Friday

October 9, 2015
Total # Posts: 482

**chem**

A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the KOH solution? I don't even know where to begin with the first one. Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it ...
*February 26, 2009*

**stats multiple choice ?**

A researcher reports that "Students were randomly assignment to intervention or a control group; the two groups did not differ significantly prior to the start of the intervention. At the end of the study, those receiving the intervention showed statistically significant ...
*February 18, 2009*

**Stats multiple choice ?**

If we are told that statistical significance has been achieved, what does that allow us to infer? A. That the differences seen in the samples can be generalized to the population that the sample represents. B. That the measures used are valid and reliable. C. That each of the ...
*February 18, 2009*

**stats multiple choice ?**

A researcher reports that "Students were randomly assignment to intervention or a control group; the two groups did not differ significantly prior to the start of the intervention. At the end of the study, those receiving the intervention showed statistically significant ...
*February 18, 2009*

**Stats multiple choice ?**

What is wrong with the following statement: “In our study, people with bipolar disorder who underwent therapy in addition to taking medication were significantly less likely (p < 0.05) to require hospitalization as compared to those taking medication alone. We found no...
*February 18, 2009*

**mean ?**

Does any one know how to find the mean of a normal gaussian distribution just by looking at the graph??
*February 18, 2009*

**mean & mode ?**

If you were a teacher, and these numbers represented your students' scores on a test, would the median or mean give a better picture of the overall class performance? The numbers are 22,38,42,65,75,76,79,82,83,87,88,89,89,91,92,94,96,97,98 The mean is: 78.053 & the median ...
*February 18, 2009*

**chemistry**

how many milliliters of 5M NaCl are required to prepare 1500 ml of .002M solution?
*February 5, 2009*

**chemistry**

thanks
*February 5, 2009*

**chemistry**

how many grams of solid NaOH are required to prepare 200 ml of a .05 M solution?
*February 5, 2009*

**biology**

A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water?
*January 30, 2009*

**pre cal**

what is the sum of e or 1n
*January 11, 2009*

**precal**

(-8)the exponent is -1/3
*January 7, 2009*

**precal**

(48)with the exponent of 1/2
*January 7, 2009*

**Chemistry...Please Help**

eric is right. pg 682 has it listed. but its the same thing gk was saying, just less work
*January 6, 2009*

**government**

What different kinds of opinions do Justices of the Supreme Court write?
*December 14, 2008*

**Math**

50%
*December 9, 2008*

**algebra**

What is 4x+12=20
*November 30, 2008*

**ap euro**

the french goverment tried to improve living standards for the rural poor by a)paying a stipend to poor families b)encouraginf chea; english imports c)hiring the poor on major public works projects d)establishing a nat'l network of free public elementary schools e)...
*November 29, 2008*

**ap euro**

After 1700, Spain a) began losing chunks of her empire to britian b)recovered the late 17th century crisis and held on to her american empire c)acquired brazil from portugual d)abandoned california e)withdrew from slave trade
*November 29, 2008*

**ap euro**

by the 1770s, the biggest increase in foreign trade was with
*November 29, 2008*

**Case study**

Where can i find real company case studies?
*November 17, 2008*

**negative prefixes**

I am trying to plan a lesson about negative prefixes for 5th graders and can't find any good websites to help me. I was hoping someone could help me find some resources. If someone knew of a fun or interesting way to teach this lesson that would be even better. Thank you!
*November 15, 2008*

**prealgebra**

2=n-(2n+3)
*November 12, 2008*

**physic**

a car travels in a straight line for 3 h at a constant speed of 53 km/h. what is the acceraleration? answer in units of m/s2.
*November 1, 2008*

**Pre-Cal**

xy=2 {{x^2=3+y^2}}
*October 21, 2008*

**12th grade Physics**

a car travels in a straight line for 3 h at a constant speed of 53 km/h. what is the acceraleration? answer in units of m/s2.
*October 7, 2008*

**Ethnic Diversity**

yepp in the same class right now... this is crazy I cannot find anything for this Checkpoint. This bits but Ima have to try my best. Even if it means no luck... If anyone can figure it out let me know. =)
*September 2, 2008*

**keybording and word processing**

A) Only A
*June 9, 2008*

**Algebra**

what is 3 to the square root of 75 plus 2 to the square root of 5
*May 16, 2008*

**Geometry**

Given angle 1 = (x + 7)degree, angle 2 = *(2x -3)degree, angle ABC = (x 2nd power) degree, angle D = (5x - 4)degree. Show that angle ABC congruent to angle D
*May 1, 2008*

**literary term definition**

what literary term might be used for this? "but if possibility of evil be to exclude good, no good ever can be done
*April 18, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

when do sky divers use decimals?
*April 6, 2008*

**math**

12 ln x=44
*March 23, 2008*

**HELPPPPPP**

Ms. Sue, you're here to HELP. Not get smart with people trying to find help, which is your job on here. I don't care if she posted it in the math section, if you're not going to help then don't answer! Your job is NOT to get smart and direct people to the right...
*March 18, 2008*

**math-probability**

Mary has 3 boxes with Marbles. Eavh box is labeled so that she knows what is in each box. She has 1 box with 2 blue marbles, another box with 2 red marbles and a 3rd box with 1 red and 1 blue marble. Mary's little sister removed all the labels and she placed them back ...
*March 4, 2008*

**math-probability**

A King sends for 3 prisoners. HE has 3 black hats and 2 white hats. He blindfolds the prisoners & puts a hat on each. He then removes the blindfolds & allows them to look at each other. He tells them that if they can tell him the color of the hat they have on, he will set them...
*March 4, 2008*

**math-probability**

Mary has 3 boxes with Marbles. Eavh box is labeled so that she knows what is in each box. She has 1 box with 2 blue marbles, another box with 2 red marbles and a 3rd box with 1 red and 1 blue marble. Mary's little sister removed all the labels and she placed them back ...
*March 4, 2008*

**Algebra**

im confused on how to go about the problem. thats y i need help on how to start.
*February 25, 2008*

**Algebra**

All the even numbers from 2 to 98 inclusive, except those ending in 0, are multiplied together. What is the rightmost digit, that is, the units digit of the product? (a) 0 (b) 2 (c) 4 (d) 6 (e) 8
*February 25, 2008*

**Algebra**

im confused on how to go about the problem. thats y i need help on how to start.
*February 25, 2008*

**Algebra**

The positive integer 4 can be represented as a sum of 1's or 2's in five ways, such as 1 + 2 + 1 and 1 + 1 + 2. Show all the ways that the positive integer 5 can be represented as a sum of 1's or 2's.
*February 25, 2008*

**Algebra**

im confused on how to go about the problem. thats y i need help on how to start.
*February 25, 2008*

**Algebra**

What is the sum of all possible digits that could fill in the blank in 47_021 so that the resulting five digit number is divisible by 3?
*February 25, 2008*

**Algebra**

What is the sum of all two digit positive integers whose squares end with the digits 01?
*February 25, 2008*

**algebra**

im confused on how to go about the problem. thats y i need help on how to start.
*February 25, 2008*

**algebra**

If a is 50% larger than c and b is 25% larger than c, then a is what percent larger than b? (a) 20% (b) 25% (c) 50% (d) 100% (e) 200%
*February 25, 2008*

**Physics**

A volleyball is spiked downward at a 55 degree angle gom the vertical net.If the ball is traveling at 22m/s, what are its horizontal and vertical components?
*January 27, 2008*

**Physics**

A snail crawls up a bent piece of grass at 2cm/s. If the grass makes a 75 degree angle to the ground,what are the horizontal and vertical components of the snails velocity?
*January 27, 2008*

**Algebra**

my teacher gave it to me an i strictly copied an pasted. i think that i have to solve the equation using algebra.by finding the value for A,plug in in an so forth..is that right???
*January 27, 2008*

**Algebra**

Suppose that a, b, and c are digits for which the number 708,16b,8c9 is a multiple of 99. Find a+b+c.
*January 27, 2008*

**Algebra**

Digit d is randomly selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9}. Without replacement of d, another digit, e is selected. What is the probability that the two digit number de is a multiple of 3
*January 27, 2008*

**Calculus**

well i know it has to begin and end with a 1,3,4,5, or 7.but i dnt know at to do after...
*January 26, 2008*

**Calculus**

well i know it has to begin and end with a 1,3,4,5, or 7.but i dnt know at to do after
*January 26, 2008*

**Pre AP Physical Science**

If a person's average speed for a 10.00 kilometer race is 5.644 meters per second, what was her winning time?
*January 24, 2008*

**science**

HELP! (UNGERT)due next week tue 11 dec :what the similarities+differences between a light microscope and a electron microscope?
*December 4, 2007*

**science**

similarities+differences between a light microscope and a electron microscope?
*December 4, 2007*

**math**

I hate u!
*December 3, 2007*

**CHEM**

Always polar on mastering chemistry
*November 26, 2007*

**Math**

Help!
*November 1, 2007*

**Math**

(-2) and -2^2. Why are the answers different?
*November 1, 2007*

**alternative health**

what are the cell builders
*October 29, 2007*

**Science**

A girl makes a sample of a new material and says that the density of the material is 0.85 g/cm. Can you tell how large a sample she made? How?
*October 28, 2007*

**ap physics**

can you please check my answers and help me with one question? During a lie dector test, a voltage of 6 V is impressed across two fingers. When a certain question is asked, the resistance between the fingers drops from 400,000 ohms to 200, 000 ohms. What is the current (a) ...
*October 25, 2007*

**ap physics**

can you please check my answers and help me with one question? During a lie dector test, a voltage of 6 V is impressed across two fingers. When a certain question is asked, the resistance between the fingers drops from 400,000 ohms to 200, 000 ohms. What is the current (a) ...
*October 25, 2007*

**Decartes Rule**

Can you please check my work? Use Decartes Rule of signs to determine the possible number of postive and negative real zeros for the given function. 1. f(x)=-7x^9+x^5-x^2+6 This is what I did: There are 2 sign changes f(-x)=-7(-x)^9+(-x)^5-(-x)^2+6 There are 2 sign changes So...
*October 12, 2007*

**Decartes Rules**

Use Decartes Rule of signs to determine the possible number of postive and negative real zeros for the given function. Please check my answers? 1. f(x)=-7x^9+x^5-x^2+6 This is what I did: There are 2 sign changes f(-x)=-7(-x)^9+(-x)^5-(-x)^2+6 There are 2 sign changes So, are ...
*October 10, 2007*

**Decartes Rule of Signs-Check Problems**

Use Decartes Rule of signs to determine the possible number of postive and negative real zeros for the given function. 1. f(x)=-7x^9+x^5-x^2+6 This is what I did: There are 2 sign changes f(-x)=-7(-x)^9+(-x)^5-(-x)^2+6 There are 2 sign changes So, are there 2 or 0 positive ...
*October 9, 2007*

**Decartes Rule of Signs**

Could you explain to me decartes Rule of signs? Here are my questions: Use Decartes Rule of signs to determine the possible number of postive and negative real zeros for the given function. 1. f(x)=-7x^9+x^5-x^2+6 choices are: a. 2 or 0 positive zeros,2 or 0 negative zeros b.2...
*October 9, 2007*

**physics**

528
*September 16, 2007*

**physics**

501.60
*September 16, 2007*

**econ**

In France each unit of labour can produce 3 bottles of wine or 2 shirts. In Portugal each unit of labour can produce 2 bottles of wine or 1 shirt. Which country has a comparative advantage in producing wine? It would seem that France has the advantage. No its Portugal. The ...
*May 22, 2007*

**BCIS**

List netiquette guidelines.
*May 21, 2007*

**Capital Budgeting**

A company has revenues of 100 per unit sold. Current sales are 7500 units. Labor rates are 15 per hour. It takes 1.2 hours of labor to make each buggy. Material costs are 13.50 per unit. Figures are expected to remain the same permanently if the company continues to ...
*April 24, 2007*

**GEOLOGY-IMPORTANT**

hi i am looking for geologically relevant song lyrics or poetry published after 1990. The stuff cant be writen by a geologist either. i realllly need to find this any help i would appreciate so much!!! thank you.
*December 5, 2006*

**geology-important!**

hi i am looking for geologically relevant song lyrics or poetry published after 1990. i realllly need to find this any help i would appreciate so much!!! thank you. http://www.danneyball.com/_51.htm http://www.exploratorium.edu/faultline/activezone/media.html http://www.twin-...
*December 2, 2006*

**Integration**

ç e^ãx / ãx dx Your symbols are not legible. Please retype using normal keyboard characters Integration of e^radicalx / radicalx dx
*November 30, 2006*

**Math**

ç 2x^3 + 3x^2 + x + 1 dx --------------------- -2x + 1 [2x^3 + 3x^2 + x + 1]/(-2x + 1) = ax^2 + bx + c + d/(-2x + 1) ----> 2x^3 + 3x^2 + x + 1 = (ax^2 + bx + c)* (-2x + 1) + d Find a, b , c and d by equating the coeffients of equal powers of x on both sides. ...
*November 30, 2006*

**Identifying controls and Variables**

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special Juice. After an hour, ...
*October 1, 2006*

**Science**

I missed a few days and I forgot what the following are Independent Variable Dependent Variable Control and the order of scientific methood This should refresh your memory. An independent variable is the potential stimulus or cause, usually directly manipulated by the ...
*October 1, 2006*

**ap chem0 frequency**

how do u do this type of problem... What is the frequency of a photon with a wavelength of 2.25 102 nm? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 Js c = fw. c is speed of light which you have, f is frequency for which you must solve...
*September 28, 2006*

**ap chem-3 quest just need 1 answer**

A rifle bullet (mass = 1.50 g) is moving with a velocity of 850. mph. What is the wavelength associated with this bullet? Assume your eyes receive a signal consisting of blue light, = 470 nm. The energy of the signal is 2.5 10-14 J. How many photons reach your eyes? You must ...
*September 27, 2006*