Wednesday
July 23, 2014

Posts by heidi


Total # Posts: 111

Statistics/Probability
The life span of a calculator has a normal distribution with a mean of 60 months and a standard deviation of 5 months. If a calculator is randomly selected, find the probability that the calculator has a life span of. (1) more than 50 months (2) between 4 years and 6 years.

Statistics/Probability
The probability the New Year's day is on Saturday is a randomly chosen year is 1/7. 15 years was chosen randomly. Find the probability that, (1) Exactly four of these years have a New Year's day on a Saturday. (2) At least two of these years have New Year's day on ...

Statistics
The life of an electric light bulb is known to be normally distributed with a mean of 2000 hours and a std. of 120 hours. Find the probability that the life of such a bulb would be. (a) greater than 2150 hours (b) within the range of 1850 hours to 2090 hours

statisticss
The time taken by a man to deliver milk is normally distributed with, mean 12 minutes and standard deviation 2 minutes. He delivers milk everyday estimate the probability that he takes. (a) longer than 17 minutes (b) between 9 and 13 minutes

Math (statistics)
In an examination a candidate is given the four answers to four questions but is not told which answer applies to which question. He is asked to write down each of the four answers next to its appropriate question. b). show that there are 6 ways of getting just two answers in ...

Statistics
An unbiased die is thrown seven times. Find the probability of throwing it at least five six's.

math
In an examination a candidate is given the four answers to four questions but is not told which answer applies to which question. He is asked to write down each of the four answers next to its appropriate question. b). show that there are 6 ways of getting just two answers in ...

Chemistry
A butane lighter had a mass of 24.643 grams before lighting and a mass of 24.592 grams after. How many mL of CO2 were produced? Assume STP.

Chemistry
5.2 grams of magnesium metal are place in 400.0 mL of 1.0 M hydrochloric acid. The balanced equation for the reaction is: Mg + 2HCl = MgCl2 + H2. How many moles of H2 gas were produced?

math
what means out of 100?

math
brick= (3/4)+(3/4) brick=(6/4)=1.5

calculus
27 ft of wire is to be used to form an isosceles right triangle and a circle. Determine how much of the wire should be used for the circle if the total area enclosed is to be a minimum? Maximum?

algebra
you invest $2800 in an account that pays an interest of 5.5%, compounded continuously. calculate the balance of your account after 12 years.

math
Decrease

math
40% to 525 what is original amount.

science
A satellite completes one revolution of a planet in almost exactly one hour. At the end of one hour, the satellite has traveled 2.0 × 107 meters and is only 10 meters away from its starting point. What is the numerical value of the satellite's average velocity after ...

Physics
Thank you so much... Huge help

Physics
Calculate the ratio of the drag force on a jet flying at 1049 km/h at an altitude of 10.0 km to the drag force on a prop-driven transport flying at 560 km/h and at an altitude of 5.00 km. The density of air is 0.380 kg/m3 at 10.0 km and 0.670 kg/m3 at 5.00 km. Assume that the ...

Physics
A block with mass m = 16.1 kg slides down an inclined plane of slope angle 24.3o with a constant velocity. It is then projected up the same plane with an initial speed 3.35 m/s. How far up the incline will the block move before coming to rest?

Physics
Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of a horizontal table w...

Statistics
A unbiased die is thrown seven times. Find the probability of throwing at least five six's.

health
When a person has episodes of hypomania that shift back and forth with mild depression for at least two years, he or she has what form of bipolar disorder? A. BP-NOS B. Cyclothymic Disorder C. Bipolar I Disorder D. Bipolar II Disorde A?

health
In 2004, which ethnic or racial group was at a lower risk of suicide for people ages 65 or older? A. Hispanics B. Asian and Pacific Islanders C. Non-Hispanic Blacks D. Non-Hispanic Whites c

Physics
A downward force of 5.1 N is exerted on a -7.3 mcirco C charge. What is the magnitude of the electric field at this point?

math
Mine was wrong this is my husbands work. I am having a hard time understanding this math. (daughters 5th grade).Does place value start to the right of the decimal with tens?

math
I'll try.... 17; 17.001; 17.107; 17.11

math
can you put the following nmbers in order form least to greatest? 17.11; 17.107; 17; 17.001

business math
sam buys a $10,000.00 teasury bill at 5 1/2% what is the effective ratr?

math
if two angles are supplementery and one is 48 degrees more than 3 times the other what is the measure of the smaller angle

organic chemistry
how to calculate the % oil of thyme in thyme ? We did an experiment titled : the extraction of Thymol in thyme oil and the prof wants us to calculate the % oil of thyme in thyme... how do I do that ? Thanks

organic chemistry
how to calculate the % oil of thyme in thyme ? We did an experiment titled : the extraction of Thymol in thyme oil and the prof wants us to calculate the % oil of thyme in thyme... how do I do that ? Thanks

organic chemistry
how to calculate the % oil of thyme in thyme ? We did an experiment titled : the extraction of Thymol in thyme oil and the prof wants us to calculate the % oil of thyme in thyme... how do I do that ? Thanks

Organic chemistry
If the aspirin crystals were not completely dried before the melting point was determined, what effect would this have on the observed melting point ?

algebra
How do I divide 3sqrt40 by 3sqrt5?

psy
17. <11{6[1(07)71]}> The higher the price of an antique, the greater people’s expectation that the object is rare. That, in turn, makes the antique appear more valuable. If the statements above are correct, then offering an antique for sale at a bargain price (Point...

psy
<11{6[1(07)71]}> The higher the price of an antique, the greater people’s expectation that the object is rare. That, in turn, makes the antique appear more valuable. If the statements above are correct, then offering an antique for sale at a bargain price

Math
The length of a rectangle is 10cm greater than the width. The area is 551cm^2. Find the length and width

Math
x^2+bx+45, Find the value for b such that the trinomial is a square

math
Mr.Shea saved $2,500 in April. His monthly salary is Twice the amount he saved in April. In May, he saved a certain amount of money.He spent $4,200 more than the amount he saved. How much did he save in May.

math
you have a 20 x 20 area and you have 4 14 foot fences plus 4 4 foot fences and you need to house 9 dogs and none can be together how do you do it?

Chemistry
Beginning with the ideal gas equation show how density of a vapor may be determined? I have so far: n = (PV)/(RT) d= m/V n= m/MW by rearranging i get d = P(m/MW)/RT

English
MLA has updated. Now you have to include what sort of medium was used. in this case you should end with Print if a print source or Web if a web source. The other piece might be in the teacher asked you to include the url.

algebra
im just looking for problem set up

algebra
the number of students is 150 more than adults, the student tickets are $3 and adult tickets are $5 the total sales was 4730 how many students attended

Chemistry
How many grams of hydrogen can be produced by the electrolysis of water with a current of 0.290 A running for 5.00 min?

english/phonlogy
I need help in a project. I'm teaching a group of german students and I have noticed they say things like 'dis' and 'lai' instead of 'this' and 'lie'. I should identify the phonology problem and explain it precisely what it is. Please, can s...

arithmetic
WHAT IS THE ARITHMETIC MEAN OF 3, 5, 7, 9 AND 11

discrete math
Fill in the blanks: For all sets A and B, if A is in the set of B, then A union B in in the set of B. Proof: Suppose A and B are any sets and A in in the set of B. [we must show that __________] Let x be and element of _______. [we must show that __________] by definition of u...

microbiology
Which are the two other pathways necessary to obtain enough energy to accomplish the task?

Chemistry
To what volume should you dilute 50.0 mL of a 4.50 M KI solution so that 28.5 mL of the diluted solution contains 2.75 g of KI?

english
Thank you very much!!! The verb tenses are both present perfect?

english
or this... When a student has chosen to continue his or her education, her or she has started towards being financially secure in life.

english
When a student has chosen to continue their education, they have started towards being financially secure in life. Is that better?

english
When a student has chosen to continue their education, they have also started towards being financially secure in life. has chosen is part tense participle Is "have also started" present perfect tense?

Physics
Beatrice throws the 1st calculator straight up from the edge of the roof of a building. She drops a 2nd calculator off the side of the building 2 seconds after she has thrown the first one. If the height of the building is 40m, what must the initial upwards velocity of the 1st...

PHysics
.) Bailey has taken up parkour. She attempts to clear the gap between two buildings. Bailey is on a roof which is 50m high and she is attempting the jump to a building that is 42m high. a.) If the two buildings were built touching (i.e. there is no gap) How long would it take ...

Physics
.) Beth launches a rocket out in the courtyard. It stays in the air for 7.25 seconds before coming back down. a.) How high did it get? b.) With what velocity did it hit the ground upon returning to Earth? c.) What is its rate of acceleration as it slows down, reaches the peak ...

world history
how do i do a report that is due in 2 day that is on the 5 themes of geography and has to do with a current event i need help and i am having a break down how can i work like this HHHHHEEEEEELLLLLLLPPPPPPP ME

Algebra
A single-engine airplane carries enough fuel for an 8-hour flight. After the airplane has been flying for 1 h, the fuel tank begins to leak at a rate that would empty the tank in 12 h. How long after the leak begins does the plane have until it runs out of fuel?

Math
A cyclist and a jogger start from a town at the same time and head for a destination 11 mi away. The rate of the cyclist is twice the rate of the jogger. The cyclist arrives 1.1 h before the jogger. Find the rate of the cyclist.

medicine
What is a unit price and where is it found on?

Com220
Measuring the quality of care is essential to being able to identify which areas of patient care need improvement. A positive patient outcome is one measure of quality. What role do health care workers play in determining quality care?

3rd grade math
Mrs.Rossi wrote the following clues for a mystery number: •It is a 4 digit number •The tens are double the ones. •The thousands are double the tens. •The sum of the digits is 19. What number is it?

Physics
3000 Joules of energy in the form of heat are added to a copper block with a mass of 1 kg. What is the blocks temperature change?

algebra
Evaluate and tabulate the values of y for the given values of x. Tabulate your answer in the form of ordered pairs (x, y). y = 2x, for x = -2, -1, 0, 1, 2

english
Maya Angelou was a singer, actor, civil rights worker, journalist, and director. She was been through so much and has transcended into one of the world’s most famous authors. Out of all her past occupations, she is best known for her literary works.

english
thanks so much

english
I need help with my annotated bibliography thesis for Maya Angelou!!!!!!!? It is for a research paper. I has to include a bibliography of Maya Angelou and 3 of her works. I just need help with the thesis for the annotated bibliography.

math
I think it would be 30000000km^3

PHYSICS
A charged disk of radius R that carries a surface charge density ó produces an electric field at a point a perpendicular distance z from the center of the disk, given by: Consider a disk of radius 10 cm and positive surface charge density +3.7 mC/m2. A particle of char...

reimbursement methodolgies
You're reviewing reimbursement for a Medicare surgical craniotomy case. The case falls into DRG 1, which has a relative weight of 3.0970 and a geometric mean LOS of 6.3. The hospital's current standard reimbursement rate is $1500. Calculate the DRG reimbursement for th...

Computers
I have to generate OOP code for a system that tracks my CDs and DVDs. I have gotten through the defining of class and subclass and don't know what to do next. Do I need to create the records and then sort?

psychology
factors that enhance or impede information flow in each step of the process

biology
What is the difference between genetic mutation and transgenic organisms?

business statistics
For the following independent random samples, use the z-test and the 0.01 level of significance in testing as an approximation to the unequal variances t-test when comparing two sample means? H0: µ1 = µ2 versus H1: µ1 ≠ µ2. x¯1 = 33.5 s1 = 6....

business statistics
A sample of 40 investment customers serviced by an account manager are found to have had an average of $23,000 in transactions during the past year, with a standard deviation of $8500. A sample of 30 customers serviced by another account manger averaged $28,000 in transaction,...

2nd grade english
Need ideas on how getting an education is so important for children. please answer. Thx

Science
Can anyone find a site that gives all the general types o0f human cells/

PSY 210
Need help with this paper

PSY 210
paper summarizing each phase of the sexual response cycle for males, females, and commonalities for both males and females. Include a brief description of any sexual dysfunctions which can occur and common methods of treatment.

Marketing 230
How does an organization establish an IMC plan? What are some of the different stages that company goes through when developing their IMC strategy?

Finance. PLEASE HELP ME
1) growth rates The stock price of the company is $76 investors require a 14% rate of return on similar stocks If the company plans to pay a dividend of $5.00 next year the expected growth rate of the company's stock price is ______ percent 2) non constant dividends A comp...

Finance questions
1) growth rates The stock price of the company is $76 investors require a 14% rate of return on similar stocks If the company plans to pay a dividend of $5.00 next year the expected growth rate of the company's stock price is ______ percent 2) non constant dividends A comp...

finance
growth rates

english grammar
So would I change it to the following: The word someone is singular. Therefore you would change they’re to he or she.

english grammar
What is grammatically wrong with the following sentence? "If someone feels they haven’t been treated respectfully, the odds are they’re right."

english grammar
What is grammatically wrong with this sentence? "A person needs to submit their homework on time."

math
ideas on 3-d pyramids

math
Solve the following matrices.(sORRY I DONT KNOW HOW TO DO THE BRACKETS) B= 1, -4 -2, 1 3, 0 D= 0, 1 1, 0 G= -3, 1 4, 5 FIND: a) DG = b) GD = c) BG = d) DD = e) GG =

math
Solve the following matrices (I dont know how to do brackets so I will just use commas to seperate the numbers and put them in different lines) A= 0, -2, 3, 1 -3, 1, 0, 4 0, 5, -2, -1 B= 1, -4 -2, 1 3, 0 C= -1, 0, 2 0, 3, 4 0, 8, -1 E= 1 2 3 4 F= -2, 5 3, 7 0, 9 FIND: ) AE = b...

math
The length of a rectangular swimming pool is 15 feet longer than the width. If the perimeter is 82 feet, then what are the length and the width?

Microeconomics (need to see if i got these right.
31. If an increase in the price of a good leads to an increase in total revenue, then _____. (Points: 3) the supply curve must be price inelastic the demand curve must be price inelastic I CHOSE THIS ONE the supply curve is price elastic none of the above is correct 32. If a u...

Microeconomics (trying this question again)
Just want to see if i did good in my choices, thank you 11. If an economy has to sacrifice increasing amounts of good X for each unit of good Y produced, then its production possibilities curve is: (Points: 3) bowed out from the origin. I PICKED THIS ONE bowed in toward the or...

FORGOT ONE QUESTION
30. Using the midpoint method of elasticity to calculate price elasticity of demand eliminates the problem of ______. (Points: 3) different elasticities, depending on whether price decreases or increases I PICKED THIS ONE different elasticities because price and quantity are i...

Microecomonics (am i right..URGENT PLEASE)
11. If an economy has to sacrifice increasing amounts of good X for each unit of good Y produced, then its production possibilities curve is: (Points: 3) bowed out from the origin. I PICKED THIS ONE bowed in toward the origin. a straight line. a vertical line. 12. The fact th...

Microecomonics (need to see if i got these right
1. Microeconomics deals with: (Points: 3) the working of the entire economy or large sectors of it. economic growth. individual units in the economy. THIS ONE I PICKED all of the above. 2. The basic concern of economics is: (Points: 3) to keep business firms from losing money....

Finance Class Help (very very urgent) need asap
K this is what I have so far. I am wondering if i did the CAPM right and if that is all i need for that part and then I need to know how to do the Constant Growth Model. When you do yours, assume the risk-free return as 6% Assume the expected market return 12% The beta, divide...

Microeconomics help please (urgent)
I just want an idea on how to do this, so will only post one example: For each of the following situations, decide whether the bundle Lakshani is thinking about consuming is optimal or not. If it is not optimal, how could Lakshani improve her overall level of utility? That is,...

science
what does the Krebs cycle need to proceed?

Science
In the Krebs Cycle, does the ATP store energy or release energy?

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