Sunday
February 14, 2016

# Posts by ruby

Total # Posts: 208

mathematics
Please help me answer this question; 1.A metal gutter open at the tops and ends, is bent up from material 30 cm wide to form a rectangular cross section. a) If the base of the gutter is x cm wide, find the height of the gutter. b)Show that the area of the gutter cross section ...
August 29, 2011

Maths
please help me answer this question: A pilot sets to fly from B to A and wishes to set a course to offset a 32 km/h easterly wind.The aircraft can fly at the speed of 800km/h in still air. A is 256 from B in a bearing of 330 degrees. a)on what course must the aircraft be set? ...
August 11, 2011

math puzzle
(2^2)+(7^3)+(4^3)+ 3 + 4 +(3^2) =? (2x2)+(7x7x7)+(4x4x4)+3+4 +(3x3) =? 4+ 147 + 64 + 7 + 9 = 231
June 5, 2011

algebra 1
(-6+3=y) the following equation given is a linear function:(general formula is y = mx+c)..where m = the gradient, and c= the y-intercept.hence in the equation given; m is= -6, & c=3. to find the x-intercept, make y = 0. eg. -6x+3=y -6x+3=0 -6x=-3 -6x/-3=-3/-3 2x=1 x=1/2
June 5, 2011

trigonometry
Yes, the question should be : 2(sec^A -2)/4 tan A
June 5, 2011

trigonometry
Simplify:2sec^2A-2/4tan A...Please help,anyone who can answer
June 5, 2011

history
thanks very much.
June 5, 2011

history
briefly: what is vietnamisation?
June 5, 2011

trig
on the same set of axes: (0 degrees is greater than or equal to x and x is less than or equal to 360 degrees) (a) sketch the graphs of y= sin degrees ,y=2sinx degrees and y=sin2x degrees
June 4, 2011

trig
Given Tangent theta = -5 on 4 and cos theta >0, find sine theta and sec theta
June 4, 2011

science
what is the average speed from 5s to 10s
May 5, 2011

sphysical cience
a car's speed changes from to travel 325m if your car can 160m/s
May 5, 2011

algebra b1
5x+4=y y-3x=7
February 16, 2011

Math
So here's our question " Chet bought a rug that cost \$280. He had a coupon for about 10% off" now here is our two questions how much did he save with the discount?? And our other one is how much did he pay he paid 130
February 10, 2011

Math
how can you condense these cos^3x* cos2x^2 cos^3x- cos2x^2 Thanks a lot :)
January 23, 2011

Pre-Calc
x=+-√(14
January 23, 2011

Chemistry
Superphosphate, a water soluble fertilizer, is sometimes marked as a "triple phosphate". It is a mixture of Ca(H2PO4)2 + 2CaSO4. Ca3(PO4)2 + 2H2SO4 --> Ca(H2PO4)2 + 2CaSO4 If you treat 400g of calcium phosphate with 267g of sulfuric acid, how many g of ...
January 8, 2011

math
Use formula LCM x GCF = product of two numbers GCF = 180 / 60= 3
January 8, 2011

geometry
two of the angle of a arallelogram measure 75 what are the measures of the other two angle
November 29, 2010

bobpursley please help
wait. nevermind about the .0330. but why divide by 2?
November 28, 2010

bobpursley please help
yes, Thanks! but... i dont understand how you got the .0330 and why you divide the whole thing by 2.
November 28, 2010

bobpursley please help
A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude 1.93 rad/s2, how far ...
November 28, 2010

physics help?
wi = 16.1 rad/s = 2.5624 rev/s a = -1.93 rad/s^s = -.3072 rev/s^2 0=2.6^2+2(.3072)theta theta=11.0026 rev 2pi*r*theta and i get the answer to be 1.14m but thats not right.
November 28, 2010

physics help?
i keep getting the wrong answer... still.
November 28, 2010

physics help?
A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude 1.93 rad/s2, how far ...
November 28, 2010

media and culture
i know that media convergence is taking things and making putting it together as one service. like bundling cable internet and phone. but i do not get how this has impacted our culture!
November 15, 2010

com 156
i know that media convergence is taking things and making putting it together as one service. like bundling cable internet and phone. but i do not get how this has impacted our culture!
November 15, 2010

com 156
thank you. I read all this and understand it but i feel like the question repeats some of the other question answer and i feel like i am repeating my self. i am writing an essay for media and culture and i just feel like i am not understanding it enough. but the essay is ...
November 15, 2010

com 156
i understand that media has changed our culture by making things easie to access and that we have became more reliable on the internet. even after reading my chapter i still do not understand what they are expecting me to put for how it has changed american culture can some ...
November 15, 2010

comm/155
Hi could you check my sentences to see if their right?
November 14, 2010

physics
a soccer player kicks a stationary ball giving it a speed of 20m/s at an angle of 15degrees to the horizontal. what is the maximum height reached by the ball?
October 15, 2010

chemistry
If 2.10 kJ of heat is needed to raise the temperature of a sample of metal from 10.°C to 28°C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 34°C to 57°C?
October 6, 2010

biology
is hypothesis accepted if can't be proven wrong?
August 25, 2010

Statistics
Assuming that the heights of college women are normally distributed with mean 62 inches and standard deviation 3.5 inches, what percentage of women are between 58.5 inches and 72.5 inches? a. 13.6% b. 84.0% c. 97.6% d. 34.1% e. 15.7%
June 20, 2010

chemistry
What mass iron(III) oxide could be produced from 8.2 mol of oxygen gas in the synthesis of iron(III)?(Balanced equation)
March 15, 2010

trig
prove: tan*2x-sin*2x=sin*2xtan*2x
March 10, 2010

writing
Can you help me correct these sentences? 1.She wants to become an environmental scientist she is especially interested in marine life. 2.If she can get a scholarship she would like to spend her senior year in New Zealand. 3.The Great Coral Reef almost cicles New Zealand it has...
February 23, 2010

business memo
can someone double check for me? This is the second part to the business letter I posted a few days ago. Process: Draft an interoffice memorandum to Miriam Hopkins, the Director of Human Resources: a. Assume that you’ve received confirmation from Jeremy Dittmer for the ...
February 15, 2010

business letter
here's the memo part, the email part will come later. and I understand the date and time thing now. I need to put a period between a.m. process: 3. Draft an interoffice memorandum to Miriam Hopkins, the Director of Human Resources: a. Assume that you’ve received ...
February 13, 2010

business letter
I don't understand the June 30,2010 part. Shall I put June 30th, 2010? Corrected: There will be twenty office supervisors attending, and light refreshments will be provided for breaks.
February 13, 2010

business letter
Revised: And thanks for your help. Broadworth General Hospital 123 Main St. Boston, MA 41467 February 13, 2010 Jeremy Dittmer, Employee Relations Specialist Wydade Consulting Services 456 Apple Way Anytown, MA 12345 Dear Mr. Dittmer, I am writing to you today to request a ...
February 13, 2010

business letter
can you check for me? Thanks Assigment: write a business letter according to the background. Background:Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of ...
February 13, 2010

biology
Hi Christina, The offspring of true-breeding parents are called the a) F1 generation. Think of it like in human families: the parents have the first generation of kids. Then, when THOSE kids have kids - producing grandkids - that's an F2 generation. So PxP=F1 and F1xF1=F2...
January 20, 2010

confidentiality of health information
When should the computerized medical database be online to the computer terminal?
December 28, 2009

college
Find the mean of the following set of numbers. 13, 15, 18, 18, 18, 19, 22, 26, 28, 33
November 18, 2009

math
write an integer to represent each description
November 18, 2009

physics
The maximum speed that a car can travel around a flat curved road is 18m/s. What would be the maximum speed for that car around a curve with half the radius?
November 17, 2009

Science
You are given a wooden block that is 25cm long, 8cm wide and 3cm tall. Also, the block of wood has a mass of 350 grams. What is the density of this block of wood?
September 22, 2009

health
ms sue i dont understand you comment
September 22, 2009

health
What are some current nutritional issues, such as obesity or malnutrition, that might affect newborns to 3 years of age?
September 22, 2009

health
How might nutrition affect growth, development, and learning for newborns to 3 years of age?
September 22, 2009

math
BLAH BLAH BLAH BLAH AND TY FOR THE BRACES ANSWER
August 25, 2009

English
Hi there, I am doing a presentation on Martin Luther King's March on Washington August 28th, 1963 and was wondering if you direct me to any useful links to information, videos and pictures.
March 10, 2009

algebra 1 page 167 did you hear about...
The farmer who named his pet rooster robinson because it crew up?
February 22, 2009

calculus
A ball of radius 10 has a round hole of radius 8 drilled through its center. Find the volume of the resulting solid.
February 3, 2009

PLEASE HELP!
can some one please help me, i really really need help. thanks for any help.
July 24, 2008

Pythagorean theorm
i have been workin on this problem for hours and desperatly need help. Im suppose to solve the following three problems in the pythagoream theorem form and also find the ratios. Can someone pleasse help me =] Pythagorean Theorem a² + b² = c² 1.) O = 30° & &...
July 24, 2008

Pythagorean Theorem
i was given this in class: Pythagorean Theorem a^2 + b^2 = c^2 1.) O = 30° & Φ = 60° 2.) O = 45° & Φ = 45° 3.) O = 0 ° How would you calculate the ratio for these sides/angles?
July 23, 2008

hmm
kk, thanx, thats what i thought, but my physics teacher said it is possible. I don't understand.
July 23, 2008

physics
A box is resting on a table frictionless). Determine the weight of the box and the normal force acting on it. (a) If the box was pushed down, with a force of 40N, determine again the normal force acting on the box. (b) If the box was pulled up with a force of 40N, what now is ...
July 22, 2008

physics
!* =)
July 22, 2008

physics
Yes! thank you both! this really helps1
July 22, 2008

sorry!
For this problem: A person throws a ball upward with an initial velocity of 15 m per second. In order to calculate how high the ball goes, drwls gave me this formula below: It travels upwards until the vertical velocity component becomes zero. The calculaitons are below: (1/2)...
July 22, 2008

physics
How would you reword the terms of this equation: (1/2)M Vo^2 = M g H Where H is the maximum height above the thrower's hand. H = Vo²/(2 g) = 11.5 m Could you substitute the letters H & M with Y, Yo, V, Vo, G, T, or use any of these four newton's equtions: V = Vo...
July 22, 2008

physics
thanx =) for all your help!
July 21, 2008

question?
so, then to calculate the distance, the formula would be 50 m =(1/2)(9.8m/s^2)(t^2) and you would neglect the negative signs, but then instead of dividing 50m by -90.8m/s^2, how would u use that formula to find the value of t? Sorry, i am just really confused regarding all of ...
July 21, 2008

physics
-Suppose that a person is standing on the edge of a cliff 50 m high, so that the ball in his/her hand can fall to the base of the cliff. Questions (a)-How long does it take to reach the base of the cliff? (b)- What is the total distance traveled by the ball? Attempted Answers...
July 21, 2008

math
1 kg is equivilant to about 2.2 lbs. So if you would give 0.1 g per kg, you would convert this to lbs which would give you approx. 0.045 gram/lb. Now simply multiply. 0.045 x 50 = 2.25 grams. =)
July 21, 2008

physics
thanx so much! im finally starting to get this!
July 21, 2008

physics
-A person throws a ball upward into the air with an initial velocity of 15 m per second. - How could you calculate how high the ball goes and how long the ball is in the air before it comes to the thrower's hand?
July 21, 2008

physics
THANK YOU SOO MUCH!! THIS REALLY HELPED!!!
July 20, 2008

physics
earlier in this forum, marina asked the same question as i did. unfortunately, someone did answer, very clearly, but for some reason i remained to be a little lost. Here is the question: A car traveling 90 km/h is 100 m behind a truck traveling 75 km/h. How long will it take ...
July 20, 2008

Physics
THANX SOO MUCH!! YOU ARE AWESOME!!
July 20, 2008

Physics
Physics Homework _____________________________________________________________ 1.) A particle at t 1 = -2.0 s is at x 1 = 3.4 cm and at t 2 = 4.5 s is at x2 = 8.5 cm. What is its average velocity? Can you calculate its average speed from this data? ...
July 20, 2008

physics ---- more help please
this answer is correct but i need the mathematical law needed to solve this problem.
July 16, 2008

physics
the question is this: suppose you want to design an air-bag system that can protect the driver in an head-on collision at a speed of 100 km/h. estimate how fast the airbag must inflate to protect the driver-- I GOT THE CORRECT ANSWER TO THIS ONE ALREADY. now the second ...
July 16, 2008

HCA
What are the consequences of seperarating mental health from physical health caare
June 23, 2008

ETH
Thank you for your advice. I like how that sounds The paper is a challenge I am a very non racial person and the town I live in is small and really has non of the issues I need to write about, that I am aware of at least, I am sure some exist...
April 3, 2008

ETH
We are writing a paper on "Race in your Community" and I have had a hard time getting going because I live in a small town with really one ethnic group, however as I dug I started finding some minority groups are here, what I am looking for is for some opinions on my...
April 3, 2008

math
A family spends 20% of its monthly income on food, 23% on rent, and 42% on other expenses and saves the balance. If the family saves \$360 per month, what is its monthly income?
March 18, 2008

physics.
A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/Lo does the length of the beam increase when the temperature changes from that on a cold winter day (-15 degree F) to that on a summer day (+ 105 degree F)? I got 0.00144 for the answer, ...
February 10, 2008

economics
what is a country's excess quantity of demand to a nation's? exports or imports
February 9, 2008

problems faced in conserving kalimantan rainforest
The tropical rain forest aer home to over_of the world's species of life.
December 23, 2007

Algebra
Find the value of y in each formula if x= -3. y + 1 = 2(x - 5) Substitute -3 for x. The first step leaves you with this: y + 1 = 2 * (-8) = -16 Now solve for y by subtracting 1 from each side of the equation.
July 7, 2007

Algebra
Solve problem by showing necessary steps to resolve. 0.06q + 14 = 0.3q - 5.2 Subract 0.06 q from both sides. 14 = 0.24q - 5.2 Add 5.2 to both sides 19.2 = 0.24 q Finally, divide both sides by 0.24 You will end up with q on one side of the equation and a number which is the ...
July 7, 2007

Math
What is the value of y if x = -3? y = 1 = 2(x-5) Plug in -3 for x, in the equation for y, and see what you get. I think you copied the problem wrong. Is the first = sign supposed to be a + or - sign? If not, you have already stated that y = 1. That cannot be true when x = -3. ...
June 29, 2007

Earth science
I would like to comfirm that the 4 cycles on Earth are: carbon, water and rock. I think the 4th one is the biosphere but am not sure as the biosphere contains all attributes necessary (including the atmosphere)for life to exist. Am I on the track? I do understand that the ...
April 25, 2007

geology
there are 3 rock types:(a)igneous,(b)sedimentary,(c)metamorphic.If rock (a)were to cut across both other rocks and (c) is the oldest rock, describe the new relationship between the rocks. are you doing 103 by any chance im stuck on this q as well and thought it might be asking...
April 20, 2007

biology
in addition to the above a labelled diagram is also required to show the product cells derived from this cell at the telophase 2 stage of meiosis.there is no crossng over.what differences would there be in the product cells at telophase 2 of meiosis if there had been one ...
March 24, 2007

biology
Help required, Gametes are produced in the process of meiosis. In humans, one pair of autosmes (chromosome 4) has a short arm and a long arm. On the short arm is a gene for Huntington disease (H) and on the long arm is a gene for red hair(R). Draw a labelled diagram to show ...
March 24, 2007

biology
Help needed to draw a mating diagram where L is the dominant gene for the digestion of lactose and shows the crosses between two heterozygotes and wiht the the phenotypic and genotypic ratio of the offspring in the F1 generation. I also need to know the phenotypic prportions ...
March 13, 2007

chemistry
help required in calculating the pH value of a .84 mols per litre solution of sulfuric acid. I understand that pH = -log 10 (2x 0.84), I am not very experienced with logs and need assistance as to which keys to press on the scientific calculator in relation to the logs. thank ...
March 6, 2007

chemistry
I am in the process of calculating the hydrogen ion concentration in a .25litre solution of sulfuric acid,.21g of sulfuric acid was disolved in water to make the solution. I have calculated the molarity of the acid to be 2.14x10^-3 mol per litre. I also need help in ...
March 5, 2007

chemistry
I require assistance with the drawing of the lewis structures for hydrogen cyanide and cyanogen. I have already drawn the structured molecular formulas and am now stuck. H:C:::N: :N:::C:C:::N:
March 5, 2007

chemistry
In the compound tocainide I need to identify the two groups of atoms/groups that are linked with its binding to receptor cells in the human body by hydrogen bonding. I have understood the two groups to be alcohol and acid but am stuck on the next part. Hmmm. What alcohol. I ...
February 15, 2007

chemistry
I would like my equation checked, sodium cyanide and water.I have worked the balanced equation as: NaCN+H20=NaOH+HCN. If you want the molecular equation this looks good to me. Actually, it's the CN^- that is hydrolyzed (reacts with water) and the ionic equation is CN^- + ...
February 8, 2007

chemistry
I need help in drawing a structual formula for hydrogen cyanide(HCN)and cyanogen(CN)2, the drawing has to bear in mind the valencies of hydrogen(1),nitrogen(3) and carbon (4), any help appreciated H:C:::N: :N:::C:C:::N: Check my thinking. The previous one, too.
February 6, 2007

chemistry
help needed in drawing the diagram to show how hydrogen has numerous spectral lines I also need help with this question.... ---------------- ---------------- ---------------- ---------------- ---------------- -------------------- Each line above represents an energy level for ...
February 6, 2007

1. Pages:
2. <<Prev
3. 1
4. 2
5. 3
6. Next>>