Questions Asked on
February 2, 2007

polynomials & rational function
A drug is administered to a patient and the concentration of the drug in the bloodstream is monitored. At time t >= 0(in hours since giving the drug) the concentration is given by(in mg/L) c(t) = 5t / (t^2+1) Graph the function. From the graph, how do I
asked by Jen 
Physics
A 6090kg space probe mobing nosefirst toward Jupiter at 105m/s relative to the Sun, fires its rocket engine ejecting 80 kg of exhaust at a speed of 253 m/s relative to the space probe. What is the final velocity of the probe? I should have gotten 108m/s
asked by Tammy 
Chem
Nitric acid is produced commercially by the Ostwald process, represented by the following equations: 4NH3(g) + 5O2(g) > 4NO(g) + 6H2O(g) 2NO(g) + O2(g) > 2NO2 (g) 3NO2(g) + H2O(l) > 2HNO3(aq) + NO(g) What mass of NH3 must be used to produce 1.0x10^6 kg
asked by Shawn 
Probability
Roll 3 dice. What is the probability of getting a sum of: A) sum of 7: 15/216 B) sum of 8: 21/216 C) sum of 11: 27/216 D) sum of 12: 25/216 Are these correct? How many ways are there to choose 3 numbers ranging from 1 to 6 such that the sum is N? Consider
asked by Heath 
Physics
A rocket whish is in deep space and initially at rest relative to an inertial reference frame, has a mass of 2.55 X 10^5 kg of which 1.81 X10^5 kg is fuel. The rocket engine is then fired for 250 s during which feul is consumed at the rate of 480 kg/s. The
asked by Tammy 
Chemistry
A sample of a mixture containing only sodium chloride (NaCl) and potassium chloride (KCl) has a total mass of 4.000g. When this sample is dissolved in water and excess silver nitrate is added a white precipitate (AgCl) forms. After filtration and drying,
asked by Steve 
math
I am having a difficult time calculating rates and unit prices. Can someone describe a simple process for using rates and unit prices that will help me understand these concepts? I searched Google under the key words "rates 'unit prices'" to get these
asked by jeff 
math help
could some one please explain to me reciprocal how to find the reciprocal my math home work says find the reciprocal of (1/8)(13/2)(4) reciprocal you change over so is the 1/8 8/1 or would it be 8/1 13/2 would be 2/13 4 would be 4/1 then 1/4 then i
asked by larry 
Chemistry
A vessel of 9.49 L in volume contains 3.37 L of pure water at 25¡ÆC. A partial pressure of 4.73 atm of CO2 is quickly injected into the space above the water. Calculate the partial pressure of carbon dioxide remaining once the solution has become
asked by Sally 
Chemistry
I am pretty good at balancing oxidation reduction problems, but I can't do this one: HIO3 + FeI2 + HCL > FeCl3 + ICl + HOH 5HIO3 + 4FeI2 + 25HCl > 4FeCl3 + 13ICl + 15HOH I separated the three redox equations, added the two oxidation reactions together,
asked by Brendan 
math check please
Find the median of the following set of numbers 45,21,54,22,65,61 Answer 49 1/2 2. find the mean and the median of the set of grades 95,75,76,86,96,71,68,81,95,76,69,82,93,88,94 Answer mean 83 median 82 3. find the mode of the following numbers
asked by tammy 
Superhard Riddle
I need to solve a riddle but I can't figure it out. Apparently love/happiness/purpose is wrong! "Every single person that exists has had some of me and wanted some of me, but I am different for everyone. Sometimes I will never be found and sometimes I
asked by the brainbusted 
Physics URGENT
5uC charges are at the base vertices of an equilateral triangle 0.4m on a side. What is the electric field at the third vertice? im not completely sure how to start that.. don't i need the force to calculate the x&y components? NO. Figure E directly from a
asked by MatT 
analogies
clement is to clemency as A. agitate is to agitation B. governor is to prisoner C. nice is to kind Note the meanings and the parts of speech in the first pair of words. Which other pair of words have the same pattern? Please tell us your thinking on this
asked by Cassandra 
Science
Give two advantages that a telescope lens or mirror of large diameter has over one of small diameter The lightgathering power of an optical telescope is directly related to the diameter (or aperture) of the objective lens or mirror. Note that the area of
asked by Lisa 
Chemistry
Which letter of the term that is NOT a representative particle of a substance. a)molecule b)atom c)grain d)formulaunit Was ist der "Grain"? what is the representative particle for the substance moelcular compounds? an can you show me how you got the
asked by Chris 
Chemistry
how do I work out the molecular mass of a substance such as oxide of arsenic? If I'm trying to work out the oxide part of this problem, where does hydrogen come into it? You have to know the mass, and how many moles. There are other methods. Hydrogen?
asked by Annabel 
Chemistry
What is the molar mass of KI(Potassium iodide)? Here is a site for all your molar mass calculations. http://environmentalchemistry.com/yogi/reference/molar.html
asked by Bryan 
science
the oxide formed when selenium burns in air dissolves in water to give a solution of selenious acid,H2SeO3.the solution conducts electricity and turns blue litmus paper identify the positively charged ion present in an aqueous solution of the acid and then
asked by hanny dunny 
social!
To what extent should societies attempt to meet present needs, and to what extent should they try to provide for the future to the extent that they provide enough needs for now, and what is left is left. Theres old/extremist political views called
asked by missy! 
math
1.A principal of $5000 was invested in a savings account for 4 years. If the interest earned for the period was $400, what was the interest rate? 2.¨C3(10x ¨C 3) + 10(3x ¨C 3) = x ¨C 7 3.Solve and graph the solution set.
asked by stacy 
Biology
What structures make up the fibers of the mitotic spindle? Since this is not my area of expertise, I searched Google under the key words "mitotic spindle fiber structure" to get these possible sources: http://www.springerlink.com/content/n1545188147w90l7/
asked by Question 
division
27 divided by 105 = ? You'll end up with a percent or a fraction, not a whole number. (Broken Link Removed) from http://www.aaamath.com/ 27/105=9/35 hellp me !
asked by Koco123 
math
child's fair ticket is $5 and adult fair ticket are $5. 1050 people attend the fair. fair collects $7350. how many of each type of ticket were sold? sorry. child is $5 and adult is $8 Try this: x = no. of children attending the fair y = no. of adults
asked by gaynell 
economic system
"appropriate" is a loaded and subjective word. Further, some government activities and programs could be widely viewed as appropriate up to a point. That said, we generally expect our federal government to: establish a monetary system maintain economic
asked by economyst 
Chemistry
A vessel of 9.49 L in volume contains 3.37 L of pure water at 25¡ÆC. A partial pressure of 4.73 atm of CO2 is quickly injected into the space above the water. Calculate the partial pressure of carbon dioxide remaining once the solution has become
asked by Sally 
law
what is sexual orientation http://en.wikipedia.org/wiki/Sexual_orientation Sexual orientation is whether a person prefers people of his/her own gender or people of the other gender.
asked by angel 
Social Studies Question
I have to present something that had to do with the years 17901865. Any ideas? Some examples were: powerpoint presentations, written reports, songs, plays, demonstrations, etc. That depends upon your interests, skills, and abilities. When my daughter was
asked by Anonymous 
Chemistry (check)
is the following sentence true or false? To determine the number of representative particles in a compound, you count the molecules by viewing them under a microscope.__true______ Most molecules are too small to see with an ordinary microscope. Can molar
asked by Chris 
physical geography
A On Dec .21, what is the noon sun angle for someone at 54 degree N lat.? B In what horizon ( part of the sky using compass directions) is the noon sun? Isn't Dec 21 the shortest day of the year? Hint: what makes it the shortest day of the year?
asked by Bob 
chemistry
give the formular of the highest hydride and highest flouride of ununhexium and explain how you arrived at your answer You can find Uuh in the periodic table. Placement of Uuh in the periodic table will tell you that the chemistry will be similar to the
asked by montana 
predication
A book that has an exciting introduction and a surprising ending would be the best story to read. okay! sure what book is it? Please post a question so we'll know what kind of help you need. Thanks. =) Here are some results I found when I searched Google
asked by jeana williams 
Chemistry
This is a question on Nonstandard states. Calculate ¥ÄG605 for the following reaction under the given conditions. Use data obtained from the table below and assume that ¥ÄHo and ¥ÄSo do not vary with temperature. C2H4(g) + H2O(g) ¡æ C2H5OH(g) The
asked by Sally 
Children's Literature Question
Which statement is true? 1.Setting is a backdrop that can be changed without affecting the plot. or 2.Good plot builds logically and plausibly with casual relationships connecting all the events. I say 2 is true, my friend says 1 is true. Who is correct? I
asked by Karin 
analogies
chef is to kitchen as A.blacksmith is to foundry B.teacher is to education C.pilot is to airplane A chef works in a kitchen and prepares food. Which of the other pairs of words names a person and the place he works? Which profession makes something in
asked by Cassandra 
Geog
Why does each time zone extend 7 1/2 degrees on each side of central meridian rather than extending from 0 degrees to 15 degree? Why do you think it is?
asked by matt 
more physics
in the equation P= 2m/ ne^2 t what do these symbols mean? p  resistor m  mass of e n  ?? e  electron charge>?? t  time between collisions??
asked by MatT 
english grammar
I have to submit this paragraph and I am having grammar problems. Can someone help me so that I can correct my mistakes and make a good grade. Here is the paragraph: My vision of the ideal city is probably similar to what many people would describe as a
asked by Brandi 
how important...
How important are individual freedom and equality in decisions about economic systems? Economic systems focus on the largest profits or the greatest good for the greatest number of people. Individual freedom and equality don't play much of a role in
asked by Spider woman! 
development
To what extent does development mean more than than economic growth? Development of what? Please clarify your question and tell us what you think the answer is. We'll be glad to critique your ideas.
asked by na 
Math
http://psych.colorado.edu/~mcclella/java/normal/accurateNormal.html Put the mean, and the standard deviation in the top of the applet. Having a lot of trouble with this one problem...any help would be appreciated The weight of the eggs produced by a
asked by bobpursley 
math(10)
evaluate:fraction 8over4,subtract7over6 I'm going to assume your problem is this: 8/4  7/6 = ? 8/4 is the same as 2. Let's convert 2 to a fraction using 6 as the denominator: 12/6  7/6 = 19/6 I hope this helps and is what you were asking.
asked by jesseca 
Biology
What is the difference between necessary and essential nutrients? I don't think any difference. essential nutrients is the term used more frequently by health care professionals. Se the two sites below: http://en.wikipedia.org/wiki/Essential_nutrient
asked by Krystle 
math
a bathroom cleaner contains 1 part of bleach with 4 parts of water. if you need 10 parts of bathroom cleaner, how much water and bleach do you need? If 1 part bleach and 4 parts water = 5 parts, then what do you need to do to get 10 parts? Although this
asked by mae 
Current Event
Where can i find an current event paper related to business? I found one.. on google
asked by Bryan 
Business
Why is WACC important to an organization? Thank you for using the Jiskha Homework Help Forum. It is difficult to calculate the WACC but it is a solid way to measure the quality of y our investment. What impact does WACC have on capital budgeting and
asked by Joseph 
MATH
About 0.350 of a forest is being cleared of timber. If the stretch of forest is divided into hundredths, how many hundredths are being cleared? You can drop the zero on the right and read the number. Remember the place values to the right of the decimal
asked by Anonymous 
math
1/x + 1/x+2 =11/60 What's the first step to find value of x? Multiply both sides of the equation by x(x+2) You get: x+2 + x = 11/60 x*(x+2) > 11/60 x^2 + (11/30  2)x  2 = 0
asked by Al 
math
how do you the equation of a line in a coordinate plane? Hello Tim, if I understand your question right, the equation of a line is: y = m*x + c Hope this helps.
asked by tim 
science
when the oxide of arsenic is heated it sublimes and becomes a gas. at 650oc and a pressure of 690mmHg the 0.927g sample of the oxide has a volume of 194cm3. calculate the volume,in cm3, that the sample would have at the same temperture (650oc) but at a
asked by hanny dunny 
sports
What does these colleges have in common..Samford, Georgia, Marshall, Illinois State, Murray State, Cincinnati, UTC,Kent State, Western Kentucky and Wake Forest and WisconsinMilwaukee?
asked by CINDY 
MATH
About 0.350 of s stretch of forest is being cleared of timber. If the stretch of forest is divided into hundredths, how many hundredths are being cleared? Can you help me solve this question? Please see my previous answer.
asked by Anonymous 
MATH
About 0.350 of s stretch of forest is being cleared of timber. If the stretch of forest is divided into hundredths, how many hundredths are being cleared? Can you help me solve this question? .01 times .350 As I read the question, the stretch is being
asked by superman2