Wednesday
December 17, 2014

Posts by Rachel


Total # Posts: 1,255

Physics
First you need to solve for time by using d=(1/2)(a)(t^2)+(vi)t 1m=(1/2)(9.8)t^2 vertical initial velocity is 0m/s t=.45 sec Then you find the horizontal distance traveled by using v=d/t 1.3m/s=d/.54sec d=.585m Then you need to find the time of player B by using d=(1/2)(a)(t^2...
September 20, 2010

calc 3
Find the limit ( e^-3t i + tsin(1/t)j + arctan tk ) if it exists. If not say doesn’t exsist. (t→ ∞)
September 20, 2010

Math 117
length = x width = x-l area = length*width 12 = (x)*(x-1) solve for x... use the equations above to get the length and width..
September 19, 2010

calculus
f(x)=kx^2+3 a) if the tangent lines to the graph of f at (t,f(t)) and (-t, f(-t)) are perpendicular, find t in terms of k b) Find the coordinate of the point of intersection of the tangent lines mentioned in part (a) in terms of k
September 19, 2010

Science
A passenger in a moving train drops an apple. Describe how a man standing by the train tracks sees the apple falling when he looks through the window.
September 18, 2010

math 115
f(-4)=4-2(-4) f(-4)=4+8 f(-4)=12 you must be bored of me by now..haha!
September 16, 2010

math/115
you're welcome again.. =)
September 16, 2010

math/115
solve the second one by substituting x with -3...
September 16, 2010

math/115
substitute the x with 3 for the first question.. you'll get f(3)=2(3)-14 f(3)=6-14 f(3)=-8
September 16, 2010

math 115
you're welcome!
September 16, 2010

math 115
when x=5, substitute all the x's with 5.. do the same when x=-5
September 16, 2010

math 115
h(5)=19-5 h(-5)=19+5
September 16, 2010

math
(3x)(10-5)=(x)(5-x) 30x-15x=5x-x^2 divide the whole equation by x 30-15=5-x solve for x
September 16, 2010

11th grade
you're welcome!
September 16, 2010

11th grade
for example in #1. 2x-1=y if y=0; 2x-1=0 then x=1/2 if x=0; 2(0)-1=y then y=-1 on the graph plot the points (1/2,0) and (0,-1) draw a line containing those points..
September 16, 2010

11th grade
does it help?? :)
September 16, 2010

11th grade
each of those functions form a line.. for each function, solve the value of x when y=0. solve the value of y when x=0.. plot the two points in the graph then connect them to form a line...
September 16, 2010

11th grade
are you supposed to graph those functions?
September 16, 2010

11th grade
what is the question?
September 16, 2010

math
so what's the question?
September 16, 2010

algebra
x+1/2=1 | x+1/2=-1 x=1-1/2 | x=-1-1/2 x=1/2 | x=-3/2
September 16, 2010

Math
sorry again! 100=4(x)+2(40-x) is the right one..
September 16, 2010

Math
sorry!!! cows=x chickens=40-x 100=2(x)+4(40-x)
September 16, 2010

Math
chickens = 40/2 cows = 100/4
September 16, 2010

Math
number of cars skywalks = x toyotas = 2x pintos = 2x-8 grand arms = 4(2x-8) = 24 solve for the x using the grand arms equation above... substitute x to the equations to get the number of cars per type of car.. add all the cars from each type..
September 16, 2010

math
solve for x and then find out how much each person gets using by substituting x to the values..
September 16, 2010

math
sorry! theres a modification: the 2 grandchildren each gets x dollars. son gets 2(2x) dollars widow gets 2(2x)+2000+2x dollars all add up to $62000
September 16, 2010

math
the 2 grandchildren each gets x dollars. son gets 2(2x) dollars widow gets 2(2x)+2000 dollars all add up to $62000
September 16, 2010

Math
if either a or b is equal to 0, (a+b)^2 and a^2 + b^2 will have the same values.
September 16, 2010

Math
0 (a+b)^2=a^2+b^2 a^2+2ab+b^2=a^2+b^2 2ab=0 then: a=0 and b=0
September 16, 2010

Math
find the LCM
September 16, 2010

Geometry
welcome.. =]
September 16, 2010

Geometry
the first line should be "5x+9=3x-33"
September 16, 2010

Geometry
5x+9=3x=33 5x-3x=33-9 2x=24 x=12 BK=2(5(12)+9) =138
September 16, 2010

statistics
In a survey of 5100 TV viewers, 40% said they watch network news programs. Find the margin of error for this survey if we want 95% confidence in our estimate of the percent of TV viewers who watch network news programs. Hint, find the CI using 1-PropZInt, then add and subtract...
September 13, 2010

Finance
a. 7.11% b. N = 10, PV = -985, PMT = 70, FV = 1000 YTM = 7.2157% = 7.22% c. N = 7, I/YR = 7.2157, PMT = 70, FV = 1000 PV = $988.46
September 9, 2010

Science - Physics
How long would it take you to drive from Houston to Gatorville LA (235 miles0 if you drive the first 75 miles at 60 mph, the next 100 miles at 65 mph, and the last 60 miles at 70 mph? What is your average speed for the entire trip?
September 6, 2010

algebra
(2t+3)11
August 25, 2010

Environmental health
Is it true or false that risk to a population group is generally expressed as the likelihood of an event happening?
August 21, 2010

com156
How does prewriting affect the success of an essay
August 18, 2010

algebra
The Big Screamer Coaster carries 92 people altogether. Some of its cars carry 4 passengers, and the rest carry 6 passengers. There are three less 6-passenger cars than 4-passenger cars. How many 4-passenger cars are there?
August 10, 2010

AP Biology
Yes, but none satisfy the problem.
August 1, 2010

AP Biology
What is not dependent on sunlight as a source of energy? A. Benthic Zone B. Pelagic Zone C. Neritic Zone D. Taiga E. Tundra Please answer A.S.A.P.
August 1, 2010

AP Biology
I think it is between A or B.
August 1, 2010

AP Biology
The type of learning that is involved in predator/prey interactions where an alteration in behavior is a response to stimulus is called? A. Habituation Learning B. Cognitive Learning C. Instinctive Learning D. Associative Learning E. Non-associative Learning Please, answer A....
August 1, 2010

Math
how do you calculate the fomula for a pyramid?
July 13, 2010

His/135
How do I describe the social, economic, and political composition of te decade of corporate greed and how it affected the political climate of the 1980s?
June 9, 2010

Thanks!
:)
June 8, 2010

Math
Describe each set of points for the given mathematical statement. (x + 3)^2 + (y - 4)^2 = 9 How would I figure this out? Any help would be great, thanks! :)
June 8, 2010

english
Can anyone tell me the tone of this poem? THE INVADING SPRING - Phoebe Hesketh Man has fenced the wilderness back in the hills; Tamed in the town he walks on concrete blocks; And in the park his heart with pleasure fills - But not at Wordsworth’s school-book daffodils. No...
June 6, 2010

Science
Okay, I get that. But I don't know where I would find these answers. Which is why I'm here asking you because honestly, I don't know them at all!
May 26, 2010

Science
These are all fill in the blank questions. Most objects _____ some colors or wavelengths of light and ____ others. When you paint a picture in art class the color is produced by color _____. Color was assed by hand called ____. __________ developed the making of metal letters ...
May 26, 2010

Science
We see a specific color, like yellow, because only yellow ____ are bounced back to your eyes.
May 26, 2010

science
s it possible for seismologist to know for sure that an earthquake or volcanic eruption will not occur in a particular area? And why
May 25, 2010

Physics
What causes the restoring force in a simple pendulum? A. friction between the thread and the support B. the force exerted on the pendulum bob while displacing it from the mean position C. the component of the weight of the bob acting perpendicular to the thread D. the ...
May 25, 2010

algebra
How do you solve this math problem? h= -8t^2+40t then it says: when t=0 and when t= 5 there are 2 questions that i have to answer: 1.) find the value of h 2.) graph this equation - i dont know if i did the problem right but when i answered #1 i got h=0, - and when i answered #...
May 21, 2010

physics
The energy difference between states A and B is twice the energy difference between states B and C (C > B > A). In a transition (quantum jump) from C to B, an electron emits a photon of wavelength 600 nm.
May 18, 2010

space
Which planet number are we?
May 17, 2010

Math
How do you solve an Expression?
May 17, 2010

Physics (math)
Fayce Slift found that it took her 132 steps to pace off 100.0 m. She was studying the flying trapeze. She noticed that when the ride was running that the chairs swung outward. She found that it took her 14.5 steps to go from the outside of the swing path on one side to the ...
May 9, 2010

distillation
what is the purpose of adding packing material to the distillation column? what is the purpose of insulating the distillation column?
May 6, 2010

Chemistry
Calculate the pH of a buffered solution that is 0.100M in C6H5COOH (benzoic acid, Ka = 6.4 x 10-5) and 0.100M in sodium benzoate (NaC6H5COO).
May 5, 2010

Chemistry
How many mL of 0.75M HCl are needed to neutralize 20.0 grams of NaOH?
April 29, 2010

Chemistry
How many mL of 0.75M HCl are needed to neutralize 20.0 grams of NaOH?
April 29, 2010

english
how does anna feel about what is happening to her family from the play Thunder on Sycamore Street
April 26, 2010

Science
I'm trying to determine what fossil fuel contributes the most to acid rain. I said coal because it is thought to be the "dirtiest" fuel with the greatest carbon footprint. Do you think this is correct?
April 26, 2010

Question about University (general).
Hello! I'm just trying to get an understanding of the reputations of some of the fine post-secondary institutions in Canada. I know this is not a homework question, and that all of the educators on this site are busy helping with homework questions. But, considering most ...
April 23, 2010

math
Soybean Meal Is 16% Protein; Cornmeal Is 8% Protein. How Many Pound Of Each Should Be Mixed Together In Order To Get 320 Lb. Mixture That Is 15% Protein?
April 23, 2010

english
it is B.
April 20, 2010

ochem
What's an equation of the hydrolysis of one ester group in tannins by CaCO3?
April 16, 2010

chemistry
how would longer roasting time of green coffee beans effect its caffeine content? why?
April 14, 2010

11th grade chemistry
How many grams are in 2.7 mol of table salt, NaCl (molar mass of NaCl=58.44 g/mol)?
April 13, 2010

trig
The function d=-8cos2t describes a simple harmonic motion, where d is the distance(in meters) an object travel in t seconds. What is the frequency?
April 13, 2010

trigonometry
The function d=11cos6t describes a simple harmonic motion, where d is the distance(in meters) an object travels in t seconds. What is the time required for one complete cycle?
April 13, 2010

Global Studies
I have to write a story taking place in Eastern Asia. I've decided to write about a South Korean exploring life in North Korea. Would they need to sneak in or are they permitted to go?
April 12, 2010

Math
1. sin (teta) / cot (teta) + cos (teta) = sec (teta) --> sin (teta) divide 1 / tan (teta) + cos (teta) I'm stuck now because i dont know where to go from here
April 7, 2010

chemistry
how much CO2 can be produced if 100 g glucose is allowed to react with 100 g O2? which is the limiting reactant, oxygen pr glucose?
April 5, 2010

biology
Honeybees are asexual because not only do I check the websites for facts but also my textbook. thanks for the search engine but i wanted environmental conditions for asexual and sexual reproduction but i found some good websites. Thanks alot!!!
April 5, 2010

biology
What environmental conditions would favor sexual reproduction? What environmental conditions would favor asexual reproduction? Organism - sexual reproduction - gonads asexual reproduction - honeybees - Is pillbugs an asexually organism or is a sexually organism? I think its ...
April 5, 2010

math
Prove this identity (cos è - 1) / (cos^2 è) = sec è - sec^2 è I have a question when you simplify the secant in terms of cosine. Would you cross multiply but then again there's the subtraction sign there instead of a multiplication sign? then ...
April 5, 2010

English
I'm sorry i didnt see this question posted, by accident i made the same question. I'm sorry once again.
April 5, 2010

English
A moral defect in a work of art is always also an artistic defect What does this quote mean? Therefore, any defects of art can easily give away clues. I'm confused with this quote.
April 5, 2010

English
A moral defect in a work of art is always also an artistic defect. What does this mean? Therefore, any defects can easily give away clues. I'm confused with this quote.
April 5, 2010

GRD 11-NEEED IT FAST, EMERGENCY
Line of best fit
April 4, 2010

English
“I've got a theory that if you give 100 percent all of the time, somehow things will work out in the end.” by Larry Bird, im thinking if this is the quote related to perverse but im confused on what the quote is stating
March 31, 2010

English
Oh okay. When i looked up i've got a theory i thought it was related to lyrics of a song or something else. But thanks
March 31, 2010

English
Can someone explain this....."I've got a theory". I looked up the def. of perverse and realized it's someone who is stubborn or wrongly self-willed. But I'm confused on that quote stating "I've got a theory". How is this quote related to ...
March 31, 2010

chemistry
What quantity of heat is required to warm 53.7 g of liquid water from 0°C to 100°C?
March 29, 2010

math
y=5x+5 2y+10x=-78 Please help i dont know how to solve this System of Equations Thanks
March 29, 2010

physics
A box weighs 50 N, placed on a titled board (30). What force must be applied to pull the box up the board at constant velocity(u=0.35)
March 25, 2010

Math
what is thr perimeter of an equilateral triangle that measurea 4 in one side
March 24, 2010

Math
How do I find the dimensions of a piece of wrapping paper used to wrap the box? The dimensions are 15in, 9in, 4in. The Surface area equals 462. I dont know to make it into an answer like 40 in. BY 10in
March 24, 2010

Math
Surface area and I was wrong it ='s 462.0
March 24, 2010

Math
How do I find the dimensions of a piece of wrapping paper used to wrap the box? The dimensions are 15in, 9in, 4in. The SA equals 270. I dont know to make it into an answer like 40 in. BY 10in
March 24, 2010

french
what does nous avons bu un cafe mean?x
March 14, 2010

Chemistry- Solubility Curves
If 50 grams of water saturated with potassium chlorate at 23*C is slowly evaporated to dryness, how many grams of the dry salt will be recovered? I know that I should know this.. But it has 50 grams of water instead of 100. ): Please, someone tell me how to do this?
March 10, 2010

organic chemistry
how do you increase the yield of triphenylmethanol in a grignard reaction?
March 8, 2010

organic chemistry
how do you increase the yield of triphenylmethanol in a grignard reaction?
March 8, 2010

chemistry
I am doing stoicheometry and I need help. Is there anyone who knows about it? It's in my chemistry class. HELP! I am in tears and cannot figure this out.
March 2, 2010

chemistry
if you started with 2.154g of aluminum, how many grams of aluminum oxide would you get?
March 1, 2010

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