Sunday

February 14, 2016
Total # Posts: 1,730

**probability!**

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that ...
*October 21, 2010*

**PROB**

Researchers at the University of Pennsylvania School of Medicine have determined that children under 2 years old who sleep with the lights on have a 36% chance of becoming myopic before they turn 16. Children who sleep in darkness have a 21% chance of becoming myopic before ...
*October 19, 2010*

**probability!**

so i am asked to find the prob of a male professor - given that he is promoted. and the stats are female promoted = 3% female not promoted - 12% male promoted 17% male not promoted - 68% and i just wrote down that it is 17% is this true? ALso, i looked up in my book that P(A I...
*October 19, 2010*

**physics**

A 56 cm diameter wheel accelerates uniformly about its center from 130 rpm to 400 rpm in 3.2 s. (a) Determine its angular acceleration. Express your answer using two significant figures. (b) Determine the radial component of the linear acceleration of a point on the edge of ...
*October 18, 2010*

**Physics**

A 1.80 kg block slides on a frictionless horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.0 cm before coming to rest. What is the force constant of the spring?
*October 17, 2010*

**math**

solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations 3x-y=-4 2x-y=0
*October 16, 2010*

**math**

find the equation of a line that passes through the origin and point (-3,6)
*October 16, 2010*

**math**

about 7/10 of u.s. population in 1991 saying a to be true. What was the total popuation?
*October 15, 2010*

**Organic Chemistry**

What Happens when (z)-2-pentene reacts with Cl2 and H2o?
*October 14, 2010*

**PHYSICS ---HELP!**

The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?
*October 11, 2010*

**physics**

Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two masses? Take the ...
*October 11, 2010*

**english**

Okay I figured out my question that I posted before. But can you please explain to me what this means? Style is not applied to writing. It is the writing. I don't understand what that means. Thank You
*October 9, 2010*

**English Ms. Sue**

I would like to know how I could write this in my own words. I wondering if you could help me out because I don't know what to put. Thank you and enjoy the rest of your weekend. Style is known for being the literary element that makes language memorable. Style is basically...
*October 9, 2010*

**english**

All four of them???
*October 8, 2010*

**english**

Are all these examples of Imagery. Yes or No.. Thank You for your help. I think that they all are. But not to sure. She smiled a little through her face was drawn with pain and she bit her lip the smile fading. We got there quite quickly even though it was still so dark and it...
*October 8, 2010*

**Organic Chemistry**

Determine bond length and bond strength? The picture of the problem is shown here: oi52[insert dot]tinypic[insert dot]com/jfgnb6[insert dot]jpg I got the following: I think that the strongest bond is the triple bond (A). I think that the shortest bond is also the triple bond (...
*October 3, 2010*

**chemistry**

2 solids samples each contain sulfer, oxyegen, and sodium only. These samples have the same color, melting point, density, and reaction with an aqueous barium solution. Are they solutions?
*October 2, 2010*

**Geography**

In simple terms can you please explain to me what free market capitalism means? All the definitions are confusing and I don't understand them. Thank you for your help.
*October 1, 2010*

**Geography**

Western civilization is characterized by the beliefs that the individual is in control of their environment and is responsible to improve it for themselves and family. Where do these beliefs come from?
*October 1, 2010*

**earth**

If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out. -Lauren
*September 29, 2010*

**Math**

How would you solve -9+x = x/8 -23 ?
*September 27, 2010*

**Math**

How do you solve 1/3x-6 = 9+2/3x Please help!
*September 27, 2010*

**Math**

Can you please explain what the quad formula is?
*September 27, 2010*

**Math**

-9+x = x/8 -23
*September 27, 2010*

**Science**

Make the necessary conversions between ordinary decimal form and standard exponential notation. a) 56934 = ?
*September 26, 2010*

**Literature**

In emphasizing the importance of individual thinking and basing one's beliefs on one's own experiences, Sujourner shows she has much in common with
*September 22, 2010*

**Statistics**

how do it on paper and pencil?
*September 20, 2010*

**Statistics**

The amt of time cold sufferes will experience symptoms is normally distributed wiht a mean of 7.5 days and a standard deviation of 1.2 days what proportion of sufferers will experience in LESS THAN 4 days , also what proportion will experience sympotms for 7-10 days How do you...
*September 20, 2010*

**social studies**

How many people lived on the north american continent before european settlement?
*September 19, 2010*

**science**

How many people lived on the north american continent before european settlement?
*September 19, 2010*

**Internal Assessment Topic**

I have to come up with an Internal Assessment topic for history, and I want something that focuses on Trotsky, but I'm having trouble thinking of a good topic. I would've liked to compare the roles of Trotsky and Lennin in the October Revolution, but my friend has ...
*September 14, 2010*

**20th Century World History**

I have to come up with an Internal Assessment topic for history, and I want something that focuses on Trotsky, but I'm having trouble thinking of a good topic. I would've liked to compare the roles of Trotsky and Lennin in the October Revolution, but my friend has ...
*September 14, 2010*

**chemistry**

how many moles of solute is present in 40.0mL of 1.000 M of HNO3
*September 14, 2010*

**Pre Calc**

the 1 is over k(k+1), and the A is over k, and the B is over k+1
*September 12, 2010*

**Pre Calc**

Solve for A and B if: 1 A B ----- = --- + --- k(k+1) k k+1
*September 12, 2010*

**Pre Calc**

Determine K: a:12! -- =k 10! b:65!+64!+63!=k^2*963! c:(k+5)!=(k^2+196)(k+3)!
*September 12, 2010*

**Pre Calc**

Determine K: a:12! b:65!+64!+63!=k^2*963! -- =k 10! c:(k+5)!=(k^2+196)(k+3)!
*September 12, 2010*

**english**

dissect sentence To sail around the world has always been my life-long dream
*September 12, 2010*

**9th grade english**

need help dissecting five sentences for parts of speech and sentence 1) Following too closely behind a car can be dangerous
*September 12, 2010*

**spanish**

Muchas gracias! :)
*September 12, 2010*

**spanish**

When one is referencing mood, I know estar is generally used because states of mood are temporary. In the following sentence, though, it seems like ser might be more appropriate, at least for the first part, because "siempre" indicates the mood is permanent. In the ...
*September 12, 2010*

**math**

find p from the formula I=prt/100 when i=20, r=5 and t=4
*September 5, 2010*

**Chemistry**

1.25 x10^-5g/ 0.75 moles = Not sure what the ^ stands for
*August 31, 2010*

**geometry**

IF a quadrilateral EPIC is a rectangle what are the slopes of the other 3 segments?
*August 30, 2010*

**science**

The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water: 2C2H2 (g) + 5O2 (g) ¨ 4CO2 (g) + 2H2O (l) The value of ƒ¢So for this reaction is __________ J/K.
*August 1, 2010*

**AP Physics**

i'm in ap physics too and we do WAY more complicated stuff than that.
*August 1, 2010*

**Calculus**

How do you factor (x^2+1)^(1/2)*(x^2-1)+((x^2+1)^(3))^(1/2)*(2x^2-2)?
*July 3, 2010*

**math 6th grade**

what i ended up getting is 2.25 feet and 0.75 yards
*June 29, 2010*

**math 6th grade**

i think the answer is 5 feet
*June 29, 2010*

**math 6th grade**

20
*June 29, 2010*

**math 6th grade**

You have 15 yards of ribbon for your gift boxes. each box gets the same amount of ribbon. How much ribbon will each box get
*June 29, 2010*

**English 1 **

Please Help. I have read it over but have no clue
*June 23, 2010*

**English 1 **

Which of the following statements, all spoken by Frank, BEST describes Frank's character? This is from the play, "Thunder on Sycamore street." Choose what you believe is the strongest response to this question. Write the letter of the answer you choose and ...
*June 23, 2010*

**algebra 1**

but its a multiple choice and it doesnt have that as one of the choices...
*June 17, 2010*

**algebra 1**

the question is: What is the sum of 5 radical 7 and 3 radical 8? i dont understand how to solve this because i cant pull out a perfect square
*June 17, 2010*

**statistiss**

you need the table in order to do the question.
*June 17, 2010*

**Chemistry**

the answer is 6.20 L
*June 5, 2010*

**Chemistry**

its 6.20 L
*June 5, 2010*

**algebra**

yOUR BROTHER TRAVELED 117 MILES IN 2.25 HOURS TO COME HOME FOR SCHOOL BREAK. wHAT'S THE AVERAGE SPEED THAT HE WAS TRAVELING?
*June 3, 2010*

**math**

52 i think
*June 3, 2010*

**math**

I got 0.01923077
*June 3, 2010*

**math**

thank you i will
*June 3, 2010*

**math**

2.25 divided by 117 is 2 by 10 is 5 and I am cinfused now
*June 3, 2010*

**math**

13 miles per mile I THINK
*June 3, 2010*

**math**

YOur brother traveled 117 miles in 2.25 hours to come home for school break. What's the average speed he was taveling
*June 3, 2010*

**EDU**

she is right
*June 3, 2010*

**english**

It is a correct runon sentance, congrats
*June 3, 2010*

**WRITING**

Some say that texting on a cell phone is a bad thing for students focus, but their is a simple thing we can do is by having the teachers go around the classroom to see if students are texting. how can i fix this run-on sentence
*May 25, 2010*

**chem help!!**

i am talking about nails..nails that have iron in them
*May 25, 2010*

**chem help!!**

What effect does bending, stress, or machining have on the tendency of iron to corrode?
*May 25, 2010*

**Chemistry**

The problem on my homework is: What mass in grams of iron metal is required to react with 2.50 L of .1500 M of sulfuric acid to produce 18.35g of iron (III) sulfate? please help!
*May 23, 2010*

**language arts**

Is it... a lyric poem??
*May 13, 2010*

**language arts**

What kind of poem is "Solitude" by Ella Wheeler Wilcox? (lyric, ode, haiku, etc.)
*May 13, 2010*

**math**

How do I figure out what the nth term is in a sequence? Exmaple: 1, 3, 5,7, What would be the 100th term? IF adding 2 to each would the formula be n+2? How to calculate 100th term?
*May 9, 2010*

**math**

A person writing a book numbered the pages consecutively starting with 1 and had written 4553 digits. how many pages had she numbered?
*May 7, 2010*

**WRITING(POEMS)**

IS BUTTERYNESS SPELLED LIKE THIS BECAUSE SPELL CHECK IS NOT PICKING IT UP .
*May 5, 2010*

**Math**

1/6 of 18 =3 so shirley has 3 quarters =75 cents 1/3 of 18=6 so shirley has 6 dimes =60 cents and 1/2 of 18=9 so shirley has 9 nickels= 45 cents 75+60+45=180 cents
*May 3, 2010*

**physics**

"An adiabatic process is a process in which no heat is transferred. This can happen if the process happens so quickly that there is no time to transfer heat, or if the system is very well insulated from its surroundings. " im not sure what the question means...either...
*May 3, 2010*

**algebra II-URGENT**

P=2l+2w 270=2(w+25)+2w 270=2w+50+2w 220=4w 55=w so l=w+25 =55+25 =80 Check P=2l+2w 270=2(80)+2(55) 270=160+110 270=270
*May 3, 2010*

**Math**

Im not sure by your equation why you are to follow that process, but if you are to first square the two numbers then you get rid of the -ve ie: 567.2^2 and (-459.6)^2 i hope this helps
*May 3, 2010*

**Algebra II**

85=(88+83+75+80+x)/5 85(5)=88+83+75+80+x 425-326=x 99=x
*May 3, 2010*

**algebra**

-8x-3y=2 -3y=2-8x y=(8/3)x+2 so the slope of the given line is 8/3 and since the line is parallel, it will have the same slope. now we can use the given point to solve for b y=mx+b y=(8/3)x+b -4=(8/3)(6)+b 12=b
*May 2, 2010*

**calc**

the tangent line to the graph of y=sin x at the point (2pi/3, (radical 3)/2) crosses the sine graph at the point where x=?
*May 2, 2010*

**Math**

m=y2-y1/x2-x1 =(-3)-(-6)/1-(-5) =3/6 =1/2 y=mx+b y=1/2x+b now use either of the points to solve for b -3=1/2(1)+b -3-1/2=b 2.5=b so y=0.5x+2.5
*May 2, 2010*

**math**

The volume of a pyramid is V=1/3Bh where B is the area of the base and h the height from the base to the apex. This works for any location of the apex, provided that h is measured as the perpendicular distance from the plane which contains the base. so yes, this statement is ...
*May 2, 2010*

**Math**

Divide and Simplify: y^2-25/7 divided by 7y+35/49
*May 2, 2010*

**Math**

Divide and Simplify: y^2-25/7 divided by 7y+35/49
*May 2, 2010*

**Math**

Multiply and Simplify: Can you please show me the steps on how you get the answer. Thank You 2/4n+6 times n^2+2n-3/n+1
*May 2, 2010*

**MATH**

can someone explain how an quadratic equation with factoring and give an example,PLEASE!
*May 1, 2010*

**MATH**

can someone explain how an quadratic equation with factoring and give an example,PLEASE!
*May 1, 2010*

**Food Chemistry**

Calculate the amounts and pH values for preparing the following acetic acid/acetate buffer solution. 1.) In the first step, If you plan to prepare a 2.00 M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in water? 2.) B. In the 2nd ...
*April 29, 2010*

**Physics**

You meet a person with prescription glasses of +1.74 dpt. What is the near point of this person? Express the result as a positive number! Hint: the near point of a healthy person is 25 cm. An object placed at this distance will form an image at the near point of the person. i ...
*April 28, 2010*

**physics**

You meet a person with prescription glasses of +1.74 dpt. What is the near point of this person? Express the result as a positive number! Hint: the near point of a healthy person is 25 cm. An object placed at this distance will form an image at the near point of the person. 1....
*April 27, 2010*

**physics**

A light ray strikes a flat, L = 1.6 cm thick block (depth) of glass of refractive index 1.49 at an angle of 30 with the normal. Calculate the lateral shift of the light ray, d. there is a digram showing the light ray continuing at the same angle (30* to normal) until it exits ...
*April 27, 2010*

**physics**

Two parallel wires carry currents I1=100A and I2 (they run in the same direction). The top wire is held in position; the bottom wire is prevented from moving sideways but can slide up and down without friction. if the wires have a mass of 10g/meter of length, calculate I2 such...
*April 24, 2010*

**Math**

If spiner has 3 equal sections of yellow, blue and green and another has equal sections of yellow, blue, green and red and you spin both spinners at the same time what is the probabiliy of getting 2 colors that are the same?
*April 22, 2010*

**Trigonometry**

How do I find the value of sin(a-b) if tana=4/3, cotb=5/12, 0<a<90, and 0<b<90?
*April 15, 2010*

**Math Analysis**

Oh wow that is simple. Thank you so much for your help.
*April 15, 2010*

**Math Analysis**

How do I simpllify 1-sin^2x/1-cos^2x?
*April 15, 2010*

**Math analysis**

thank you for your help
*April 15, 2010*