ^(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 
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 
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 
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 
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 
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 
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 
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 
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 
statistics
A multiplechoice 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. zvalue (Use continuity correction)= Probability=
asked on November 22, 2014 
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 
math
The MathIsFun Tshirt Company manufactures and sells screenprinted tshirts. The fixed costs of operation for the company are $75,750 per month. Tshirts 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 
math
Find the area of some figure which have radius of 42cm and degree60
asked on March 10, 2012 
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 
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 
child daycare
wat is a developmental achievement of a twomonthsold 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 
psychology
1) What were some of the irrational beliefs and attitudes that the characters displayed?
asked on May 30, 2011 
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 
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 
algebra
y= mc + b
asked on February 12, 2010 
math
what is the fact family for 10, 7 and 8
asked on January 20, 2010 
1st grade
what is the fact family for 4,6 and 9
asked on January 20, 2010 
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 
english
change the first letter to mean a sort of attic
asked on December 11, 2009 
2nd grade
change one letter to make the opposite of quiet
asked on December 11, 2009 
geography
what are the 5 main coastal features?
asked on June 28, 2009 
helth
finding wat the wic program gets their funding.
asked on June 21, 2009 
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 
English Composition
What can we learn about the Early Ancient Civilizations by reading works like The Epic of Gilgamesh?
asked on June 6, 2009 
science
freshwater resource challenge
asked on January 30, 2009 
Research Report
Can somebody help with good resources for a research report on airplanes?
asked on December 8, 2008 
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

Science
Thanks!!!
posted on May 29, 2018 
Spanish
Los estudiantes compran los libros
posted on November 17, 2016 
physics
fgay
posted on April 26, 2016 
organic chemistry
Yes.. So alkadiene is much more volatile than alkene?
posted on September 6, 2015 
org chem
Pls answer
posted on August 17, 2015 
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 
org chem
Ohh. Now i get it!! Thank you dr. Bob!
posted on August 3, 2015 
org chem
I have tried drawing it. But its still correct.. Ch3ch(c2h5)ch2ch2ch3 I don't see anything wrong about this.
posted on August 3, 2015 
org chem
Answer pls
posted on August 2, 2015 
2nd grade
44
posted on October 24, 2014 
maths
x=28
posted on February 8, 2012 
Music
Explain how music and culture influence one another. Provide an ...
posted on October 13, 2011 
8th grade
89
posted on October 13, 2011 
Food and Nutrition
foods from animals legumes green and yellow vegetables fruits fats and oils fats and oils staples
posted on June 7, 2011 
English
Is it a noun?
posted on February 23, 2010 
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 
2nd grade
no othe rword mention "quiet"
posted on December 11, 2009 
Helth
is there any othe funding they get
posted on June 21, 2009 
Helth
Ok I thing the grands are calle fy's.
posted on June 21, 2009 
Helth
thanks
posted on June 21, 2009 
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 
Algebra 1: 8th Grade
y = xk
posted on October 8, 2008