Saturday

January 31, 2015

January 31, 2015

Total # Posts: 231

**3rd grade science**

what is a form of energy
*December 8, 2008*

**3rd grade science**

what are forms of energy
*December 8, 2008*

**chemistry**

three questions please: (1) What kinds of evidence can you use to determine if a chemical reaction has occurred? (2) How do the properties of the cooked egg differ from the properties of a raw egg? (3) how are the endothermic and exothermic reactions the same? How are they ...
*December 2, 2008*

**algebra**

(x^2n - y^n)(x^2n -Y^n)
*November 27, 2008*

**algebra**

(x^2n - y^n)(x^2n -Y^n)
*November 27, 2008*

**math**

10x+5y^2+2xy-4y^2+4xy-x3=
*October 30, 2008*

**Statistics**

Problem 2: A random sample of 10 miniature tootsie rolls was taken from a bag, each piece weighed on a very accurate scale. The results in grams were: 3.087 3.131 3.241 3.241 3.27 3.353 3.4 3.411 3.437 3.477 a)construct a 90% confidence interval for the true mean weight. b)...
*October 20, 2008*

**Statistics**

I have 2 statistics problems that I've done and felt completely confident with them until I worked the problem a different way and got a different answer. I was wondering if you could tell me if I have the right answers or not. Thanks so much! A certain air plane has 2 ...
*October 20, 2008*

**Statistics**

What measurement forms normal distribution? Would it be the mean and variance? (avg. and standard deviation) Could you help me please
*October 15, 2008*

**Statistics**

What measurement forms normal distribution?
*October 15, 2008*

**8th Grade Math**

Tom was floating down the river on a raft when, 1km lower down, Michael took to the water in a rowing boat. Michael rowed downstream at his fastest pace. Then he turned around and rowed back, arriving at this starting point just as Tom drifted by. If Michael's rowing speed...
*September 30, 2008*

**Maths**

In a quadrilateral ABCD, angle A = 120 degrees angle B = 140 degrees The bisectors of the angles C and D meet at the point Y. Find the size of the angle DYC
*September 30, 2008*

**math**

The RANGE is the difference between the lowest and highest values. In this case 100 - 80 = 20, so the range is 20. The range tells you something about how spread out the data are. Data with large ranges tend to be more spread out.
*September 30, 2008*

**Maths - Pigeon-hole principle**

Using the Pigeon-hole principle... 91 five-digit numbers are written on a blackboard. Prove that one can find three numbers on the blackboard such that the sums of their digits are equal.
*September 30, 2008*

**maths**

91 five-digit numbers are written on a blackboard. Prove that one can find three numbers on the blackboard such that the sums of their digits are equal.
*September 30, 2008*

**Maths**

When a certain number N is divided by d, the remainder is 7. If the original number N is multiplied by 5 and then divided by d, the remainder is 10. Find d.
*September 30, 2008*

**8th grade math.**

i need help with dividing negative numbers. for example :what is -2/-4.
*September 8, 2008*

**respost A&P**

Dengue fever and Dengue Hemorrhagic Fever (DHF) "Dengue and dengue hemorrhagic fever (DHF) results from infection by any of four serotypes of dengue viruses. Transmission occurs through the bite of infected Aedes mosquitoes, principally Aedes aegypti, which is also the ...
*July 20, 2008*

**Anatomy and Physiology paper**

I have to do a research paper in A&P please check this over for me and lwt me know what you thinks thanks this what needs to be done Select a single medical disorder. Consult resources other than the course textbook and this study guide. Examples of resources include other ...
*July 19, 2008*

**chemistry**

This person meant sulfite.
*July 1, 2008*

**math-algebra**

sqrt27xy^3/sqrt9x I'm getting 3 answers to this. yxsqrt3y/x, ysqrt3xy/3x, and 3sqrt3y Can anyone please tell me which one is correct?
*June 10, 2008*

**Chemistry**

The absorbance values At & A0 recorded in the experiment 'Rate Law Determination of the Crystal Violet Reaction' are used in the place of the concentration values of which species A. CVOH B. CV+ C. –OH D. Na+ E. H2O
*May 16, 2008*

**chemistry**

zero and second are right but first is not b, i dont know what it is
*May 15, 2008*

**chemistry**

the question is not answered above!! please help!!
*May 1, 2008*

**Chemistry**

I think half reactions are redox and Pb has the greatest ability to reduce its neutral metal
*April 21, 2008*

**chemistry**

I still don't understand are the reactants on one side of the || and on the other side is products? for the second one there are 2 answers that could possibly work here
*April 18, 2008*

**science**

identify three kinds of nerons that are found in the nervos system?describe how they interact to carry nreve impulse?
*March 20, 2008*

**math**

I had this same question ;) I guess its already been answered
*March 2, 2008*

**physics**

Which truck has more momentum?? 20kg*m/s or 20000kg*m/s??? HELPPP!!!
*October 8, 2007*

**Social Studies**

Can you please help me understand what is meant by "democratic spirit"? Thanks
*September 30, 2007*

**Chemistry 1 H**

AgNO3+ BaCl2-> AgCl+ Ba(NO3)2 a. balence the equasion b. How many grams of silver chloride(AgCl) are produced from 5.0g of silver nitrate (AgNO3) reacting with an excess of barium chloride(Ba Cl2)? c. How Many grams of barium chloride (BaCl2) is necessary to react with 5.0...
*January 4, 2007*