# 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

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

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

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

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?

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

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)

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

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

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 =

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

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.

13. ## Urgent math

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

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=

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

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

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.

19. ## org chem

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

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.

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

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

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 =

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.

25. ## EDU 650

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

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=

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

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

29. ## math

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

30. ## Stats

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

31. ## Stats

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

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

33. ## psychology

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

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

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.

y= mc + b

37. ## math

what is the fact family for 10, 7 and 8

what is the fact family for 4,6 and 9

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?

40. ## english

change the first letter to mean a sort of attic

change one letter to make the opposite of quiet

42. ## geography

what are the 5 main coastal features?

43. ## helth

finding wat the wic program gets their funding.

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

45. ## English Composition

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

46. ## science

freshwater resource challenge

47. ## Research Report

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

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

1. ## Gr. 3 math

Omg this is my kids grade 3 homework? Can I get some help? This is funny! Explain her answer, she’s 8! Lol

posted on January 9, 2019
2. ## Science

Thanks!!!

posted on May 29, 2018
3. ## Spanish

Los estudiantes compran los libros

posted on November 16, 2016
4. ## physics

fgay

posted on April 26, 2016
5. ## organic chemistry

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

posted on September 6, 2015
6. ## org chem

posted on August 17, 2015
7. ## 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
8. ## org chem

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

posted on August 2, 2015
9. ## 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 2, 2015
10. ## org chem

posted on August 2, 2015

44

posted on October 23, 2014
12. ## maths

x=28

posted on February 8, 2012
13. ## Music

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

posted on October 13, 2011

89

posted on October 13, 2011
15. ## Food and Nutrition

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

posted on June 6, 2011
16. ## English

Is it a noun?

posted on February 22, 2010
17. ## english

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

posted on December 10, 2009

no othe rword mention "quiet"

posted on December 10, 2009
19. ## Helth

is there any othe funding they get

posted on June 21, 2009
20. ## Helth

Ok I thing the grands are calle fy's.

posted on June 21, 2009
21. ## Helth

thanks

posted on June 21, 2009
22. ## 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
23. ## Algebra 1: 8th Grade

y = xk

posted on October 8, 2008