Monday

September 22, 2014

September 22, 2014

Total # Posts: 710

**phoenix**

Each sample has n= 5 scores with s2 =38 for the first sample and s2 = 42 for the second. (Note: Because the two samples are the same size, the pooled variance is equal to the average of the two sample variances.)calculate how much difference should be expected, on average, ...
*May 12, 2013*

**math**

a bag contains 3 blue marbles , and 9 green marbles , and 11 yellow marbles . Twice you draw a marble and replace it . Find P(blue then green) a) 27/529 b) 27/23 c) 15/529 d) 12/23
*May 9, 2013*

**math**

Which is the best display for the set of the number of tornadoes in the United States each year , If you want to be able to identify the mode? a) histogram with intervals of b) frequency table with intervals of 3 c) line pot d) line graph
*May 6, 2013*

**Math**

thanks
*May 6, 2013*

**Math**

help please !!!!!!!!!
*May 6, 2013*

**Math**

A researcher tagged 40 giant turtles in 2008. In 2009 , she returned and captured 50 turtles , 16 of which were tagged. In 2010 , she returned again and captured 30 turtles , 8 of which were tagged. a) Use a proportion to estimate the turtle population for 2009. b) Use a ...
*May 6, 2013*

**Math**

help please !!!!!!!
*May 6, 2013*

**Algebra **

a cyclist and a horse rider are going the same speed. the rider stops after 11.1 miles. the cyclist goes for another hour and 18.5 miles. how fast is each one going?
*April 17, 2013*

**Math**

pedro and maria spend the same amount of time driving to school. pedr average is 50 mph and maria's average is 30 mph. pedro drives 10 miles farther than maria, how long does each drive to school?
*April 17, 2013*

**PHYSICS - Waves**

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. If 3 sound waves pass a microphone in 4.0 s while traveling 5.0 m/s, what is the wavelength of the waves? (6.67 m)
*April 9, 2013*

**PHYSICS - Waves**

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. It takes 2.30 s for an echo to come back from a sound wave sent to the bottom of a 25 degree C lake. How deep is the lake at this ...
*April 9, 2013*

**PHYSICS - Waves**

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. Sound waves with a wavelength of 2.5 m are traveling 7.5 m/s. How many waves will pass a microphone in 10.0 s? (Answer 30 waves)
*April 9, 2013*

**science**

if a ball that has a density of 1.17 g cm3 placed in the beaker, where will the ball come to rest
*April 2, 2013*

**kernersville**

A horse a dog a chicken anved a duck lived on a farm.How many legs were on the farm.
*March 21, 2013*

**Matt**

You randomly draw a marble from a bag of 320 marbles. You record its color and replace it. Use the results shown in the table to predict the number of marbles in the bag that are the given color. Blue:10 Green:8 Purple:2
*February 28, 2013*

**Math**

The javelin event is held on the field inside the track. This field is a rectangle measuring 100 meters by 64 meters, with a semicircle at each end. Early modern Olympic javelins were designed so well that javelin throwers could throw them beyond the field and onto the track. ...
*February 18, 2013*

**Chemistry**

58% Ca3 (PO4) 2 how many phosphorus are in 10 kg bones?
*February 17, 2013*

**Chemistry**

58% Ca3 (PO4) 2 how many phosphorus are in 10 kg bones? Ca3(po4)2+SiO2+C=CaSiO3+P4
*February 17, 2013*

**chemistry**

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?
*February 13, 2013*

**math**

No. Two rays can be parallel and so would never form an angle.
*February 5, 2013*

**math**

Solve the following systems of equations. 3x + 4y = 4 2x + y = 6
*February 5, 2013*

**math**

The sunshine bakery sells pies at a fixed price o p dollars per pie. The total number of pies demanded daily, D, is related to the price, p, in dollars by the equation: D = -10p + 200 On the other hand, the daily supply of pies, S, is related to the price, p, per pie by the ...
*February 5, 2013*

**Criminal Justice**

i just need help trying to find the answers for it. Ive tried looking and kind find it. :/
*February 1, 2013*

**Criminal Justice**

A 1-page outline on the best way to format and present the federal criminal pretrial process, which includes jury selection, evidence and jury instructions. Please provide examples in your outline of your recommended format for presenting the process. A 1-page draft of how to ...
*February 1, 2013*

**Accounting/Office admin**

It is the beginning of a new year and you just received the landlord’s building expense pass through reconciliation for the previous year. Assuming the math is correct, what are the two most important things to look for?
*November 24, 2012*

**AP World History**

What were some complexities of trade in Post Classical world and how it is similar and or different to today?
*November 24, 2012*

**AP World History**

No, this is my question. What were some complexities of trade in Post Classical world and how it is similar and or different to today?
*November 23, 2012*

**AP World History**

Describe the complexities of trade in Post-Classical world and compare to today.
*November 23, 2012*

**Chemestry**

If 0.25 mol of methane gas (CH4) is introduced into evacuated 2.00 L container at 35 Degrees Celcius , what is the pressure in the container ?
*November 17, 2012*

**Chemestry**

If 0.25 mol of methane gas (CH4) is introduced into evacuated 2.00 L container at 35 Degrees Celcius , what is the pressure in the container ?
*November 17, 2012*

**Chemistry**

Calculate the enthalpy of combustion for acetic acid using standard enthalpies of formation.
*November 12, 2012*

**Physics**

Hey this is what I did: T=Ia a= T/I then divide a/precessing velocity and that is the answer
*November 9, 2012*

**psych**

an IQ test is given on a tuesday, when given the test again on thurs the child scores differently, this is an issue of what? function, reliablity, observation or reflection?
*November 3, 2012*

**Math**

Two cards are drawn in succession without replacement from a standard deck of 52 cards. What is the probability that the first card is a face card (jack, queen, or king) given that the second card is an ace? (Round your answer to three decimal places.)
*October 17, 2012*

**maath**

The accompanying tree diagram represents a two-stage experiment. (Let x = 0.45, y = 0.55, r = 0.65, s = 0.35, t = 0.4, and w = 0.6.) Use the diagram to find the following probabilities. (Round your answers to three decimal places.) (a) Find P(A) · P(D | A). (b) Find P(B...
*October 17, 2012*

**Math**

Two cards are drawn in succession without replacement from a standard deck of 52 cards. What is the probability that the first card is a spade given that the second card is a club? (Round your answer to three decimal places.)
*October 17, 2012*

**statistics**

A researcher wishes to estimate with 95% confidence the proportion of adults who have high speed internet access. Her estimate must be accurate within 4% of the true proportion. 1. Find the minimum sample size needed using a prior study that found that 48% of the respondents ...
*October 14, 2012*

**chemistry**

Aluminum metal is exposed to atmospheric oxygen, it is oxidized to form aluminum oxide. How much heat is released by the complete oxidation of 24.2 grams of aluminium at 25°C and 1atm.
*October 13, 2012*

**7th grade math**

How do you arrange the numbers 2 4 5 and 6 ans insert the symbols "-" and "x" in a way that u follow PEMDAS/ order of operations to get the answer 8
*September 20, 2012*

**geometry**

(x+20)(x+10)(y-40)
*September 16, 2012*

**geometry**

find the value of each variable (6y-16) (4y+6)
*September 16, 2012*

**geometry**

whats the value of each variable (7x-27)(4x+12)
*September 16, 2012*

**AP World History**

There is a word that my worksheet is saying to define, the word is Chavin. I looked through my textbook, but I can't find the definition. What I am learning now is agricultural development and the earliest civilizations. Can you please give me a definition for Chavin?
*August 29, 2012*

**cars**

A ruling of the FTC requires that every used car must display a(n) ________ spelling out the warranty terms under which the vehicle is offered for sale. A. vehicle identification chart B. agreement C. option chart D. buyer's guide I have no idea what it is. HELP
*August 23, 2012*

**math**

joanne picked 15 more than twice as many apples as her sister. Her sister picked 35 apples.
*August 18, 2012*

**Chemistry**

It is C.
*August 18, 2012*

**HEALTH**

idkk i need help with this one too!
*August 13, 2012*

**ap world history**

I mean coke as in coca cola
*August 4, 2012*

**ap world history**

how did coke become basically seen as an american value? how did this help and hurt coke (and in some ways, america itself?)
*August 4, 2012*

**ap world history**

how was tea connected to the opium trade and the opium war of 1839-1842?
*August 3, 2012*

**AP World History**

Hi its Diana with the same question: How did coffee play a pivotal role in the French Revolution? (lots of details and go into the Enlightenment) But, I looked at the articles you sent me and I still dont understand how coffee influenced the Enlightenment. I am having so much ...
*August 3, 2012*

**AP World History**

How did coffee play a pivotal role in the French Revolution? (lots of details and go into the Enlightenment)
*August 3, 2012*

**AP World History**

Why were spirits an important staple in Colonial America?
*August 2, 2012*

**chemistry**

what the rules to be followed in performing he 4 fundamental operaions using scientific notation?
*June 15, 2012*

**Math or geometry **

7c-4x+45
*June 8, 2012*

**algebra2**

An ice-cream parlor sells sundaes with 3 different types of ice-cream and 4 different toppings. They have 8 flavors of ice-cream and 10 toppings for their customers to chose from. What is the probability that a customer orders a sundae including the toppings of whipped cream, ...
*May 26, 2012*

**isep - fisica**

b) quantidade de acelaracao no ponto b. o ponto b é um cursor que esta preso no cimo de uma barra que esta dentro de outra barra . como e que calculo a quantidade de acelaracao neste caso uma vez que ha acelaracao de coriolis
*May 22, 2012*

**history**

Which is NOT true of the segregation laws passed after the Civil War?
*May 22, 2012*

**history**

Philadelphia, Pennsylvania was NOT _____.
*May 22, 2012*

**Polynomials. :) :)**

f(x)=2x^4+4x^3-7x^2-x+7 has no rational roots. Approximate the irrational solutions correct to 3 decimals. If there is more than 1 real solution, enter them from smallest to largest, separated by a comma
*May 17, 2012*

**Polynomials. :) :)**

2x^4+4x^3-7x^2-x+7 Approximate the irrational solutions correct to 3 decimals. If there is more than 1 real solution, enter them from smallest to largest, separated by a comma.
*May 17, 2012*

**Government**

Las Vegas uses a council-manager style government?
*May 14, 2012*

**Government**

Las Vegas uses a council-manager style government
*May 10, 2012*

**accounting**

Question: Because Aqua Elite, Inc. is a new startup business, the beginning balances in all the general ledger accounts are zero to start. n The length of the accounting periods are three months using a fiscal calendar year. (A fiscal calendar is on a yearly basis other than a...
*April 16, 2012*

**Math**

Tasha saw a sailboat while walking along the pier. She thinks it is the tallest sailboat she has ever seen. The shadow cast by the boat was 14 ft long, while Tasha's shadow was only 2 ft long. If Tasha is 5.5 ft tall, how tall was the sailboat, in feet?
*April 10, 2012*

**math**

9y squared + 48 - 36
*April 1, 2012*

**Math**

If events A and B are independent and P(A) and P(B) are nonzero, explain why P(A U B) does not equal P(A)+ P(B) im not sure how to answer this
*March 25, 2012*

**Trigonometry **

Your altitude is 40,000 feet and you detect a target at a depression angle of 6 degrees and a range of 20 miles. what is the altitude of the target? Draw a picture.
*March 11, 2012*

**Math**

Simplify (x^1y^1)^5
*March 8, 2012*

**Math**

Simplify z-4
*March 8, 2012*

**Algebra**

Thanks
*March 8, 2012*

**Algebra**

combine like terms (simplify) 11/14a-1/15b+1/14a-11/15b
*March 8, 2012*

**Math**

Classify the given number. - 4/9
*March 7, 2012*

**Math**

find the value of expression. 3*45/9-2(10-)-4/2
*March 7, 2012*

**Geometry**

find the perimeter of the trapezoid. L1=9.65yd, L2=9.25yd, L3=10.12yd, L4=6.20yd
*March 7, 2012*

**Geometry**

Can you please explain?
*March 7, 2012*

**Math**

28.26 yd squared
*March 7, 2012*

**Math**

178.3 ydd3
*March 7, 2012*

**Mangerial Economics**

Where Q is the number of cans of tennis balls sold quarterly, P is the wholesale price Wilpen charges for a can of tennis balls, M is the consumers average household income, and Pr is the average price of tennis rackets. The regression results are as follows Dependant Variable...
*March 2, 2012*

**Business English**

Which of the following sentences advocates an idea in a positive way? A. I can't see anyone buying the product at that price. B. The unit is way overpriced. C. Customers can get a better deal anywhere else. D. We can corner the market if we discount the selling price just 5%.
*March 2, 2012*

**math**

also a problem that i cant figure out is how to do inverses of logs f(x)= 2log(base2)X
*March 2, 2012*

**Math**

3ln(b) + 2ln(c) write as a single log. I have tried this problem so many ways. i dont know what to do with the 3 and the 2. do you multiply or use them as exponents or what
*March 2, 2012*

**English**

I want to delete this :S
*March 1, 2012*

**English**

What do you think about my essay? "A little bit longer and I will be fine" “..And you do not know what you got until it is gone, and you do not know what i s like to feel so low...” A quote written by Nick Jonas to express how he felt after being diagnosed ...
*March 1, 2012*

**algebra. help!!**

how do u get 2t?
*February 27, 2012*

**Algebra**

x^2–4 ÷ x^2+5x+6 ____________ ______________ x^2 + 3x – 10 x^2 + 8x + 15
*February 25, 2012*

**Algebra**

Thank you Steve.
*February 19, 2012*

**Algebra**

Factor 12x^2(x-1)-4x(x-1)-5(x-1) and show work.
*February 19, 2012*

**math**

to solve this problem, you would simply add the exponent of 13 from both tens since you are multiplying the exponents together. the answer would be 10 to the 26th power.
*February 17, 2012*

**Math**

Thanks a bunch
*February 17, 2012*

**Math **

Find an equation of the line containing the points (-6,19) and (-15,28)
*February 17, 2012*

**math**

If y=8(5)^x then write ln y as a linear function of x I dont know how to do this.??
*February 15, 2012*

**algebra**

because, x2 - x1 will always equal zero and you cant divide a number by 0
*February 15, 2012*

**math**

about 2826....
*February 15, 2012*

**Math**

what do you do when you have log on the side with y. for example logy= .120387x + .4771 How do you solve for y?
*February 13, 2012*

**algebra**

Find all integers b so that the trinomial 3x^2 +bx + 2 can be factored.
*February 11, 2012*

**math**

i had cards to write, i wrote 1 third of cards on monday, 2 eighths on tuesday, 1 sixth on wednesday and wrote the remaining 27 cards on thursday. how many cards did i write?
*January 30, 2012*

**math**

what would be the numerator of a fraction that is equivalent to 5/8 and has a denominator of 48?
*January 26, 2012*

**chemistry**

Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
*January 22, 2012*

**Chemistry**

A sample of Manganese (II) Chloride has a mass of 19.8 grams before heating, and 12.6 grams after heating until all the water is driven out. Based on this information, how many water molecules were attached to each molecule of Manganese (II) Chloride?
*January 22, 2012*

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