Monday

December 22, 2014

December 22, 2014

Total # Posts: 976

**stats**

A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the two balls will be of different colors
*December 18, 2014*

**chemistry**

How much energy (in kilojoules) is needed to heat 4.00g of ice from -11.0∘C to 21.5∘C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K⋅mol) for ice and 75.3 J/(K⋅mol) for liquid water.
*December 13, 2014*

**Physics/Calc**

A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
*December 12, 2014*

**Physics/Calc**

A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
*December 12, 2014*

**MATH!**

the cost of a midnight madness movie ticket, is reduced by 2/5 of the original cost, to a cost of 3/5c. which expression is equivalent to the new cost? A)c-3/5c B)1-3/5c C)1-2/5c D)c-2/5c
*December 10, 2014*

**Algebra**

A fuel storage tank has one supply pump and two identical outlet pumps. With one outlet pump running, the supply pump can increase the fuel level in the storage tank by 8450 gallons in 30 minutes. With both outlet pumps running, the supply pump can increase the fuel level in ...
*November 25, 2014*

**Chemistry**

How do I balance CuSO4 + NH3 + H2O = (NH4)2SO4 + Cu(NH3)4(OH)2 Thank you!!!
*November 24, 2014*

**physics**

consider the 666 N weight held by two cables shown below. The left hand cable and tension 530 N and makes an angle of theta2 with the ceiling. The right hand cable had tension 390 N and makes an angle of theta1 with the ceiling. What is the angle theta1 which the right hand ...
*November 14, 2014*

**Math**

sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly sin(2theta) cos(2theta) tan(2theta) sin(2theta) would it be 2 x (8/17) cos(2theta) would be 2 x (15/17) tan(2theta) would be 2 x (8/17 divided by 15/17) is this correct? I ...
*November 14, 2014*

**Math**

Hi! Could someone possibly help me solve this?; log2(x+4)=log2(x^2+2). For my answer, I got "All Real Numbers" or x=0 but I'm not sure if that's right. Thanks a bunch!
*November 12, 2014*

**Math**

Hi! Could someone possibly help me solve this?; log2(x+4)=log2(x^2+2). For my answer, I got "All Real Numbers" or x=0 but I'm not sure if that's right. Thanks a bunch! :)
*November 11, 2014*

**BTEC Level 3 Business**

I need to find out what information the finance and marketing departments need and use within a business.
*November 10, 2014*

**chemistry**

Nitrogen dioxide abstracts with water vapor to produce oxygen and ammonia gas. If 12.8 grams of nitrogen dioxide reacts with 5.00 liter of water vapor at 375 degrees celisus and 725 tore, how many grams of ammonia can be produced? Use an ice table.
*November 2, 2014*

**chemistry**

give the specific heat for aluminum is 0.900 J/g*c how much energy is required to raise 25.0 g of aluminum from 20.0 to 75.0
*November 2, 2014*

**Physics**

The colors we see when looking at an object depend on the _________. A) density of the object B) amplitude of the light we see C) frequency of the light we see D) mass of the object we are looking at I think it is A
*November 1, 2014*

**physics**

Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not.
*October 24, 2014*

**Language Arts**

Why does the author of "Always to Remember" discuss Maya Ying Lin's background? A. To show that she experienced hardships B. To appeal to Chinese-American readers C. To show its influence on her design D. To show her disintrest in architecture
*October 23, 2014*

**physics**

A rifle with a mass of 12 g, traveling with a speed of 425 m/s strikes a large wooden block, which it penetrates to a depth of 15 cm. determine the magnitude of the retarding force that acts on the bullet.
*October 22, 2014*

**math word problems**

PLEASE HELP MS SUE
*October 22, 2014*

**math word problems **

nilsa is working on a 60 minute math test. there are 20 questions on the test. if it takes her 20 minutes to complete 12 of the questions, what is the greatest amount of time on average she can spend on each of the remaining 8 questions.
*October 22, 2014*

**English**

I need to ask one question... Why Canada involved?
*October 21, 2014*

**English**

he federal government says Canada will start shipping its experimental Ebola vaccine to the World Health Organization on Monday. The government says in a release the Public Health Agency of Canada is supplying the vaccine to the UN body in Geneva in its role as the ...
*October 21, 2014*

**English**

It's like a format for answering short answer/essay questions g- general statement e- elaboration r- reference 1 r- reference 2 c- conclusion
*October 20, 2014*

**English**

I hope someone knows how to write a gerrc paragraph.. Anyways I need help for the reference part. Hence the word R, how do i show my point? I can explain the quote but I don't know the point. The general statement is, the author used a variety of humor to point the nature ...
*October 20, 2014*

**Algebra**

Using Cowling’s Rule what is the age of the child if the adults dose is 500mg and the child dose is 187 mg?
*October 17, 2014*

**Chemist - Grade 9 - Urgent.**

Predict the physical properties and relative reactivity of Ba and Sr Cs and Br ( elements from periodic table )
*October 16, 2014*

**Grade 9 chemsitry**

Please help.. it's urgent.
*October 16, 2014*

**Grade 9 chemsitry**

Predict the physical properties and relative reactivity of Ba and Sr Cs and Br ( elements from periodic table )
*October 16, 2014*

**Sociology**

Which of the following statements would be most likely? 1)Social class is defined by wealth & income alone. 2)Social class includes wealth, prestige,& influence. 3)Social prestige is directly related to economic status. 4)Life chances are equally available to all Americans.
*October 16, 2014*

**immingration & crime**

What impact do increase in immigration have on crime? 1)An increase in both crime and street gang membership 2)A decrease in both crime and street gang membership 3)An increase in crime but not in street gang membership 4)A decrease in crime but an increase in street gang ...
*October 16, 2014*

**Minority Contract**

The Disproportionate Minority Contract (DMC)mainly requires ______________. 1)the office of juvenile justice to rely primarily on self report data 2)each state to challenge inaccurate depictions of crime 3)the Department of Justice to reduce the number of incarcerated ...
*October 16, 2014*

**Drug Law**

The author argues that illegal use of____ highlighted the presence of racial discrimination in the criminal justice system. 1)crack & powder cocaine 2)pot & meth 3)crack & pot 4)pot & heroin
*October 16, 2014*

**Sociology**

Which of the following disadvantages built into the criminal justice system is not class based? 1) Jim Crow laws 2)Visibly crowed residential areas 3)An ability to pay bail 4)Racial profiling is the reason for African American pedestrian stops
*October 16, 2014*

**Grade 9 Chemistry**

which is more reactive k or ca? ( from periodic table.) when poured in water?
*October 14, 2014*

**Chemistry **

Predict the physical properties and relative reactivity of Rb, Cs, and Fr (From the periodic table)
*October 14, 2014*

**math**

1/2X+3=9 solve for x. I'm confused
*October 13, 2014*

**STATS**

In a normal distribution, approximately 34% of the scores are between the mean and +1 SD; an additional 34% of the scores are between the mean and –1 SD. So, in a normal distribution about 68% of the population (a little more than 2/3) will have scores are within 1 SD of ...
*October 11, 2014*

**statistics**

which of the following percentiles corresponds to the area beneath the normal curve from a z score of -1.00 to +1.00 a.98% b.34% c.68% d.100%
*October 10, 2014*

**statistics**

Correction On this semesters final exam, john scored 72 on his calculus exam, (class distribution (u=65, \?=3.57)\) ) and 53 on his statistics exam (class distribution :u=49, ?=2.04. Which exam should he get the better grade. z1=72-65/3.57=1.960 Z2=53-49/2.04=1.960
*October 8, 2014*

**statistics**

On this semesters final exam, john scored 72 on his calculus exam, (class distribution (u=65, \?=3.57)\) ) and 53 on his statistics exam (class distribution :u=49, ?=2.04. Which exam should he get the better grade. z1=72-65/3.57=1.960 Z2=53-49/3.57=1.120
*October 8, 2014*

**Statistics**

On this semesters final exam, john scored 72 on his calculus exam, (class distribution (u=65, \σ=3.57)\) ) and 53 on his statistics exam (class distribution :u=49, σ=2.04. Which exam should he get the better grade. z1=72-65/3.57=1.960 Z2=53-49/3.57=1.120
*October 7, 2014*

**Math**

Oh thanks
*October 7, 2014*

**Math**

Also how did it become 8 15/16? Wouldnt it become 8 14/16?
*October 7, 2014*

**Math**

Thanks ! :)
*October 7, 2014*

**Math**

Why did you change it to 44 24/16 If i may ask?
*October 7, 2014*

**Math**

At the back of the book it said it was 36 9/16
*October 7, 2014*

**Math**

A piece of wood is 8 and 7/8 in. long is cut a piece 45 1/2 in. long. If 1/16 is wasted for the cut, how much wood is left.
*October 7, 2014*

**statistics**

On this semester’s final exam, Susie scored 72 on her classics exam (class distribution: μ = 65, σ = 3.57) and 53 on her psychology exam (class distribution: μ = 49, σ = 2.04). For which exam should Susie expect the better grade? a. Classics b. ...
*October 7, 2014*

**Geography**

What do countries with large footprints have in common? Small footprints? I don't really understand .
*October 6, 2014*

**math**

Why is 5 to the negative 4 power= 1/5 to the fourth power?
*October 6, 2014*

**English.**

What is another strong way of saying : Yes, I would recommend this book to a friend.
*October 5, 2014*

**Math 2--questions**

6. 470
*September 27, 2014*

**Math 2--questions**

7. Find the sum. –14 + 7 + (–3) –24 –18 –10 *** –4 8. A scuba diver descends 350 feet and then another 120 feet. Express the diver’s final depth as an integer. –420 ft 420 ft ** –470 ft 470 ft
*September 27, 2014*

**Check my answers? Math help.**

Sorry. I left out an ption D on #4. Would the answer be 11? on four? 5. C or B?
*September 27, 2014*

**Check my answers? Math help.**

2. Write an integer to represent owing your friend $10. –10 *** –2 2 10 3. Write the sum as a product, then simplify the product. (–8) + (–8) + (–8) + (–8) ( 2(–8) + 2(–8) = –30 4(–8) = –32 **** 4(–8) = 32 5(–8...
*September 27, 2014*

**Science**

how did you get that? please explain as well. I'd appreciate it
*September 23, 2014*

**Science**

A piece of aluminum has a mass of 39.15g and a volume of 14.5cm cube. Determine the density of the aluminum. What would the density be of a much larger piece of aluminum? explain. I established the density of the al. is 2.7g/ cm cube. I dont get the second part of the question?
*September 23, 2014*

**Math**

5y^3 ( -x^4) When x is -2 and y is -1
*September 23, 2014*

**Geography / English**

So I would say ; Continents like Africa has lessened lives due to poor medical care and services compared to Canada ? I dont know if it was connected to the importance of the evidence.
*September 18, 2014*

**Geography / English**

So I have to write an essay how do i rate canada when compared to the rest of the world. On the sheet it shows you a set up on how to write it Introductory Sentence/ Thesis -In my opinion, canada is favourable compared to the rest of the world. Supporting Evidence - Canada ...
*September 18, 2014*

**Geography**

How would you rate Canada when compared to the rest of the world? Concepts like Primary School Enrollment, Life Expectancy, Population, GDP, HDI and etc;
*September 18, 2014*

**Appreciation**

I'm glad you do. :)
*September 17, 2014*

**Appreciation **

Hi Ms.Sue. I know this isnt a question but I want to thank you for helping me with questions I couldn't understand.
*September 17, 2014*

**Algebra 1**

find the product (2x+1)(2x-1)
*September 17, 2014*

**Geography**

What can we infer about a country based on its GDP? Why is the HDI a better way to compare countries than other indicators above e.g gdp, primary school enrollement etc;
*September 16, 2014*

**Grade 9 Science**

In each situation s below , it seems that a new substance may have been produced. Explain why each situation represents a physical change. a) A tailor makes a new suit out of a piece of fabric. b) A chef makes a salad out of lettuce, tomatoes and cucumbers. I really need ...
*September 14, 2014*

**Science**

So what would you find something in the house? Product Symbols Precaution One example would be appreciated
*September 11, 2014*

**math 12**

$identical\:squares\:are\:cut\:from\:each\:corner\:of\:a\:rectangular\:piece\:of\:cardboard,\:7\:cm\:by\:10\:cm.\:The\:sides\:are\:then\:folded\:up\:to\:make\:a\:box\:with\:an\:open\:top.\:If\:the\:volume\:of\:the\:box\:is\:25\:cubic\:centimeter,\:how\:long\:is\:the\:side\:of...
*September 10, 2014*

**French**

How do I say : I am going to wait for my friend to come? I am very stumped at this one.
*September 9, 2014*

**French**

Oh no I meant it to be seperate. My teacher said I have to make the sentence in present so would it be a) Je fini mon travail b) Je attends pour mon ami a venir?
*September 9, 2014*

**French**

How do you say I finish my chores and I wait for my friend to come?
*September 9, 2014*

**French **

How do you say. We sing at the concert? No google translate please..
*September 9, 2014*

**Math**

Oh okay thank you and I'm not suppose to use a calculator when doing this.
*September 9, 2014*

**Math**

Can someone tell me why 9-4^2 = -7?
*September 9, 2014*

**Math - Urgent**

Thank you both.
*September 8, 2014*

**Math - Urgent**

18?
*September 8, 2014*

**Math - Urgent**

I'm sorry I need 1 more question to be asked. Use the LCD to write equivalent fractions. 5/6 , 2/9
*September 8, 2014*

**Math - Very urgent.**

Thank You !
*September 8, 2014*

**Math - Very urgent.**

They said it's prime numbers though?
*September 8, 2014*

**Math - Very urgent.**

Use prime factors to find the LCD for each pair of fractions. a) 1/4, 1/8 b)1/6, 1/18
*September 8, 2014*

**Math - Very urgent.**

a) The lowest common denominator would be 6? b) Would the lcd be 20?
*September 8, 2014*

**Math - Very urgent.**

Use multiples to find the LCD for each pair of fractions. a) 1/2, 1/3 b) 1/4, 1/5
*September 8, 2014*

**Math - Urgent**

Thank you :)
*September 7, 2014*

**Math - Urgent**

Determine how each multiplication or division pattern is formed. Then write the next two numbers a) 81, -27, 9 ... b) 5, -20, 80...
*September 7, 2014*

**Geography**

Writeacher sorry to bother you but can you help me?
*September 7, 2014*

**Geography**

Okay so I got the capitals down but how do I know which one is the major city. Sorry to be a bothersome.
*September 7, 2014*

**Geography**

What is/are the major cities of Canada? Im confused when it ask for the capital and major cities.
*September 7, 2014*

**physics**

Two boat landings are 3.0 km apart on the same bank of a stream that flows at 1.6 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water? How do I factor in the fact that velocity is subtracted by 1.6 ...
*August 10, 2014*

**math**

for partial fractions dont you do A/(v+2) + B/ (v-1) = (v+2)(v-1)? how do you go from there? can you show what you did step by step?
*July 12, 2014*

**math**

how do you go from dv/(v+2)(v-1) to -(1/3)/(v+2) + (1/3)/(v-1) dv?
*July 12, 2014*

**science**

and how does it go from there to this In the near-Earth orbit the rate of change of momentum is (v/R)p = (v/R)mv toward the center of the Earth, and this must equal the gravitational force GMm/R2, so mv2/R = GMm/R2, and mv2 = GMm/R. Therefore in this orbit K+U = (1/2)mv2 - GMm...
*July 11, 2014*

**science**

how is this equation derived from the momentum principle? In the near-Earth orbit the rate of change of momentum is (v/R)p = (v/R)mv
*July 11, 2014*

**physics**

if a bird is sitting on a seat in a plane that is travelling 300 km/h[E], if the bird jumps for a couple seconds will he: land on the front of the bus, back of the bus, one seat ahead, one seat behind, on the same seat he was standing on
*June 20, 2014*

**physics**

In space, an object has only ONE force acting on it. Can the object have constant acceleration and/or a velocity of 0. Explain.
*June 20, 2014*

**physics**

In a vacuum, a stone and feather fall at the same time. Can you make the assumption that the acceleration of gravity acting on both objects is the same? Explain.
*June 20, 2014*

**Chemistry**

Yesterday we combined Hydrochloric Acid HCl with Sodium Hydroxide NaOH in a violent reaction that resulted in water H2O and common table salt NaCl. How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll ...
*June 19, 2014*

**Chemistry**

How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation.
*June 19, 2014*

**English**

Crazy Teens: Are They Taking Over the World?
*June 11, 2014*

**Math**

Alex's distance form home is represented by the equation D= -0.5t +300 D represents his distance from home and t represents time in minutes How long will it take Alex to reach a distance of 182 km from home
*June 9, 2014*

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