Questions Asked on
August 30, 2008

science
use water displacement to find the volume of four marbles in ml
asked by gina 
chemistry
In a laboratory experiment, the density of a concentrated sugar solution was determined by measuring the volume of the solution and corresponding mass. Three students each made a set of measurements using a different balance and used the results to
asked by helpp 
chemistry
Rank the size of a change in temperature of one degree fahrenheit, one degree celsius, and one kelvin. Ok I can't seem to get this question right no matter what I do. Isn't one fahrenheit degree the largest then celsius and kelvin? There are 180 fahrenheit
asked by natash 
Chemistry
I have a "connecting concepts"on the introduction to Matter worksheet to do, and I don't know how to go about doing it. Can someone please help?? Thanks
asked by Mike 
PreCalculuscheck answers
Use a sum or difference identity to find the exact value of sin 255 degrees Answer: sqrt6sqrt2/4 Thanks
asked by Lucy 
gr12 math
froma group of 6 ladies and 4 men, determine in how many ways a committee of 4 people cxan be selected. a. with no restirctions b. 4 women c. 3 women and 1 men d. 2 women and 2 men e. 4 men
asked by milo 
math
a rectangular prism has a width of 92ft. and a volume of 240ft^3. Find the volume of a similar prism with a width of 23ft. Round to the nearest tenth if necessary. a)3.8ft^3 b)60ft.^3 c)15ft.^3 d)10.4ft.^3 I am totally cinfused by this. Can somebody please
asked by Shannon 
Chemistry
You are asked to prepare 0.15 M HCl from a 36% W/v stock solution.Describe the procedure of the preparation.
asked by Jimmy K 
PreCalculus
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with
asked by Lucy 
PreCalculus
Find a numerical value of one trigonometric function of x if tanx/cotx  secx/cosx = 2/cscx a) cscx=1 b) sinx=1/2 c)cscx=1 d)sinx=1/2
asked by Lucy 
PreCalculuscheck answers
Write an equation of the tangent function with period 3pi/8, phase shift pi/5, and vertical shift 2. Answer: y=tan(8x/3  8pi/15)2 Thanks
asked by Lucy 
12 math
a club consists of 25 married couples. determine how many committee of 7 people can be formed from these coules if there are A. no restrictions B. exactky 5 men on the committe c. at least one person has to be a men d. there must be at least 3 women and 2
asked by marie 
PreCalculuscheck answers
State the period and phase shift of the function y=4tan(1/2x + 3pi/8) a) 2pi, 3pi/4 b) pi, 3pi/8 c) 2pi, 3pi/8 d) pi, 3pi/8 Answer: d 2) What is the equation for the inverse of y=cos x+3: a) y=Arccos(x+3) b) y=Arccos x3 c) y=Arccos x+3 d) y=Arccos(x3)
asked by Lucy 
math
Find the perimeter of a right triangle with legs of 20 cm, and 21 cm. a.882 b.82 c.70 d.47 I have no clue what to do. Can somebody help me with this please?
asked by kelsy 
biology
What is evolution by natural selection? Do it mean changes.
asked by kyle 
Algebra
How can you determine if a polynomial is the difference of two squares? I think that if the polynomial is x^264 that this is a polynomial that is a difference of two squares because if you factor it out you would get (x+8)(x8). If the 64 in my example
asked by Laura 
PreCalculus
I need helpI do not understand. The question is this: Write 2x+y=5 in polar form. By following the example in the book I get: 5sqrt5/5=1/sqrt5*sqrt5/2. I do not know how to proceed but the answers I have to choose from are: a) sqrt5=r cos(theta27
asked by Lucy 
PreCalculus
How do you find the polynomial funtion that best models data givn in a table for x and f(x). The only example in my testbook shows how to do it on a calculator but I cannot find any instructions with my calculator to tell me how to do it. The data for
asked by Lucy 
Language Arts
Hi! At school my teacher told me to think of a riddle that has to move things or objects around. Example: There is a fox, chicken, and a box of seeds. Get across the river with a boat that could only carry one thing at a time. If you leave or put the
asked by Anonymous 
help please????
please can u give me some advices and sites or ANYTHING that can help me speak english very good and so fast. thank you alot.
asked by XX 
physics
wht is pi + arctan(0.45)
asked by physdummy 
spanish
What does "una bombada" mean? I read it on a t.v. caption.
asked by jules 
BUSINESS LAW
I am looking for two relevant case of corportae ethical scandals that have occured over the past decade in Australia the case should be right in a legal way but..unethical
asked by LEE 
PreCalculuscheck answers
Find the number of possible negative real zeros for f(x)=6+x^4+2x^25x^312. Answer: 0 2) Approximate the real zeros of f(x)=2x^43x^22 to the nearest tenth. Answer: no real roots
asked by Lucy 
12 math
benetley chalk brush manufacturer company has 900 empolyess: are female, are union members and are single.295 are single females, 187 are single union members 190 are female union memebers and 120 are single female union members. how many workers are
asked by steveo 
Human Growth and development
I am supposed to do a paper on an article using correlational research that is presented in an inappropriate manner. I am having a lot of trouble finding an article. I have spent 3 hours searching the internet today. Any ideas?
asked by Karen 
calculus
Use integration by parts to evaluate the integral of x*sec^2(3x). My answer is ([x*tan(3x)]/3)[ln(sec(3x))/9] but it's incorrect. u=x dv=sec^2(3x)dx du=dx v=(1/3)tan(3x) [xtan(3x)]/3  integral of(1/3)tan(3x)dx  (1/3)[ln(sec(3x))/3]  [ln(sec(3x))/9]
asked by Integration by Parts 
science
what is brain
asked by pooja 
social studies
unscramble arfzunrdon two words
asked by kevin 
PreCalculuscheck answers
A farm supply store carries 50lb bags of both grain pellets and grain mash for pig feed. It can store 600 bags of pig feed. At least twice as many of its customers prefer the mash to the pellets. The store buys the pellets for $3.75 per bag and sells them
asked by Lucy 
Theory of Vibration
(1) The time for vibration of a viscousdamped spring mass system having a mass of 20kg is 0.30s. When the mass is stationary the upper end is made to move vertically downward at a velocity of 100mm/s. neglecting the mass of the spring and taking the
asked by Apanpa1 
Theory of Vibration
shows a single degree of freedom springmass system having a forced vibration and damper, starting from the second Newtonâ€™s law of motion, show that the extension of the system is given by X=Epg wnt sin(wd t + y). Also explain the conditions of the
asked by Apanpa2 
spanish
What does encantado mean English?
asked by dylan 
English
This is my essay topic: If I could delay going to college for one year, what would I do in that time? I have to write things that would relate to my major and interests in college (premed) so I need to think of some activities related to that, like
asked by mysterychicken 
Chattanooga State
How does a company use financial statements to make future decisions?
asked by Kathy 
PreCalculuscheck answers
Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of f(x,y)=x+y. Answer: an optimal solution 2)Describe the linear programming situation for this system of inequalities: Answer: an
asked by Lucy 
PreCalculuscheck answers
Name all the values of x that are not in the domain of f(x)=2x^2/x+5. Answer: x= 5 2)Find the minimum value of f(x,y)=2xy+2 for the polygonal convex set determined by this system of inequalities: x >/= 1, x
asked by Lucy 
PreCalculus
How do you work this problem. I cannot find an example in the book to illustrate how to work it. Find the value of tan(ab) if cos a=3/5, sin b=5/13, 90
asked by Lucy 
science
why do plants bear fruit?what are plant tissues?
asked by pooja 
spelling
corrections please!! gliding , hungrier, believe, receipt, noticeable, poisonous, postdate, neighbors, cities, knives.
asked by S 
english
how would i make this into a complete sentence " Willbur and Orville wright were the first. flying a powered airplane. In sustained flight.
asked by ashley 
12 math
solve for n where n {N C(n,2)=45 b. (n+2)! _____________= 56 n!
asked by steveo 
social studies
what was the name of the food that thomas jefferson returned to the u.s from france
asked by anna 
algerbra
(49*20)*5
asked by emily w 
algerbra
250*13*40
asked by emily w 
English
If only the cover of a magazine was used to write a paper, is there a need to cite it sepearately in the works cited page? If yes, how?
asked by Anonymous