# Posts by mark

Total # Posts: 1,608

**English**

He hurt his fist trying to open the window.

*February 25, 2010*

**Math**

Find the coordinates of the turning point and determine wether it is minimum or maximum. y=xlnx-2x The answer in the book says the co-ordinates are (e,-e), the closest I have come is (1/lnx,-1/lnx) which works if 1/lnx=e, but I don't think that it does. This question is in...

*February 25, 2010*

**Chemistry**

How do I know which of these .1M solutions will have a pH less than 7? KF, NH4I, NaH2PO4, Fe(NO3)3 I am guessing all but KF is acidic...but if someone could confirm this and explain why that would be helpful

*February 24, 2010*

**P. Chemistry**

If given the Ka or Kb and pKa and pKb, how do you find the initial concentration of a weak acid/base in a solution given the pH? Is there an equation for this? I can't find anything in my notes and am not sure what to look for.

*February 23, 2010*

**P. Chemistry**

A student added solid K2O to a 750.0 mL volumetric flask. The solid was dissolved in water and then the flask filled with water to the mark. This formed 750.0 mL of the initial KOH solution. 20.0 mL of the initial solution was transferred to another flask and diluted to 200.0 ...

*February 23, 2010*

**Accounting**

2. b

*February 22, 2010*

**physisc! URGEENT**

The current is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible?

*February 21, 2010*

**Mega Stat**

How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.

*February 20, 2010*

**statistics**

How do you know the p-value on megastat. On minitab It looks like it gets a different p-value than megastat. I got a number from megastat of 2.35E10 and on minitab it was 0.000.

*February 20, 2010*

**science**

describe a pond and indicate the types of interdependence of living things in it

*February 18, 2010*

**science**

describe a pond and indicate the types of interdependence of living things in it

*February 18, 2010*

**Chem**

When 0.10 g of insulin is dissolved in 0.200 L of water, the osmotic pressure is 2.30 Torr at 20°C. What is the molar mass of insulin? I tried using the van't hoff equation, converting Torr into atm; but not sure how to do it. my teacher didn't really explain this ...

*February 15, 2010*

**statistics**

Number sampled is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation. Can we answer this with using the sampling distribution of the sample proportion?

*February 13, 2010*

**statistics**

If sample number is 1,000 and mean is 7.2 on a scale from 1-10 how do I determine standard deviation.

*February 13, 2010*

**MA 005**

The width of a rectangle is 3ft. less than the length. The perimeter is 62ft. Find the length and the width od the rectangle.

*February 12, 2010*

**criminal justice**

During the middle Ages, defendants could avoid serving a harsh penalty if they were granted

*February 8, 2010*

**business**

Explain the difference between fiscal policy and monetary policy. Discuss how each of these approaches can be used to influence the state of the economy.

*January 31, 2010*

**algebra**

Joe's larger tank is completely filled with water. He takes water from it to completely fill the small tank. Determine how many cubic inches of water will remain in the larger tank The larger tank is 12 x 30 x 16 and the smaller tank is 6 x 12 x 9.

*January 30, 2010*

**Math**

The average of a set of five different positive integers is 360. The two smallest integers in the set are 99 and 102. What is the largest possible integer in this set?

*January 29, 2010*

**math**

(5)(3/5)(x+2)=(5)(x-4) 3(x+2)=(5)(x-4) 3x+6=5x-20 3x+6+20=5x-20+20 3x+26=5x 3x-3x+26=5x-3x 26=2x x=13

*January 29, 2010*

**Physics**

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 seconds later.

*January 28, 2010*

**Physics**

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.10 later. What was the rocket's acceleration?

*January 28, 2010*

**math**

find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median

*January 28, 2010*

**math**

find all possible values of x such that, when the five numbers x, 14, 11, 6, 17 are arranged in order, the mean is equal to the median

*January 28, 2010*

**fallacy**

It takes someone with a really big heart to give to our charity , and you seem like someone who cares more than most . ...

*January 17, 2010*

**business**

Thank you Ms.Sue, for the resource.

*January 16, 2010*

**business**

I need help with this question whats the social and cultural customs that Walt Disney could encounter overseas?

*January 16, 2010*

**business and tech**

What are some advantage of globalization?

*January 13, 2010*

**MATH**

What percent of 49 is 7

*January 12, 2010*

**MATH**

25 is what percent of 365? What percent of 128 is 24

*January 12, 2010*

**Math**

What percent of 185 is 35?

*January 12, 2010*

**algebra**

solve each system using elimination x+4y=12 and 2x-3y=6

*January 12, 2010*

**Math**

Could someone Please tell me how to go about doing these two problems. Thank You.

*January 12, 2010*

**Math**

Multiple Choice: Mary Jane gets a student rate of $27.50 a month for health insurance. There is a $200.00 deductible, but no coinsurance payment. She recently received treatment for a covered condition. The bill was $2,350.00 Mary's insurance company provided payment of 80...

*January 12, 2010*

**chemistry**

F is not he right answer

*January 11, 2010*

**business and tech**

lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing, When disasters hit an area, the cost of everything seems to go up immediately?

*January 11, 2010*

**business and tech**

lets say that price gauging didn't happen,and the merchants sell the goods at the market price but with laws of supply and demand how would that be a good thing?

*January 10, 2010*

**business and tech**

I need help on this question. "When disasters hit an area, the cost of everything seems to go up immediately: food, water, housing, gas and so forth. Explain why this phenomenon may be a good thing, using the laws of supply and demand". thank you very much

*January 10, 2010*

**Algebra 1**

1.c 2.b 3.b 4.c 5.c

*January 10, 2010*

**SCIENCES**

TEN EXAMPLES OF SUSPENSION AND SOLUTION MIXTURES.

*January 7, 2010*

**8th grade**

The area of a rectangle is 45cm2. The height is one less than two times the base. what is the length of the base

*January 4, 2010*

**Algebra Word Problems**

Children + adult = total receipts $1.00(x) +$3.00(350-x) = $750 solve for x=>>>> number of children tickets, 350- "x" =>>>adult tickets

*December 15, 2009*

**calculus**

Given x+xy+2y^2=6 find the coordinates of all other points on this curve with slope equal to -1/3. Please show work.

*December 10, 2009*

**english**

To what extent is romeo a weak character

*December 9, 2009*

**algebra**

5{[4(n-4)+18]-[3(5n-3)+5]}= simplify the answer

*December 9, 2009*

**Calculus**

Two bacteria colonies are cultivated. The first colony has a doubling time of 2 hours and the second a doubling time of 3 hours. initially, the first colony contains 1,000 bacteria and the second colony 3,000 bacteria. At what time t will sizes of the colonies be equal? Is ...

*December 6, 2009*

**chemistry.**

When 41.81 of a solution of aqueous sliver ions with a concentration of 0.2040 mol dm3 is added to a solution of XO-3/4 ions, 1.172g of the precipitate is formed? ..Can any one help me with that! NB: -3/4 mean that 3 is up and 4 is under it.

*December 3, 2009*

**calc**

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ...

*December 1, 2009*

**calc**

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use a graphical ...

*November 30, 2009*

**Math**

How tall is a cylinder that has a volume o 2,123 cubic meters and a radius of 13 meters?

*November 19, 2009*

**Statistics**

h t t p : / / t i n y u r l . c o m / y f z j y u o I'm not sure how to do #2.

*November 19, 2009*

**Math**

Everyone in Mrs.Bowman's art class has 8 jars of paint except Jerome, who has 10. There are 74 jars of paint in the room. How many students are there in Mrs. Bowman's art class.

*November 17, 2009*

**math**

For fall festival, Mrs. Marco bought 6 bags of Golden Delicious apples. She handed out 43 apples and had 5 left over. How many apples were in each bag.

*November 17, 2009*

**Physics-Astronomy**

A high-velocity star HVS 1 is moving at 600 km/s, 0.2% speed of light. Assuming the HVS 1 is moving away from us, and that its velocity is oriented entirely along our line of sight, determine the Doppler shift of the Ha spectral line (6562.8 Angstrom) produced by this star. Is...

*November 16, 2009*

**Physics-Astronomy**

Hello, I have no idea how to do the following question. Any help would be appreciated: An energy of at least 13.6 electron-volts is required to ionise a hydrogen atom. What is the longest wavelength of electromagnetic wave capable of ionising hydrogen? And which regions of the...

*November 16, 2009*

**Readind and writing number**

I am 55 yr old can get help

*November 12, 2009*

**world history**

my book does not talk about that can you help me with some websites that might help me

*November 11, 2009*

**world history**

thank you :D and what did both countries offer each other

*November 11, 2009*

**world history**

middle ages

*November 11, 2009*

**world history**

how did cultural diffusion occur between Europe and Asia?

*November 11, 2009*

**physics**

2. A rifle is fired horizontally and travels 980 m. The rifle barrel is 6.1 m from the ground. What speed must the bullet have been travelling at? here i got a time of 201.24.. i then added the 980m to the 6.1m and put it in the x=vt equation to get a velocity of 69.49

*November 9, 2009*

**Math**

I need help with this problem. In decimal form, write the ratio of the first 8 consecutive square numbers. 1 squared:2 squared, 2 squared:3squared, 3 squared:4 squared

*November 5, 2009*

**chemistry.**

2.02g of KNO3 ( Mz=101) is dissolved in sufficient water to prepare 0,500 dm3 of solution. What is the concentration of this solution in mol dm?

*November 5, 2009*

**chemistry.**

So what do we have to do in this case?

*November 5, 2009*

**chemistry.**

Which solution contains 0,1 mol of sodium hydroxide? A- 1 cm3 of 0,1 mol dm3 NaOH B 10 cm3 of 0,1 mol dm3 NaOH C 100 cm3################### d 100 cm3 ###################

*November 5, 2009*

**Grammar**

I'd appreciate if you would help with the other questions. Thank you.

*November 4, 2009*

**Grammar**

what is the adjective and adverb in the following sentences? The plane circled the vacant field and slowly came in for a smooth landing. You should not drive too fast; however, a slow driiver can be dangerous too. Mira has been faithfully practicing the cello lately. Luisa ...

*November 4, 2009*

**English**

You have some good ideas however, there are quite a few mistakes. Always build on your topic sentence. Also, be certain to always use your Spell Check. You might want to keep a dictioary handy when writing. Make certain your sentences are a complete thought. Try not to be too ...

*November 4, 2009*

**possessive nouns**

______ stories seemed unbelievable A. Survivors B. Survivor's C. Survivors' D. Surviors's

*November 2, 2009*

**possessive nouns**

Worry haunted the refugee ____ eyes A.childrens B.children's C. childrens'

*November 2, 2009*

**possessive nouns**

Money might be sewn into ____ coat linings. What is the answer A. women's C. Womens'

*November 2, 2009*

**5th grade**

Thats what I had but was not for sure. Thanks!

*November 2, 2009*

**5th grade**

Eight states border one or more of the five Great Lakes. Write a fraction representing the part of the 50 states that border a Great Lake. Write the fraction in simplest form.

*November 2, 2009*

**English A1 Poem**

Can any one help to analysis it.

*October 27, 2009*

**English A1 Poem**

All afternoon my brothers and I have worked in the orchard, Digging this hole, laying you into it, carefully packing the soil. Rain blackened the horizon, but cold winds kept it over the Pacific, And the sky above us stayed the dull gray Of an old year coming to an end. In ...

*October 27, 2009*

**6th grade**

how do you draw a diagram to find the solution to 2.6 devided by 0.4 ,and explain what the quotant means?

*October 25, 2009*

**Calculus**

maximum and minimum of y = cos(x) + sin (x)on the interval [0,2pi]

*October 25, 2009*

**Exponential Decay**

the half-life of carbon-11 is 20 minutes. How long will it btake for 600g of carbon-11 to decay to 30g?

*October 22, 2009*

**The secret of gumbo grove**

oh...im sorry then but thank you for attempting.

*October 20, 2009*

**The secret of gumbo grove**

do you know where i can find chapter summaries for this book.

*October 20, 2009*

**Math**

6/15= 2/5 divide 6 and 15 by 3 15/60=1/4 divide 15 and 60 by 15 78=78 (whole number)

*October 19, 2009*

**Maths**

im not sure im typing as i find them. A=total of counting the numbers 11,22,33,44,55,66,77,88,99,101,202,303 B) = total counting the numbers 11,22,33,44,55,66,77,88,99,101,202,303,404,505,606,707,808,909

*October 19, 2009*

**Maths**

what is a?

*October 19, 2009*

**Grammar**

yes you capitalize it

*October 19, 2009*

**Family Report**

What should i put in a report about my family?

*October 19, 2009*

**guess and check**

there are 42 question on lindas test. sum of the questions are 2 point and sum were 3 points. she got a perfect score. how many 2 question where there and 3 point questions were on lindas test

*October 19, 2009*

**algebra1**

the speed of train A is 8mph slower than the speed of train B. Train A travels 220 in the same time it takes train B to travel 260 miles. Find the speed for each train.

*October 18, 2009*

**6th grade (vocabulary)**

gather

*October 18, 2009*

**summarizing book**

can you summarize the summaries at this link? sparknotes website Search: A wrinkle in time

*October 15, 2009*

**3rd grade**

198+864=1062

*October 14, 2009*

**Math**

I don't think that is right answer is x=4 not sure how

*October 14, 2009*

**Math**

Solve. log(x^3)-log(2)=log(2x^2)

*October 14, 2009*

**math grade 12**

Solve. log(x^3)-log(2)=log(2x^2)

*October 14, 2009*

**arithmetic**

0.031

*October 14, 2009*

**3rd grade math**

write each addition vertically.decide which new groups you will make.then,add to see if you were correct. 256+1273___________ a new ten?____________ a new hundred?_________ a new thousand?____________ need answers and please explain

*October 12, 2009*

**3rd grade**

write addition vertically.decide which new groups you will make.then add to see if you are correct. 256+1273_________ a new ten?________ a new hundred?___________ a new thousand?_________ i need answer and explain how

*October 12, 2009*

**chem**

When 13 grams of a sample cools from 56c to 34.4cit loses 25.8 Joules of heat. What is the specific heat of the sample?

*October 11, 2009*

**physics**

I actually don't know where the 2s and 3m came from, I think it was a typo on my MSWord

*October 10, 2009*

**physics**

A motorist travels at a constant speed of 34.0 m/s through a school zone; exceeding the posted speed limit. A policeman, waits 7.0 s before giving chase at an acceleration of 3.9 m/s2. (a) Find the time required to catch the car, from the instant the car passes the policeman. ...

*October 10, 2009*