Posts by frank

Total # Posts: 519

Statistics
To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question, as in 4B). What is the chance that she gets an A grade ...

Statistics
C(5,1)*(1/6)*(3/6)^4=0.05208333

Physics
Four students measure the mass of an object, each using a different scale. They record their results as follows: Student A B C D Mass (g)49.06 49 50 49.1 E 49.061 Which student used the most precise scale?

Math
32

Math
The range of a set of data is 15, and the interquartile range of the same set is 12. Which of the following statements is true about the set? A) The two ranges are close together, so there is probably an outlier in this set B) The two ranges are close together, so there are ...

biochem
I'm stuck on this question, not sure where to start. can you show detail and explain so that it helps me to understand it. help please, thanks. The value of delta G for the conversion of 3-phosphoglycerate to 2-phosphoglycerate (2PG) is +4.4kj/mol. If the concentration of ...

math
Add 3 2/5 and 7 1/3

physics
A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. What is the average speed and average velocity of the bicycle?

Math
On a Christmas package, Audrey needs to use only 40-cent stamps and 16-cent stamps. If she uses twice as many 40-cent stamps as 16-cent stamps, how many of each type of stamp must she use to mail a package costing \$5.76 in postage?

social studies
2013 social studies fair project: A turn in history Walt Disney Pre-Draft Please

Calc 1
integrate from 0 to pi/4 (sec^2x)/((1+7tanx)^2)^1/3 integrate form pi^2/36 to pi^2/4 (cos(x^1/2))/(xsin(x^1/2))^1/2 integrate from 0 to pi/3 (tanx)/(2secx)^1/2

Calc 1
integrate from 0 to pi/2 (3sinxcosx)/(1+3sin^2x)^1/2

SAT Essay
(Continued from part 1) It didn,t refer back to anything. You also need to explain WHAT CHANGES TOOK PLACE??? Here is another sentence that needs re working "Another example that portrays this idea was can be seen in "The Scarlet Letter" by Nathaniel Hawthorne...

SAT Essay
YOUR POINTS ARE FINE BUT THE ESSAY CAN DO WITH MORE ORGANIZATION;IT IS TOO "CHOPPY" BECAUSE YOU BOUNCE AROUND FROM ONE THING TO ANOTHER AND THEN BACK AND FORTH.iT IS DIFFICULT TO FOLLOW YOUR THOUGHTS. I suggest you rearrange the paragraphs by putting all the info of ...

English
your answers are correct but should Luis sentence be his dog? You have "hiss doing"

HOW MANY TIMES MORE IS 2000 THAN 20?

MATH
HOW MANY TIMES LESS IS 400 THAN 4 MILLION???

Math
the answer is 3!! DIVIDE 24 BY 8!

English
There are many ways to describe weather. If it is raining very hard, the idiom "It's raining cats and dogs is used. This is from ancient times when cats and dogs were on thatched roofs and would fall when the roof would collapse in heavy rain. Cats would get up and ...

math
how many times less is 400 than 4 million; explain

Accounting
The company’s fiscal year ends on December 31. Using the following information, compute depreciation for this machine for each of the 4 years using each of the following methods: Straight-line method Sum-of-years method Double-declining method Units-of-production Year ...

Accounting
ABC company purchased machine for \$300,000 that had a useful life of 5 years, with a salvage value of \$50,000 at the end its life. Depreciation was calculated over 2 years on straight-line basis. In 20X2, it determined that the total life should be 10 years with the salvage ...

Chemistry
Because we need to Cancel the mL and keep kj our main unit and the heat is released as a form of energy which is measured in Kj so basically u are multiplying these 2 numbers just for the sake of getting a pure q(calorimeter) in its energy form i.e Kj because ML is not an ...

math hw
286 + 93

Math
6.1

math
261 miles in 29 minutes

Science
Noodles

physics
Bob is pushing a box across the floor at a constant speed of 1.5 m/s, applying a horizontal force whose magnitude is 75 N. Alice is pushing an identical box across the floor at a constant speed of 3 m/s, applying a horizontal force. (a) What is the magnitude of the force that ...

algebra
mike is a sales man at a large home electrocis store. he receives 3% commission on everything he sells. one day he sold \$6500.00 worth of goods. how much commission did he make that day

math
a company has two job opening and has received a total of 50 applications. what is the chance that an applicant will get hired?

math
two coins are tossed list all the possible outcomes what is the probability that both of the coins land heads-up?

math
Suppose that \$20000 is invested at 7% interest compounded annually. Find that amount of money in the account after 1 year? need it broken down in algebra

math
Given the argument and its Euler diagram, determine the syllogism is valid or invalid. Those who play football. don Football and studying donft mix Those who studt Don is a football player ˆdon does not study

science
The solubility of NaCl in water at 100 degrees celsius is 39.1 g/100 g water. Calculate the boiling point of this solution?

Foreign languages
Can you please check these sentences, too? Thank you. 1) My friend was very upset because someone had stolen her bag before I saw her. I was waiting for the bus when I heard someone call my name. 2) I got home at half past four and immediately did my homework. We...

Religion
The covenant is described by our torah, "that if you obey all my commandments, then I will be your God and you will be my people. And I will dwell among you"

math
4b^7/5t^2 x 25t^4/16b Could someone help me with this?

Chemistry
Consider a tire at 35 Celcius filled with 32 psig of O2 instead of N2. Calculate the pressure in the tire at -18 celcius? Thanks!

Science
Writeacher, can you please check if the use of scientific English is OK. Thank you. 1) One of the other prominent scientists involved in the promotion of nanotechnology, Richard Smalley, has accused Drexler of ‘scaring our children’ and promulgating a vision of the ...

Science
Thank you very much for you invaluable help, Bob. Here is the last part of the same summary. 1) One of the other prominent scientists involved in the promotion of nanotechnology, Richard Smalley, has accused Drexler of ‘scaring our children’ and promulgating a vision...

Science
Here are the other sentences on the same theme I urgently need you to check. I hope you can help me. Thank you. 1) The existence of complex molecular structures present in every living system is used by Drexler to show the theoretical possibility of the design and construction...

Science
Bobpursley, could you please check if the following paragraph is written using a correct scientific terminology? Thank you. 1) Nanotechnology is the design, characterisation, production and application of structures, devices and systems by controlling shape and size at ...

math
The base of a triangle is 5cm greater than the height. The area is 52cm^2. Find the height and length of the base.

English
I left out the following sentences. Thank you. 1) In contrast to Defoe's novels, there is also a sense of individual development within the story: characters are not static and the reader is almost a witness to their gradual development, 2) Richardson's heroines have ...

Art
Writeacher, could you please check if everything is OK? Thank you. 1) Samuel Richardson was born into a Puritan middle-class family. He moved to London quite young, and there started working as a printer. 2) At the age of 51, when he was one of London's most reputable and ...

Art
I left out the following sentences. Thank you, Writeacher. 1) In contrast to Defoe's novels, there is also a sense of individual development within the story: characters are not static and the reader is almost a witness to their gradual development, 2) Richardson's ...

Art
Could you please check these sentences, Writeacher? Thank you. 1) Samuel Richardson was born into a Puritan middle-class family. He moved to London quite young, and there started working as a printer. 2) At the age of 51, when he was one of London's most reputable and ...

Art
Can you please tell me if the following sentences were written by a native speaker? Thank you, Writeacher. 1) The usefulness of the study of languages is due not only to the frequent political and commercial interests, but also to the increasing number of jobs which require a ...

Art
As I'm summarizing an episode, I used the simple present to refer to the present situation (he keeps her prisoner...) and the past to refer to the incident in the summer house. Could you please check it? 1) He keeps her (virtually) prisoner in his country house. 2)While ...

Chemistry
when an electron in a hydrogen atom transitions from the n = 5 level to the n = 2 level, what wavelength photon (in nm) is emitted? Thanks!

Art
I left out the following statements. I really need your revision. Thank you. 1) He keeps her (virtually) prisoner in his country house. 2)While she is wriing to her mum, her master surprises her. He accuses her of behaving foolishly for she informed both her parents and his ...

Art
Writeacher, I need your help to rephrase a few sentences. Thank you. 1) Eveline imagines the reactions of people at work when she has gone. Miss Gavan would be glad because she has always had an edge on her (I need to rephrase this). 2) On her turn, she will not cry many tears...

Art
When mentioning the exam's topics, can I include: Entire reading of abridged edition of Orwell's 1984. Is the adjective "entire" proper? Thank you, Writeacher.

Art
I simply need to state that the students read the abridged edition of Orwell's 1984. Complete (from the beginning to the end, not only an abstract) reading of Orwell's 1984 ?? Thank you

Art
I urgently need your help for two main reasons, Writeacher. 1) First, how would you express the following concept when presenting the programme for an exam: total (complete?)reading of the abdridged edition of Orwell's 1984. 2) Second, I need to find the paraphrase (and ...

Art
I urgently need you to check a few things, Writeacher. Thank you very much. 1) Eveline is thinking about (is "of" a mistake?) her past, present and future. 2) She feels in danger of her father's violence. 3) The sound of the music triggers (I need a synonym) ...

math
Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360lb. mixture that is 13% protein?

math
The length of a rectangle is 26cm. What widths will make the perimeter greater than 70cm?

Art
Thank you very much, Writeacher. Here are some more phrasal verbs related to phone calls I'd like you to check. Thank you again! 1) When I rang her the first time, we were/got cut off (the line dropped) and I had to call her again. 2) As soon as I got back home, I plugged ...

Art
Does "top up the phone" mean put money on your account? Can you give me an example, Writeacher? I need to include two or three more sentences on mobile phones, Writeacher. Could you please help me? 1) Parents have to shoulder responsibility for their children's ...

math
That would mean that there is no solution because they are the same, they would be consistent, and they would be independent?

math
8x-5y=-35 5y-8x=35 Is the above a point, have no solution, or infinatley many solutions?

Art
I left out the following sentences. Thank you, Writeacher. 1) You mustn't leave the school building without either your teacher's or your parents' permission. 2) You shouldn't revise for a test just the day before (the test). You shouldn't run in the ...

Art
Could you please help me find examples of phrasal verbs used in phone calls? Thank you, Writeacher. 1) You can call me up whenever you want to. Shall I ask him to call you back? 2) The line is engaged. Would you like to hang on/hold on? Hang on, I'll put you through/I'...

Foreign languages
Can you check these last sentences on the same theme? Thank you very much, Writeacher. 1) The server always calls his score first. If the server wins the first point, he gets a score of 15. The second point is called 30. The third point is called 40 and game is won when the ...

Art
I left out a last paragraph. Thank you very much, Writeacher. 1) In a tennis match there must be around sixty tennis balls, because everything happens very quickly. 2) The players must also have a lot of rackets, because if a player breaks his racket, he can change it. Tennis ...

Art
Thank you very much for your suggestions. I urgently need your help to check these statements on tennis. 1) The most important tennis shoots are forehand and backhand. These shoots are very important because when the ball bounces you must hit the ball with these two shoots (...

Art
I need to let you check a few things later. I hope you'll be there, Writeacher. 1) I need your help for a project work on Emily Dickinson and the theme of anorexia. Could you suggest one of her poems? 2) I also need your help to find a short description (four-five ...

Math
How do you solve: log2(x-1)+log2(x-2)=1 I got up to x^2-3x=0 Is it no solution or does it become x(x-3)? Thanks!

English
I urgently need you to revise these sentences. Thank you. 1) Some pupils haven't received any emails from their partners yet. Could you spur them to answer? 2) As you suggested, I've asked my students, who haven't got a partner yet, to forward their emails to your ...

Art
I left out the following statements. Thank you, Writeacher. 1) He believes that many adults censor the television because they fear losing (is "to lose" wrong?) control over their children. 2) He makes advances to her but his social rank hinders him from proposing ...

statistics
when 325 students are randomly selected and surveyed, it is found that 117 own a car. Construct a 99% confidence interval estimate of the true proportion of all college students who own a car.

Foreign languages
Could you please check if these disconnected sentences are possible? Thank you, Writeacher. 1)Italy sided with Germany (aslo allied with Germany) and declared war on the Western Powers. 2) Can I replace Italy with "she"? Example: Italy was invaded by the Allies in ...

Art
Sorry, I didn't notice you had checked my previous post. I still have a few doubts. Thank you. 1)He excuses himself by saying that on that occasion he didn't want to do her any harm. (Is "excuse" acceptable in this sentence?) 2) The plot is very simple and ...

Chemistry - Equilibrium Constant
1.58*10^-6

chemistry
what is hibs boson it is a gold particle

chemistry
Given the following information: Ni(OH)2(s) Ni2+(aq) + 2 OH (aq) Ksp=6.0 x 10 16 H2O(l) H+(aq) + OH (aq) Kw=1.0 x 10 14 What is the equilibrium constant for the reaction, Ni(OH)2(s) + 2 H+(aq) Ni2+(aq)+ 2 H2O(l)

Geometry
A sandpit in the shape of a rectangular prism has length 7 feet, width 5 feet, and height 1.75 feet. It is filled to the brim with sand. Joe puts this sand into a second sandpit having the same shape but a larger base. He needs 17.5 cubic feet of sand to fill the extra space ...

Math
I used 8 gallons of gas when I drove for 240 miles. How many gallons of gas are needed to drive 720 miles?

math
what is 800 as a percentage of 1400

Chemistry
Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

Chemistry
Yeah i know it now it is the henderson Hasselbach equation

Chemistry
Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

English
1. You can say "I just arrived home from being on holiday in France with my family. 2. My nephews did some Pirate games. 3. We flew back. (it is fine) 4. Its good as is. 5. On Christmas Eve I played some party games with my cousins and we proposed a toast to the New Year...

Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

math
set them equal to 180. like 3x+7x-40=180

math
Well you only gave me two angles is the other angle assumed to be 90 degrees?

chemistry
its add acid it worked for me

Science
You are correct. Atoms that are not close together. The reason is because when the atoms are not close together, it is going to need more energy to collide into each other than the ones with the high concentration that makes molecules and atoms easier to start chemical ...

science
In the fissioning of uranium, a chain reaction is caused by? ejected neutrons. the enormous energy release. the kinetic energy of the decay products. the conversion of mass to energy.

science
Thanks

Chemistry
Dr Bob, Thanks for the help with the conversion. I was missing the solution on two fronts. One was the wavelength factor and the other was the MegaHertz. Do you know where I can find more information on "wavelength of the radiation" ? There is not a lot of specific ...

Chemistry
I'm having a difficult time with the Conversion Units in my equation. Attempting to answer this question: My cell phone has an antenna about 10.00cm long. If this is one quarter of the wavelength of the radiation, at what frequency in Megahertz does it operate? Note that ...

science
My cell phone has an antenna about 10.00cm long. If this is one quarter of the wavelength of the radiation, at what frequency in Megahertz does it operate? Note that cell phones, like radio, transmit sounds via electromagnetic waves which travel at the speed of light or 3x108m/s

math
Open boxes are being designed to hold mail for the post office. The boxes will be made to have the greatest possible volume. Each box will be made from a sheet of metal that measures 15 inches by 12 inches. They will be formed by cutting and removing a square from each corner...

general science
a train goes forward at a speed of 1 m/s for 20 seconds. then it stops and goes backward at a speed of 0.5 m/s for 4 seconds. after both movements are completed, how far is the train located from its starting point.

physics
A person desires to reach a point that is 1.70 km from her present location and in a direction that is 40.0° north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she could travel to reach her ...

Chemistry
How many atoms of nitrogen are in a molecule of Al(No3)3

Astronomy 1010
You have two objects that are the same size, but one is significantly hotter than the other.How are the spectra of two objects different from one another? please detail help and answer..

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